Answer: Aplitude
Explanation: Loudness depends on the amplitude,or height, of sound waves. The greater the amplitude, the louder the sound perceived. Amplitude is measured in decibels.
Answer:
Amplitude
Explanation:
The loudness of a sound is determined by the amplitude of the wave. In terms of the pattern of a transverse wave, amplitude refers to how "high" and "low" the waves go from the center line.
PF
An object of mass m is at rest at the top of a smooth slope of height h and length l . the coefficient of kinetic friction between the object and the surface, μk, is small enough that the object will slide down the slope if given a very small push to get it started.
Sam, whose mass is 70 kg , stands at the top of a 14-m-high, 120-m-long snow-covered slope. His skis have a coefficient of kinetic friction on snow of 0.07. If he uses his poles to get started, then glides down, what is his speed at the bottom?
The expression for the object's speed at the bottom of the slope is:
v = sqrt(2gh - 2gLsinθ/mu_k)
To solve this problem, we can use the conservation of energy principle, which states that the total energy of a system remains constant as long as there are no external forces acting on it.
At the top of the slope, the object has only potential energy, given by:
Ep = mgh
where m is the mass of the object, g is the acceleration due to gravity, and h is the height of the slope.
As the object slides down the slope, it loses potential energy and gains kinetic energy. The work done by the force of gravity is equal to the change in potential energy, so we have:
mgLsinθ = mgh - (1/2)mv^2
where θ is the angle of the slope, and v is the speed of the object at the bottom of the slope. The left-hand side of this equation represents the work done by the force of gravity as the object slides down the slope, while the right-hand side represents the loss of potential energy and the gain of kinetic energy.
Solving for v, we get:
v = sqrt(2gh - 2gLsinθ/mu_k)
where mu_k is the coefficient of kinetic friction between the object and the surface.
Therefore, the expression for the object's speed at the bottom of the slope is:
v = sqrt(2gh - 2gLsinθ/mu_k)
in terms of the variables m, mu_k, L, h, and appropriate constants.
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The given question is incomplete, the complete question is:
An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction between the object and the surface, mu k, is small enough that the object will slide down the slope if given a very small push to get it started. Part A Find an expression for the object's speed at the bottom of the slope. Express your answer in terms of the variables m, mu k, L, h, and appropriate constants.
a solenoid with 200 loops is 60 cm long. it has a current of 1.2 a . what is the magnetic field in this solenoid?
The magnetic field in the solenoid is 0.028 T. To calculate the magnetic field in the solenoid, we can use the formula B = μ₀nI, where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.
First, we need to calculate the number of turns per unit length. We know that the solenoid has 200 loops and is 60 cm long, so the number of turns per unit length (n) is:
n = N / L
n = 200 / 0.6
n = 333.33 turns/m
Next, we can substitute the values into the formula:
B = μ₀nI
B = (4π x 10^-7 Tm/A) x (333.33 turns/m) x (1.2 A)
B = 0.028 T
Therefore, the magnetic field in the solenoid is 0.028 T.
The magnetic field in a solenoid with 200 loops and a length of 60 cm and a current of 1.2 A is 0.028 T. This can be calculated using the formula B = μ₀nI, where n is the number of turns per unit length and I is the current. The number of turns per unit length is calculated by dividing the number of loops by the length of the solenoid. The magnetic field can then be calculated by substituting the values into the formula.
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______is the change from a liquid to a gas at a temperature below boiling point
What ion is formed when an atom of magnesium (Mg) loses two electrons?
When an atom of magnesium loses two electrons, it forms a magnesium ion with a charge of +2.
Here's an explanation why:
An atom of magnesium (Mg) has 12 electrons in its neutral state and two electrons in its outermost shell. When it reacts with an electron acceptor and loses two electrons, the two valence electrons in the 3s subshell are lost, resulting in a stable electronic configuration of neon.
The resulting magnesium ion now has a 2+ charge and is represented as Mg2+.
Magnesium is a common alkaline earth metal that has 12 protons and 12 electrons in its neutral state. Magnesium has an atomic number of 12 and an atomic weight of 24.305 grams per mole. Magnesium is a silvery-white metal that is light in weight and has a melting point of 1,202 degrees Fahrenheit (650 degrees Celsius).
Mg2+ is a common ion in biological systems, and magnesium is the second most abundant cation in the human body after potassium. Magnesium's main function in the human body is to help with the maintenance of proper muscle and nerve function, as well as to help regulate the body's metabolic activities.
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Inside most ball-point pens is a small spring that compresses as the pen is pressed against the paper. If a force of 0.1 N compresses the pen's spring a distance of 0.005 m, what is the spring constant of the tiny spring?
Answer:
20 N/m
Explanation:
From the question,
The ball-point pen obays hook's law.
From hook's law,
F = ke............................ Equation 1
Where F = Force, k = spring constant, e = compression.
Make k the subject of the equation
k = F/e........................ Equation 2
Given: F = 0.1 N, e = 0.005 m.
Substitute these values into equation 2
k = 0.1/0.005
k = 20 N/m.
Hence the spring constant of the tiny spring is 20 N/m
Which ones are true which ones are false
Eric’s sister Marjorie is asked to explain the term deceleration. She tells Eric, “negative acceleration always means deceleration.” Eric tells her that she is wrong. He then explains her error. Which statement can Eric use to correct his sister?
A car moving to the right will still go to the right when the braking force is applied
A car moving to the right will always go to the left when the braking force is applied
A force applied in the opposite direction of an object’s motion will always reverse the motion of the object
A force applied in the opposite direction of the object’s motion will always bring an object to rest
A car moving to the right will still go to the right when the braking force is applied is about negative acceleration.
What is negative acceleration?Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.
When an item experiences negative acceleration, its velocity changes in a negative direction, which can suggest that it is moving either slower or faster. In physics, a change in an object's velocity is referred to as "acceleration."
Since this change in velocity is a vector quantity, it denotes both magnitude and direction. Positive velocity is also a vector, and experiencing negative acceleration means that something is slowing down.
Therefore, A car moving to the right will still go to the right when the braking force is applied is about negative acceleration.
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A car is traveling at a velocity of 22 m/s when the driver puts on the brakes
to decelerate it at 1.4 m/s? over a distance of 110 m. What is the car's
velocity at the end of this distance?
Answer:
v = v +at = 22 + (1.6 6.8 s ms) = 33 ms
Explanation:
What happens when a mixture is separated
A) A substance is lost
B) A new substance is formed
C) The substances stay the same
D) The mass of the substances change
Answer:
the answer would be c
Explanation:
Using your knowledge of the difference between the three different temperature scales what do you think would happen of the humans body temperature were 98.6 C? Make a claim about why doctors worry more about a fever of a couple of degrees Celsius than a fever of a couple of degrees Fahrenheit.Provide evidence to support your claim, and explain your reasoning
Doctors are more concerned about a fever of a few degrees Celsius than a fever of a few degrees Fahrenheit because variations in body temperature are more easily understood and tracked in Celsius, which is the more popular and accurate temperature measure in the medical world.
If the human body temperature were 98.6 C (209.48 F), it would be a life-threatening condition because the temperature is well above the boiling point of water, and proteins in the body would denature, leading to irreversible damage to organs and tissues. In reality, a body temperature of 98.6 degrees Fahrenheit (37 degrees Celsius) is considered normal, while a fever is defined as a temporary increase in body temperature above this level.
Doctors worry more about a fever of a couple of degrees Celsius than a fever of a couple of degrees Fahrenheit because Celsius is the more widely used temperature scale in the medical community, and changes in body temperature are better understood and monitored in Celsius. Additionally, Celsius is a more precise temperature scale than Fahrenheit, with each degree Celsius representing a smaller change in temperature than each degree Fahrenheit. For example, a fever of 38.5 degrees Celsius (101.3 degrees Fahrenheit) is a more significant increase in body temperature than a fever of 100.4 degrees Fahrenheit, which is only 1.8 degrees Fahrenheit above normal.
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Use Kepler’s third law to calculate the orbital radius, in astronomical units, of an imaginary planet orbiting the Sun with an orbital period of 46.00 years. Round your answer to two decimal places.
Please provide the correct answer in AU
The orbital radius of the imaginary planet orbiting the Sun with an orbital period of 46.00 years is 173.13 AU.
Kepler's third law gives us a relation between the period (T) of a planet's orbit and its average distance (r) from the Sun. It is given as:T² = (4π²r³) / GM
where T is the orbital period, G is the gravitational constant, M is the mass of the Sun, and r is the average distance of the planet from the Sun.
In order to calculate the orbital radius of an imaginary planet orbiting the Sun with an orbital period of 46.00 years using Kepler's third law, we need to use the above formula.
Given, Orbital period (T) = 46.00 years
We know that the mass of the sun (M) = 1.989 x 10^30 kg, and the gravitational constant (G) = 6.674 × 10^-11 N m²/kg².
Substituting these values in the formula:
T² = (4π²r³) / GMr³ = (T²GM) / (4π²)r = [T²GM / (4π²)]^(1/3)
where r is the average distance of the planet from the Sun, in meters.
The answer needs to be rounded to two decimal places.
Using the given values and substituting them in the formula above, we get:
r = [(46.00 years)² × (6.674 × 10^-11 N m²/kg²) × (1.989 x 10^30 kg)] / (4π²)r = 25932495654260.17 meters
r = 25932495654260.17 / 1.496 × 10^11 (1 AU = 1.496 × 10^11 meters)r = 173.13 AU
Rounded to two decimal places, the answer is 173.13 AU.
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A wave has a frequency of 900 Hz and a wavelength of 200 m. At what speed is this wave traveling?
Answer:
The velocity of the wave is, v = 180,000 m/s
Explanation:
Given data,
The frequency of the wave, f = 900 Hz
The wavelength of the wave, λ = 200 m
The formula for the speed of the wave when the frequency and wavelength are known,
v = λ x f
Substituting the given values in the above equation,
v = 200 m x 900 Hz
v = 180000 m/s
Hence, the velocity of the wave is, v = 180,000 m/s
An object of known mass that can be used to establish uncertainty in measurements made with a balance is best described as a.
Answer:
standard
Explanation:
we sometimes use weights of known mass to balance with an object of unknown mass to determine that objects weight.
A 11,600 kg railroad car travels along on a level friction less track with a constant speed of 18.0 m/s. A 3,750 kg load, initially at rest is dropped onto the car. What will the car's new speed be?
what is unit of pressure?why is it called a derived unit ? give reasons
pascal is the unit of pressure
The units of pressure is called derived units because it is simply derived from base unit which is distance and a derived unit which is force, which is derived from acceleration, a derived unit as well, and mass, a base unit. As we all know, work is defined as the force x distance. Thus making work a derived unit.Jun 23, 2020
suppose the gravitational force between two massive spheres is 10 n. if the distance between the spheres is cut in half, what is the force between the masses?
If the gravitational force between two massive spheres is 10 n and if the distance between the spheres is cut in half, the force between the masses is 40 N.
The gravitational force between two massive spheres can be calculated using the formula:
F = G *\((m_1 * m_2) / r^2\)
where F is the gravitational force between the spheres, G is the gravitational constant, \(m_1\) and \(m_2\) are the masses of the two spheres, and r is the distance between the centers of the two spheres.
If the distance between the two spheres is halved, the new distance between them is r/2.
Using the formula above, the new gravitational force between the spheres is:
F' = G * \((m_1 * m_2) / (r/2)^2\)
F' = G *\((m_1 * m_2) / (1/4)r^2\)
F' = 4 * G * \((m_1 * m_2) / r^2\)
Therefore, if the distance between the two massive spheres is cut in half, the gravitational force between the spheres increases by a factor of 4.
In this case, the new gravitational force between the spheres is 40 N.
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What happens when the two waves meet?
A.
They superimpose and remain at the same amplitude.
B.
They experience destructive interference and cancel each other out.
C.
They experience constructive interference and have twice the amplitude.
D.
They superimpose and have half of their original amplitude.
when two or more waves meet, they interact with other. The intersection of waves with other waves is called wave interference. wave interference may occur when two waves that are traveling I opposite directions meet. the two waves pass through each other, and this affects their amplitude
7. What voltage is required to move 6A through 10?
Answer:
60V
Explanation:
Given parameters:
Current = 6A
Resistance = 10ohms
Unknown:
Voltage = ?
Solution:
From ohms law we know that:
V = IR
V is the voltage
I is the current
R is the resistance
V = 6 x 10 = 60V
betelgeuse, an m-class supergiant in the constellation orion, is off of the main sequence in its life cycle. what is it most likely fusing in its core?
Betelgeuse is currently at the stage of its life known as a red supergiant. In the final stage of their stellar lifetimes, red supergiants are dying stars.
How did Betelgeuse get the role of the main character?It is thought that an O-type main-sequence star gave rise to Betelgeuse. Betelgeuse is a red supergiant, which is an old star that no longer has much hydrogen or fuel left in its core. Betelgeuse is thought to have originated approximately 10 million years ago as a result of gravitational pull, gas, and dust.
When Betelgeuse erupts, what will happen to Earth?When Betelgeuse does explode, it will be too far away for it to affect, much less destroy, life on Earth.
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Which level instruments operate on the principle of generating a signal and then measuring the time required for the signal to reflect off the process fluid back to the transmitter
One of the most crucial devices for electronics and communication is the signal generator. For several reasons, including testing, debugging, and designing, it is utilized to produce various types of signals and frequencies.
What instruments operate principle of generating a signal?Engineers create electronic signals using signal generators, which can be analogue or digital, to test circuit designs. Signal generators come in a wide variety of forms with various characteristics and uses. The most typical signal generator kinds and their distinctive qualities are listed below.
Therefore, radar level instruments operate on the principle of generating a signal and then measuring the time required for the signal to reflect off the process fluid back to the transmitter.
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What cause sound seismic and electromagnetic waves to transmit energy through different mediums
Answer:
Explanation:
Sound, seismic, and electromagnetic waves transmit energy through different mediums due to the motion of particles in the medium.
Sound waves transmit energy through the vibration of particles in a solid, liquid, or gas. The energy is transferred from particle to particle as the wave travels through the medium.
Seismic waves are created by the sudden release of energy from earthquakes, volcanic eruptions, or other geological events. These waves travel through the Earth's solid mantle and crust, transmitting energy through the vibration of particles in the rock.
Electromagnetic waves are a type of wave that does not require a medium to travel through. They are created by the motion of charged particles, such as electrons, and can travel through a vacuum, such as space. Electromagnetic waves transfer energy through the oscillation of electric and magnetic fields.
coma Narrows Bridge across the Puget Sound collapsed. The bridge was a suspension bridge. The wind blowing through the narrows matched the natural frequency of the bridge. This resulted in a large movement of roadway, which eventually caused the bridge to fail. What characteristic of waves caused the bridge to collapse
Answer:
amplitude
Explanation:
Amplitude is the characteristic of waves which caused the bridge to collapse. Amplitude of a wave is the maximum amount of displacement of a particle occurs in the medium from its rest position. When the frequency of a wave reaches the natural frequency of the bridge, the oscillation of the bridge produce an amplitude where it causing the destruction of the bridge which is called Resonance. So we can say that amplitude is the characteristic of waves which is responsible for the collapse of the bridge.
Answer: C.interference, because constructive interference occurred when the wind frequency matched the natural frequency of the bridge
Explanation:
ability of the muscles to function effectively and efficiently without undue fatigue
Physical fitness can be defined as the “ability to carry out daily tasks with vigor and alertness, without undue fatigue, and with ample energy to enjoy leisure-time pursuits and to meet unforeseen emergencies” (Park 1989).
why does the moon rise approximately 50 minutes later each night
Answer:
daylight savings time
Explanation:
it's because the weather changes
the focal point of a lens is select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a the place where it sends all light rays. b the center of curvature of the lens. c the place where it sends rays that are parallel to the axis. d the place where it sends rays that are off-axis. e the center of the lens.
The focal point of the converging lens is this location. The diverging rays of light can be followed backwards until they intersect at a location if the light rays diverge (as in a diverging lens).
What does a focal point serve as?
A focus point is the portion of a picture that draws the viewer's attention to the focal point or the area you wish to draw attention to. The outcome will depend on how you handle this.
What does the term "focal length" mean?
The distance between the main foci, often referred to as focal points, and the center of a thin lens in air is known as the focal length. In relation to a converging lens
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An apple is resting on a table. Claire says that there are no forces acting on the apple because it is not moving. Is she right?
Answer:
no
Explanation:
there are forces , even when the apple isnt moving , for example gravity which is keeping the apple on the table
A 150kHz sinusoidal is to be sampled at a frequency, fs = 200kHz. What frequency will be observed when the signal is recovered? What if fs = 50kHz?
For fs = 200kHz, the observed frequency will be 50kHz. For fs = 50kHz, the observed frequency will be 50kHz (aliasing).
When sampling a sinusoidal signal, the highest frequency that can be accurately represented is fs/2 (the Nyquist frequency). If the input signal frequency is higher than fs/2, aliasing occurs and the signal is incorrectly reconstructed.
For fs = 200kHz and a 150kHz input signal, the observed frequency will be 200kHz - 150kHz = 50kHz. This is within the Nyquist frequency and can be accurately reconstructed.
For fs = 50kHz and a 150kHz input signal, the observed frequency will also be 50kHz (50kHz + 50kHz = 100kHz, which is the frequency that is aliased). The signal cannot be accurately reconstructed in this case.
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a woman stands on a scale in a moving elevator. her mass is 66.0 kg, and the combined mass of the elevator and scale is an additional 784 kg. starting from rest, the elevator accelerates upward. during the acceleration, the hoisting cable applies a force of 9030 n. what does the scale read (in n) during the acceleration?
The scale will read 8,996 N during the acceleration.
The force applied to the woman by the scale is the sum of her weight and the weight of the elevator and scale (66.0 kg + 784 kg = 850.0 kg). This can be calculated using the equation
Force = Mass x Acceleration (F = ma).
The acceleration is given by the force applied (9030 N) divided by the total mass (850.0 kg), which gives a result of 10.6 m/s2.
We then multiply this acceleration by the mass of the woman (66.0 kg) to get the force applied to the woman by the scale, which is 696 N.
We then add this to the weight of the elevator and scale (784 kg) to get the total force that the scale reads, which is 8,996 N.
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A spherical drop of water carrying a charge of 41pC has a potential of 570 V at its surface (with V=0 at infinity). (a) What is the radius of the drop? (b) If two such drops of the same charge and radius combine to form a single spherical drop, what is the potential at the surface of the new drop? (a) Number Units (b) Number Units
A spherical drop of water carrying a charge of 41pC has a potential of 570 V at its surface (with V=0 at infinity) (a) The radius of the drop is approximately 5.88 micrometers (μm).
(b) The potential at the surface of the new drop formed by combining two drops of the same charge and radius is approximately 1140 V.
(a) To find the radius of the drop, we can use the formula for the potential of a charged sphere, which is given by V = (k * Q) / r, where V is the potential, k is the electrostatic constant, Q is the charge, and r is the radius of the sphere. Rearranging the formula to solve for the radius, we have r = (k * Q) / V. Plugging in the given values of Q = 41 pC (pico coulombs) and V = 570 V, and using the value of k = 8.99 × 10^9 Nm^2/C^2, we can calculate the radius to be approximately 5.88 μm.
(b) When two drops combine to form a single spherical drop, the total charge remains the same. Therefore, the potential at the surface of the new drop can be calculated using the same formula as before, but with the combined charge. Since each drop has the same charge and radius, the combined charge will be 2 times the original charge. Plugging in Q = 82 pC (2 * 41 pC) and using the given value of V = 570 V, we can calculate the potential at the surface of the new drop to be approximately 1140 V.
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A series of questions and choices that help to identify and place organisms by similarity in structures is called
Question 3 options:
a dichotomous key
binomial nomenclature
Linnean system of classification
fossil record
Answer:
dichotomous key
Explanation:
because it is
A football of mass 1 kg is thrown at an initial velocity of 7 m/s at an angle of 33 degrees with respect to the horizontal. Please determine the maximum height the football can reach
The football can achieve a maximum height of 0.7415 m when thrown with a velocity of 7 m/s at an angle of 33 degrees with respect to the horizontal axis.
Let's find the initial velocity of the football on the vertical axis,
the velocity of football in the vertical axis, u = 7 sin(33)
u =7 (0.5446)
u = 3.8124
Now let's find the maximum height that can be achieved by the football.
The maximum velocity of the football will be zero, so the final velocity is zero.
Using equation,
\(v^2-u^2 = 2ah\)
we can find the height where h is the maximum height that can be achieved.
Substituting all the values in the above equation, we get
0 - 14.5343 = - 2(9.8)h
This negative depicts that acceleration is in the opposite direction of the initial velocity.
14.5343 = 19.6 h
h = 0.7415
Hence, the football can achieve a maximum height of 0.7415 m when thrown with a velocity of 7 m/s at an angle of 33 degrees with respect to the horizontal axis.
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