In traditional mass media, advertising is the paid media space that sponsors use to persuade audiences
Advertising is a form of communication aimed at publicizing a product or service in order to influence the public to purchase or use it.
This type of communication is paid and promoted by companies and media with a commercial purpose.
For example, a company specializing in designing and implementing ads for other company's products is an advertising company.
There are four types of advertising:
DisplayVideoMobileNativeWhat is communication?the communication is a process through which information is transmitted through the use of oral or written language.
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How is energy transferred during the water cycle? Question 1 options: Water gains energy during evaporation and releases it during condensation in the atmosphere Water gains energy during evaporation and condensation in the lithosphere. Water gains energy in condensation and releases it in evaporation. Water releases energy during evaporation and condensation.
Answer:
Water gains energy during evaporation and releases it during condensation in the atmosphere
Explanation:
In the water cycle, heat energy is gained or lost by water as it undergoes various processes in the cycle.
In evaporation, water molecules gains energy because the molecules of water vibrate faster and become more energetic. Hence they are able to escape into the atmosphere from the surface of the liquid.
In condensation, the molecules of gaseous water looses energy and becomes liquid.
Hence, water gains energy during evaporation and releases it during condensation in the atmosphere.
Answer:
K12 HE HE
Explanation:
Which of the following is true about the shape (multiplicity) of the signal in a 1H NMR spectrum?
It indicates the electronic environment of absorbing protons.
It indicates the number of protons in the signal.
It indicates the electronic environment of neighboring protons.
It indicates the number of neighboring protons.
It indicates the number of different protons
The true statement about the shape (multiplicity) of the signal in a 1H NMR spectrum is that it indicates the number of neighboring protons.
In a 1H NMR spectrum, the multiplicity refers to the splitting pattern observed in a signal, which provides information about the neighboring protons.
The presence of neighboring protons affects the magnetic environment experienced by a particular proton, leading to splitting of the NMR signal. The number of peaks in a signal corresponds to the number of neighboring protons.
The concept of multiplicity is determined by a principle known as the n + 1 rule, where "n" represents the number of neighboring protons.
For example, if a proton has two neighboring protons, it will exhibit a signal with a triplet (three peaks) due to the splitting caused by the two neighboring protons. Similarly, a proton with three neighboring protons will result in a quartet signal (four peaks).
By analyzing the multiplicity of signals in a 1H NMR spectrum, chemists can determine the number of neighboring protons and gain insights into the molecular structure and connectivity of the compound under study.
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Marking as brainliest last attempt
(ZOOM IN THE PHOTO) use the graphic organizer for writing ur paragraphs
write a paragraph about the topic : bullying in schools
help pls help pls help pls help pls help pls
Why does the Sun emit neutrinos? Solar flares create neutrinos with magnetic fields_ Convection releases neutrinos, which random walk through the radiation zone. The Sun does not emit neutrinos Neutrinos are a by-product of fusion in the Sun's core in step of the p-p process
The Sun emit neutrinos because of the fusion in the Sun's core creates neutrinos.
Most of the neutrinos that are currently flowing through you came from the sun. Every second, a hundred billion solar neutrinos travel through our fingernail.
Nuclear fusion occurs in the sun, where it results in the creation of neutrinos. Protons, the nucleus of the most basic element, hydrogen, combine during fusion to create helium, a heavier element.
As a result, neutrinos and energy are released, which will eventually manifest on Earth as light and heat.
These solar neutrinos represent an overall energy emission from the Sun of about 1%. Every second, the Sun emits 1038 neutrinos, each carrying 4 1024 W of electricity.
The sun's core can also be directly understood through the use of solar neutrinos. Unexpectedly, neutrinos generated in the sun's core reach to
Earth before light from the sun (formed in the same reaction), something we would not expect. This isn't because neutrinos can move more quickly than light since they can't.
Neutrinos encounter with matter so infrequently that they are able to immediately depart the sun's dense core, whereas photons (the light particles) bounce around before breaking free.
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A ramp with a mechanical advantage of eight lifts objects to a height of 1.5 meters. How long it the ramp?
i will give 15points for help!!
Answer:
12 m
Explanation:
Given data:
M.A. = 8 (No units),
Ramp height (h)= 1.5 m, lifted,
Determine how long is the ramp=?
General formula
Mechanical Advantage = (Ramp length) ÷ (Ramp height),
M.A = l ÷ h
8 × 1.5 = l = 12 m long
length of the ramp l ramp = 12 m
which property of venus's atmosphere gave rise to the runaway greenhouse effect?
The property of Venus's atmosphere that gave rise to the runaway greenhouse effect is the abundance of carbon dioxide (CO₂).
Venus has an extremely dense and predominantly carbon dioxide atmosphere, with CO₂ constituting about 96% of its atmospheric composition. This high concentration of greenhouse gases creates a thick blanket around the planet, trapping heat from the Sun and preventing it from escaping back into space. As a result, Venus experiences a significant greenhouse effect, causing its surface temperatures to soar to extreme levels.
The greenhouse effect occurs when certain gases in an atmosphere absorb and re-emit infrared radiation, trapping heat and warming the planet. In the case of Venus, the high concentration of CO₂ acts as a potent greenhouse gas, trapping a substantial amount of heat energy. The absorbed solar radiation causes the temperature to rise, leading to a positive feedback loop. As the temperature increases, more carbon dioxide is released from surface reservoirs, such as rocks and volcanic activity, further enhancing the greenhouse effect and causing even higher temperatures.
This positive feedback loop sets off the runaway greenhouse effect on Venus, where the extreme heat leads to the release of more CO₂, which in turn traps more heat, causing a continuous cycle of heating. As a result, Venus experiences a surface temperature of around 900 degrees Fahrenheit (475 degrees Celsius), hot enough to melt lead.
The runaway greenhouse effect on Venus serves as a cautionary example of the potential consequences of unchecked greenhouse gas emissions on Earth. Understanding the factors that contribute to Venus's extreme greenhouse effect helps scientists better comprehend the delicate balance of Earth's atmosphere and the importance of mitigating human-induced greenhouse gas emissions to avoid similar catastrophic outcomes.
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PLZ HELP ASAP THX
If scientists is designing a device to create high energy electromagnetic waves which type of wave would the device most likely create?
Microwaves
Infrared waves
Ultraviolet waves
Gamma ray waves
Answer:
Gamma ray waves
Explanation:
Gamma ray waves carry the most energy electromagnetic waves.
Hope this helps, thank you !!
An object is moving back and forth on the x-axis according to the equation x(t) = 3sin(20πt), t> 0, where x(t) is measured in cm and t in seconds. Give decimal answers below. (a) How many complete back-and-forth motions (from the origin to the right, back to the origin, to the left and finally back to the origin) does the object make in one second? (b) What is t the first time that the object is at its farthest right? (c) At the time found in part (b), what is the object's velocity? (d) At the time found in part (b), what is the object's acceleration?
Answer:
a.) 10Hz
b.) 0.1 s
c.) 187.4 m/s
d.) -412.6 m/s^2
Explanation:
Given that an object is moving back and forth on the x-axis according to the equation x(t) = 3sin(20πt), t> 0, where x(t) is measured in cm and t in seconds. Give decimal answers below.
(a) How many complete back-and-forth motions (from the origin to the right, back to the origin, to the left and finally back to the origin) does the object make in one second?
from the equation given, the angular speed w = 20π
but w = 2πf
where f = frequency.
substitute w for 20π
20π = 2πf
f = 20π/2π
f = 10 Hz
(b) What is t the first time that the object is at its farthest right?
since F = 1/T
T = 1 / f
T = 1/10
T = 0.1 s
Therefore, the t of first time that the object is at its farthest right is 0.1 s
(c) At the time found in part (b), what is the object's velocity?
The velocity can be found by differentiating the equation;
x(t) = 3sin(20πt)
dx/dt = 60πcos(20πt)
where dx/dt = velocity V
V = 60πcos(20π * 0.1)
V = 187.4 m/s
(d) At the time found in part (b), what is the object's acceleration?
to get the acceleration, differentiate equation V = 60πcos(20πt)
dv/dt = -1200πSin(20πt)
dv/dt = acceleration a
a = -1200πSin(20πt)
substitute t into the equation
a = -1200πSin(20π * 0.1)
a = - 412.6 m/s^2
The type of motion the object undergoes that consist of a back-and-forth
movement that is repetitive is a simple harmonic motion.
The correct responses are;
(a) Number of complete back-and-forth motions per second is 10(b) The first time is after 0.025 seconds(c) Velocity is 0(d) Acceleration is approximately -11843.53 m/s²Reasons:
The equation that represents the motion of the object is x(t) = 3·sin(20·π·t)
Where;
t ≥ 0
x(t) is in cm, and t is in seconds.
(a) The general sine function is y = A·sin(B·(t - C) + D
\(\mathrm{The \ period \ P} = \dfrac{2 \cdot \pi}{B}\)
By comparison, we have;
B = 20·π
Therefore;
\(P = \dfrac{2 \cdot \pi}{20 \cdot \pi} = \dfrac{1}{10} = 0.1\)
The period, which is the time to complete one cycle = 0.1 seconds
The number of cycle completed per second, is the frequency, f
\(f = \dfrac{1}{P} = \dfrac{1}{0.1} = 10\)
f = 10 Hz = 10 cycles
The number of cycle completed per second is f = 10 cycles
(b) When the object is at the farthest right, we have;
sin(20·π·t) = Maximum = 1
\(\mathbf{sin\left(\dfrac{\pi}{2}\right)} = 1\)
Therefore,
\(20 \cdot \pi \cdot t = \dfrac{\pi}{2}\)
\(t = \dfrac{\pi}{20 \cdot \pi \cdot 2} = \dfrac{1}{40} = 0.025\)
The first time it is at the farthest right is t = 0.025 seconds after start
(c) \(\mathrm{Velocity, \ v, \ is \ given \ by \ v = \dfrac{dx(t)}{dt}}\)
Therefore;
\(v = \dfrac{dx(t)}{dt} = \dfrac{dx(t)}{dt} \left(3 \cdot sin \left(20 \cdot \pi \cdot t \right) = 60\cdot \pi \cdot cos \left(20 \cdot \pi \cdot t \right)\)
At t = 0.25 seconds, we have;
\(v = \dfrac{dx(t)}{dt} = 60\cdot \pi \cdot cos \left(20 \times \pi \times 0.025 \right) = 0\)
The velocity of the object at the t = 0.025 seconds is v(t) = 0
(d) Acceleration, a, is given by \(a = \dfrac{dv(t)}{dt}\)
Therefore;
\(a = \dfrac{dv(t)}{dt} = \dfrac{d}{dt} \left( 60\cdot \pi \cdot cos \left(20 \times \pi \times t\right) \right) =-1200 \cdot \pi ^2 \cdot sin(20 \cdot t \cdot \pi)\)
a = -1200·π²·sin(20·t·π)
∴ a = -1200×π²×sin(20×0.025×π)
sin(20×0.025×π) = 1
∴ a = -1200×π²×1 ≈ -11843.53
At the time found in part b the acceleration of the object, a ≈ -11843.53 m/s²
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A ______ is like a ramp that can work while it is in _____.
A wedge is like a ramp that can work while in motion.
What is ramp?
As a tool for raising or lowering a load, an inclined plane, also referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other. One of the six traditional simple machines that Renaissance scientists defined is the inclined plane.
Heavy loads are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending a grade.
Less force is needed to lift an object up an inclined plane than to lift it straight up, but the distance travelled is greater. Hence, a wedge is like a ramp that can work while in motion.
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editors correct misrecognitions after the physician completes dictation when _______ is used.
Editors correct misrecognitions after the physician completes dictation when speech recognition technology (SRT) is used.
Speech recognition technology, also known as speech-to-text or voice recognition software, is employed to convert spoken language into written text. It is often used by physicians to dictate medical reports, notes, or documentation. However, due to the inherent complexities of speech recognition, errors and misrecognitions can occur in the transcribed text.
After the physician completes dictation using speech recognition technology, editors review and correct any misrecognitions or inaccuracies in the transcribed text.
Editors play a crucial role in ensuring the accuracy, clarity, and coherence of the final document by carefully reviewing the dictated text, comparing it with the audio recording if available, and making necessary corrections.
This editing process helps to enhance the quality and reliability of medical documentation, reducing the potential for errors and misinterpretations. The collaboration between speech recognition technology and skilled editors improves the efficiency of generating accurate medical records while maintaining a high standard of precision in the final documents.
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a person jumps from a tower 5.0 m high. when he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 m. if the mass of his torso (excluding legs) is 50 kg, find (a) his velocity just before his feet strike the ground, and (b) the average force exerted on his torso by his legs during the deceleration
a) v = 9.8 m/s is his velocity just before his feet strike the ground.
b) When he slows down, his legs apply an average force of 3430 N to his torso.
What is deceleration?Therefore, deceleration is defined as a reduction in speed as the body moves away from the beginning location. The opposite of acceleration is deceleration.
Given parameters;
Height of the tower , h = 5.0m
Distance of deceleration, d = 0.70m
Mass of the tensor, m = 50 kg
Final speed of the person calculated as:
1/2mv² = mgh
v² = 2gh
v = \(\sqrt{2gh}\)
v = \(\sqrt{2*9.8*5}\)
v = 9.8 m/s.
The torso's deceleration over the specified distance is
v² = u²+2as
a = v²-u²/2s
a = 0- 9.8²/2*0.7
a = 68.6m/s²
The average amount of force his legs apply to his body as he slows down is:
F = ma
F = 50× 68.6
F = 3430 N.
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Gas and oil from the dead creatures, the gas, and oil are trapped under layers of rock
use the idea of density to explain why the gas is on top of the oil
Answer:
Gas is on top of oil
Explanation:
Gas is less dense ( smaller density ) than oil which is more dense. Since density is directly proportional to mass and inversely proportional to volume, gas will occupy a larger space than oil.
The larger space occupied is the space above the mixture of oil and gas, hence gas is above oil
Typical Pressurized Water Reactors can produce 1100 to 1500
megawatts, or about _______
Joules/second.
Answer: about 1,100,000,000 to 1,500,000,000 Joules/second
Explanation:
1 MW (megawatt) = 1,000,000.00 J/s (joules per second)
1100(1,000,000) = 1,100,000,000
1500(1,000,000) = 1,500,000,000
Consider a particle constrained to move in the x−y plane. One state the particle can be in has the following wavefunction in the x−y position representation: ψ(x,y)=Nexp{− 2σ 2
x 2
}exp{− 2σ 2
y 2
}, shere N is a normalization coefficient and σ is a length scale. A different possible state has the vavefunction φ(x,y)=Nexp{ ℏ
iay
}exp{− 2σ 2
(x−d) 2
}exp{− 2σ 2
y 2
}. a) For ψ(x,y), give the expectation values ⟨ X
^
⟩,⟨ Y
^
⟩,⟨ P
^
x
⟩, and ⟨ P
^
y
⟩, which correspond to expecation values of the position and momentum operators for the x and y directions. b) For φ(x,y), give the expectation values ⟨ X
^
⟩,⟨ Y
^
⟩,⟨ P
^
x
⟩, and ⟨ P
^
y
⟩.
Expectation value of position in the x-direction, ⟨X^⟩: We apply the position operator, X^, to the wavefunction and integrate:
⟨X^⟩ = ∫ xψ(x, y) dx dy = ∫ xNexp(-2σ^2x^2)exp(-2σ^2y^2) dx dy
To find the expectation values for the position and momentum operators, we need to apply the corresponding operators to the wavefunctions and integrate over the appropriate variables.
a) For the wavefunction ψ(x, y) = Nexp(-2σ^2x^2)exp(-2σ^2y^2):
Expectation value of position in the x-direction, ⟨X^⟩: We apply the position operator, X^, to the wavefunction and integrate:
⟨X^⟩ = ∫ xψ(x, y) dx dy
= ∫ xNexp(-2σ^2x^2)exp(-2σ^2y^2) dx dy
Similarly, we can find the expectation values ⟨Y^⟩, ⟨P^x⟩, and ⟨P^y⟩ by applying the respective operators and integrating over the variables x and y.
b) For the wavefunction φ(x, y) = Nexp(iay)exp(-2σ^2(x-d)^2)exp(-2σ^2y^2):
We follow the same procedure as in part a) to find the expectation values ⟨X^⟩, ⟨Y^⟩, ⟨P^x⟩, and ⟨P^y⟩ for the wavefunction φ(x, y).
The expectation values provide us with information about the average positions and momenta of the particle in the x-y plane for each wavefunction. By calculating these expectation values, we can gain insights into the behavior and properties of the particle in the given states.
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at what time ABC or D is the writer accelerating upwardwhat is the magnitude of the maximum acceleration experienced by the rider
We will have the following:
From the graph we can see that the point at which it is accelerating upward is at point C. [We can see that where the slope of the function is positive the acceleration will be positive]
We determine the maximum magnitude of the acceleration of the rider by using the maximum force, that is:
\(F=m\cdot a\Rightarrow1.20N=a=\frac{1.20N}{m}\)So, the maixmum magnitude of the acceleration will depend on the mass of the rider. Now, since the mass cannot be 0 kg since that would undetermine the expression we know then that the best approximation is:
\(a=\frac{1.20N}{m}\)Where "m" is the mass of the rider in kg. Since we are not given a mass, then the acceleration can only be expressed as the force divided by the mass of the rider.
PLEASE HELP!! WILL GIVE 20 BRAINY POINTS
Brian made this table to organize his notes on changes of state.
Which change of state has the wrong energy change listed?
A. condensation
B. deposition
C. melting
D. freezing
Answer: condensation
Explanation:
i hope it helped
An object is taken to Mars. It’s mass is 15kg, it’s weight on Mars is 55.5N
What is the gravitational field strength on Mars?
Answer:
Approximately \(3.7\; {\rm N \cdot kg^{-1}}\) (or equivalently, \(3.7\; {\rm m\cdot s^{-2}}\).)
Explanation:
Gravitational field strength measures the force (weight) that the field exerts on object of unit mass (e.g., \(1\; {\rm kg}\).)
Divide the weight of the object by its mass to find the gravitational field strength at the position.
In this question, \(\text{weight} = 55.5\; {\rm N}\) while \(\text{mass} = 15\; {\rm kg}\). Therefore, the gravitational field strength will be:
\(\begin{aligned} & (\text{gravitational field strength}) \\ =\; & \frac{(\text{weight})}{(\text{mass})} \\ =\; & \frac{55.5\; {\rm N}}{15\; {\rm kg}} \\ =\; & 3.7\; {\rm N \cdot kg^{-1}} \end{aligned}\).
Compile and share a list of "highly applicable tips" (8-10
points) related to organizational behavior and leadership. To
format your points properly, position yourself as a management
consultant who i
Each organization is unique, so tailor these tips to fit your specific context and needs. As a management consultant, I recommend assessing your organization's current state and identifying areas for improvement to implement these tips effectively.
As a management consultant, here is a compiled list of highly applicable tips related to organizational behavior and leadership:
1. Foster a positive organizational culture: Create a work environment that values collaboration, open communication, and employee well-being. Encourage a culture of respect, trust, and support.
2. Lead by example: As a leader, set a positive example through your actions and behaviors. Demonstrate the values and behaviors you expect from your team members.
3. Effective communication: Communication is crucial for building strong relationships and ensuring clarity. Practice active listening, provide constructive feedback, and encourage open and honest communication channels within the organization.
4. Empower and delegate: Trust your team members and empower them to take ownership of their work. Delegate tasks effectively, matching responsibilities with individuals' strengths and skills.
5. Encourage innovation and creativity: Foster an environment that encourages new ideas, creativity, and innovation. Provide opportunities for employees to contribute their ideas and reward innovative thinking.
6. Develop and support talent: Invest in employee development and provide opportunities for growth and learning. Offer training programs, mentorship, and coaching to help employees reach their full potential.
7. Build strong teams: Focus on building cohesive and high-performing teams. Foster collaboration, encourage diversity of thought, and promote teamwork to achieve collective goals.
8. Embrace change and adaptability: Organizational success often relies on the ability to adapt to changing circumstances. Encourage a mindset of flexibility, adaptability, and continuous improvement.
9. Practice ethical leadership: Uphold high ethical standards and lead with integrity. Make ethical decisions, promote fairness, and hold yourself and others accountable for ethical conduct.
10. Recognize and appreciate employees: Acknowledge and appreciate the contributions of your team members. Celebrate achievements, provide recognition, and offer rewards and incentives to motivate and retain talent.
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If a tennis ball has a velocity of 18 m/s and a momentum of 1.06 kg. m/s, what is the mass of the tennis ball in grams?
Round the answer to two significant figures.
Blank grams
Answer:
59g
Explanation:
The tennis ball with a velocity of 18 m/s and momentum of 1.06 kg m/s then the mass of the tennis ball in grams will be 59 grams (approx) two significant figures.
What is Momentum?Regardless of the frame of reference, momentum is a conserved quantity in any inertial frame, which means that if an enclosed system is not subject to outside influences, its total linear momentum remains constant.
Additionally, momentum is preserved in general relativity, electrodynamics, quantum mechanics, quantum field theory, and special relativity (using a modified formula). It is a manifestation of translational symmetry, one of the basic symmetries of space and time.
According to the question, the given values are :
Velocity, v = 18 m/s
Momentum, p = 1.06 kg m/s
p = m × v
1.06 kg m/s = m × 18 m/s
m = 1.06 / 18
m = 0.0589 kg or
m = 58.9 grams or 59 grams approx in two significant figures.
So, the mass will be 59 grams.
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A projectile has an initial horizontal velocity of 34.0 M/s at the edge of a roof top. Find the horizontal and vertical components of its velocity after 5.5s
I need shown work !
Answer:
\(v_x=34 m/s\)
\(v_y=53.9\ m/s\)
Explanation:
Horizontal Launch
When an object is thrown horizontally with a speed v from a height h, it describes a curved path ruled by gravity until it eventually hits the ground.
The horizontal component of the velocity is always constant because no acceleration acts in that direction, thus:
vx=v
The vertical component of the velocity changes in time because gravity makes the object fall at increasing speed given by:
\(v_y=g.t\)
The horizontal component of the velocity is always the same:
\(v_x=34 m/s\)
The vertical component at t=5.5 s is:
\(v_y=9.8*5.5=53.9\)
\(v_y=53.9\ m/s\)
Why are infrared waves ineffective for treating cancer
They do not transmit sufficient energy to kill cancer cells. Longer wavelengths than visible light define infrared waves (IR), a kind of electromagnetic radiation.
What are infrared ray?The electromagnetic radiation known as infrared, also referred to as infrared light, has wavelengths that are longer than those of visible light and shorter than those of radio waves. Wavelength range and sources: between 780 nm and 1 mm. Infrared radiation (IR), commonly referred to as heat radiation, is that region of the electromagnetic spectrum with wavelengths above red visible light, between 780 nm and 1 mm. IR can be divided into three groups: IR-A (780 nm-1.4 m), IR-B (1.4-3 m), and IR-C, commonly known as far-IR (3 m-1 mm).
IR wavelengths range from 700 nanometers (frequency 430 THz), which corresponds to the visible spectrum's notional red edge, to 1 millimeter (300 GHz). Long-term IR exposure, according to medical studies, can harm the lens, cornea, and retina, causing cataracts, corneal ulcers, and retinal burns, respectively. Workers can use gear with IR filters or reflective coating to help prevent long-term IR exposure. Electrical warmers, food-cooking appliances, remote controls, optical fibres, security systems, and thermal imaging cameras that can see individuals in the dark all employ infrared (IR) light. whereas, gamma rays, which have the highest energy (and thus the most penetrating), for instance, have higher frequencies than infrared waves.Gamma rays are the electromagnetic waves with the highest energy, highest frequency (300 EHz), and shortest wavelengths (1 pm) (1,24 MeV) and are used in treating cancer.
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What is the instantaneous velocity of a freely falling object 14 s after it is released from a position of rest
The instantaneous velocity of the object is 137.2 m/s along the downward direction.
Instantaneous velocity: The velocity of an object at a particular instant of time is called the instantaneous velocity.
Note: The y-axis is taken along the upward direction so acceleration due to gravity will be negative.
Any object that is falling freely is acted upon by gravity. The first equation of motion gives the relationship between initial velocity, the velocity at time t, time, and acceleration. The equation is,
v=u+at
where v is the velocity at time t, u is the initial velocity, t is the time, and g is the acceleration due to gravity. Since the object starts from rest, its initial velocity is zero.
For the given case, u=0, a=-9.8 m/s^2 and t=14 s. Put the values in the equation to get the instantaneous velocity of the object at t=14 s.
v=0+(-9.8)(14)
v=-137.2 m/s
The negative sign indicates the object is falling downward.
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2. A disc speeds up from rest at a constant rate of 2. 5 rad/s^2.
a. What is the final angular speed of the disc after 18 secs. ? (45 rad/s)
b. How many revolutions will the disc go through during this time period?
(64. 5 revs)
C. WHat is the linear speed of a point at the end of the disc after 18 secs. (The radius
of the disc is 50 cm. (22. 5 m/s)
I
a. The final angular speed of the disc after 18 seconds is 45 rad/s.
b. The disc goes through approximately 64.5 revolutions during this time period.
c. The linear speed of a point at the end of the disc after 18 seconds is 22.5 m/s.
a. The angular acceleration of the disc is constant at 2.5 \(rad/s^2\).
Using the formula for angular velocity with constant angular acceleration, we have:
ωf = ωi + αt
Where:
ωi = initial angular velocity (0, since the disc starts from rest)
α = angular acceleration (2.5 \(rad/s^2\))
t = time (18 s)
ωf = 0 + 2.5 × 18
ωf = 45 rad/s
Therefore, the final angular speed of the disc after 18 seconds is 45 rad/s.
b. To find the number of revolutions the disc goes through during this time period, we need to first find the total angle rotated by the disc. Using the formula for angular displacement with constant angular acceleration, we have:
θ = ωit + 1/2 α\(t^2\)
Where:
ωi = initial angular velocity (0, since the disc starts from rest)
α = angular acceleration (2.5 \(rad/s^2\))
t = time (18 s)
θ = 0 + 1/2 × 2.5 × \(18^2\)
θ = 405 rad
One revolution is equal to 2π radians,
so the number of revolutions is given by:
N = θ / 2π
N = 405 / 2π
N ≈ 64.5 revolutions
Therefore, the disc goes through approximately 64.5 revolutions during this time period.
c. The linear speed of a point at the end of the disc is given by:
v = rω
Where:
r = radius of the disc (50 cm = 0.5 m)
ω = angular velocity (45 rad/s)
v = 0.5 × 45
v = 22.5 m/s
Therefore, the linear speed of a point at the end of the disc after 18 seconds is 22.5 m/s.
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a lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. after several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. as the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. the lion and the gazelle eventually each reach constant but different speeds. which of the following sets of graphs shows a reasonable representation of the velocities of the lion and the gazelle as functions of time?
The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.
Velocity is the rate of change of displacement over time.
It has SI units as m/s.The total amount of movement of an object per unit time is also called velocity. It depends on both the size and direction of the moving object.Velocity can also be called as speed when distance is taken into consideration instead of displacement.As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.
So option A is correct.
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A baseball with a mass of 0. 15 kilograms collides with a bat at a speed of 40 meters/second. The duration of the collision is 8. 0 x 103 seconds. The
ball moves off with a speed of 50 meters/second in the opposite direction. What is the value of the force?
The value of force is 1.7 × 10⁻³ N, with the direction opposite to that of the bat's motion.
When an object collides with another object, they exchange energy. For example, a baseball and bat collision or a car collision. When two objects collide, the force of the collision has to be equal on both sides of the collision according to Newton's Third Law. So, to find the value of force, we will apply the equation:
F = ΔP / ΔT
where F is the force, ΔP is the change in momentum, and ΔT is the time of collision. The equation represents the impulse momentum theorem.
Now, let's apply the given values to the above equation.
Final momentum (p2) = mass × final velocity (v2)
p2 = 0.15 kg × (-50 m/s)
p2 = -7.5 kg.m/s
Initial momentum (p1) = mass × initial velocity (v1)
p1 = 0.15 kg × (40 m/s)
p1 = 6 kg.m/s
Change in momentum (ΔP) = p2 - p1
ΔP = -7.5 kg.m/s - 6 kg.m/s
ΔP = -13.5 kg.m/s
Time of collision (ΔT) = 8.0 × 10³ s
Now, putting the values of ΔP and ΔT in the equation of impulse momentum theorem, we get:
F = ΔP / ΔT
F = -13.5 kg.m/s ÷ 8.0 × 10³ s
F = -1.7 × 10⁻³ N
Thus, the value of force is 1.7 × 10⁻³ N, with the direction opposite to that of the bat's motion.
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which of these makes surface mining less risky than underground mining?
Answer:
B
Explanation:
If you really read and dissect every other question they do not make sense
which phenomenon is observed when two or more waves passing simultaneously through the same medium meet up with one another in space?
The phenomenon you are referring to is called wave interference. Wave interference occurs when two or more waves travel simultaneously through the same medium and meet up with one another in space.
This phenomenon can be observed in various types of waves, such as sound waves, light waves, and water waves.
There are two main types of wave interference: constructive interference and destructive interference. Constructive interference occurs when the crest of one wave aligns with the crest of another wave, resulting in a wave with a larger amplitude. This causes the waves to effectively "add" together, creating a more intense wave.
On the other hand, destructive interference happens when the crest of one wave aligns with the trough of another wave. In this case, the waves effectively "cancel" each other out, resulting in a wave with a smaller amplitude or even no wave at all.
Wave interference is an important concept in various scientific fields, such as physics, engineering, and acoustics. It helps us understand how waves interact with each other and their surroundings, which in turn enables us to design and develop various technologies and applications that rely on wave phenomena.
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answer them all please!!
Answer:
Digestive = large instestine
respiratory = lungs
circulatory red blood cell
neurons=nerves
Explanation:
please ans both urgent
Answer:
d I guess not sure
b if down I guess
Explanation:
if worng then plz dont say anything as I am not sure about the ans