a photon emitted by an excited atom has an energy of 5 ev. what is its frequency?

Answers

Answer 1

The frequency of a photon with an energy of 5 eV is approximately 1.20 × 10^15 Hz.

The energy of a photon can be calculated using the equation:

E = hf

where:

E = energy of the photon

h = Planck's constant (approximately 4.135667696 × 10^-15 eV s)

f = frequency of the photon

We need to rearrange the equation to solve for frequency (f):

f = E / h

Substituting the given values:

E = 5 eV

h = 4.135667696 × 10^-15 eV s

f = 5 eV / (4.135667696 × 10^-15 eV s)

Dividing the energy by Planck's constant, we find:

f ≈ 1.20 × 10^15 Hz

The frequency of a photon emitted by an excited atom with an energy of 5 eV is approximately 1.20 × 10^15 Hz.

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Related Questions

Aspirin is an effective and widely used pain reliever. identify the functional group circled. ester aldehyde carboxylic acid carbonyl ketone

Answers

The functional group circled in the term "aspirin" is the carboxylic acid group.

Aspirin, also known as acetylsalicylic acid (ASA)), is a nonsteroidal anti-inflammatory drug (NSAID) used to reduce pain, fever, and/or inflammation and as an antithrombotic. Specific inflammatory conditions that aspirin is used to treat include Kawasaki disease, pericarditis, and rheumatic fever.

Aspirin can also have very serious side effects, such as bleeding in the brain or stomach or kidney failure. A rare side effect of daily low-dose aspirin is hemorrhagic stroke. Aspirin can help prevent and treat a range of health issues, but people under 18 should not take it without medical guidance.

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what is mechanical advantage??

Answers

Answer:  a measure of the ratio of output force to input force in a system, used to analyze the forces in simple machines like levers and pulleys.

Explanation:

Answer: the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine
Explanation:
a measure of the ratio of output force to input force in a system

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an electrical circuit in which the value of resistance is equal to (6 ohms) and the intensity of the current passing through it is (3 amps) the voltage difference between its two is equal to?

Answers

Answer:

Voltage difference V = 18 volt

Explanation:

Given:

Resistance R = 6 ohms

Current charge I = 3 amps

Find:

Voltage difference V

Computation:

Voltage difference V = [Current charge][Resistance]

Voltage difference V = 6 x 3

Voltage difference V = 18 volt

the boy in the image below pushes a box across the floor by exerting a force of 140. n at an angle of 35.0o below the horizontal. what is the magnitude of the vertical component of the applied force (fay) ?

Answers

The boy pushes a box across the floor by exerting a force of 140 N at an angle of 35° below the horizontal. The magnitude of vertical component of the applied force is 80.36 N.

In two dimensional system, a force can be resolved into two mutually perpendicular components whose vector sum will be equal to the applied force. The resolved components are usually taken to be parallel to x and y axes.

A single force can be broken down into two component forces at right angles to each other.

Given that, Force = 140 N

θ = 35°

The magnitude of vertical component of force is F sin θ = 140* sin 35° = 140* 0.574 = 80.36 N

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Theo mixes cake batter and places it in the oven at 350°F for 45 minutes. Explain what type of reaction baking a cake represents in terms of energy.

Answers

Answer:

Baking a cake requires heat to be applied to the batter in order for it to cook and chemically change into cake. The energy or heat applied is absorbed by the ingredients, so this represents an endothermic reaction.

Explanation:

that's the sample answer, hope it helps

The batter needs to be heated in order to cook and chemically transform into a cake when it is baked. An endothermic reaction is taking place because the energy or heat applied is being absorbed by the constituents.

What is energy?

The quantitative characteristic that is transferred to a body or a physical system in physics is referred to as energy. It manifests itself as heat and light, as well as the act of doing work. Energy is a resource that is conserved; it can only be changed from one form to another and cannot be created or destroyed, according to the law of conservation of energy. The SI unit of energy measurement is the joule (J).

According to the question, there are various types of reactions two of which are endothermic reactions and exothermic reactions.

In an endothermic lot of energy is absorbed and in opposition to the exothermic reaction lot of energy is released.

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Any planet that you have NOT crossed out above should have a Magnetic Field. Circle any planet above that yoa have NOT crossed out. Do the data in Table 7.3 support your choice(s)? lio 1 No (circle one) TUTORIAL REVIEW QUESTIONS 1. What is (are) the main factor(s) that affect(s) the amount and duration of geological activity on a terrestrial planet? 2. What is (are) the main factor(s) that affect(s) atmospheric conditions on a terrestrial planet? 3. The moons of the giant Jovian planets are small rocky-metal bodies that are, at the largest, about the size of Mercury (but most are smaller). Based on this and what you have learned about the factors that affect geologic activity and atmospheres on similar objects (Terrestrial planets), what geologic and atmospheric conditions would you expect to find on the surface of a typical Jovian moon?

Answers

The main factor that affects the amount and duration of geological activity on a terrestrial planet is its internal heat. This heat is generated through various processes such as radioactive decay and residual heat from planetary formation.

The presence of a molten core and active mantle circulation contributes to geological activity, including tectonic plate movements, volcanic eruptions, and mountain building. Other factors like the planet's size, composition, and distance from the Sun can also influence geological activity to some extent.

The main factors that affect atmospheric conditions on a terrestrial planet are its distance from the Sun, the composition of its atmosphere, and the presence of greenhouse gases. The proximity to the Sun determines the amount of solar energy received, which affects temperature and weather patterns. The composition of the atmosphere, including the presence of gases like oxygen, nitrogen, carbon dioxide, and water vapor, determines the planet's climate and the ability to support life. Greenhouse gases trap heat in the atmosphere, contributing to the greenhouse effect and influencing temperature regulation.

Based on what we know about the factors that affect geologic activity and atmospheres on terrestrial planets, we can expect that typical Jovian moons, being small rocky-metal bodies, would have limited geological activity and thin atmospheres, if any. The smaller size of these moons compared to terrestrial planets means that they have a lower heat-producing capability and less internal energy. Additionally, their lower gravitational forces make it challenging to retain substantial atmospheres. While some Jovian moons may have evidence of geological activity, such as cryovolcanism or tidal heating, they generally exhibit less dynamic geologic and atmospheric conditions compared to larger terrestrial planets.

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7) when a fixed amount of ideal gas goes through an adiabatic expansion, a) its internal (thermal) energy does not change. b) the gas does no work. c) no heat enters or leaves the gas. d) its temperature cannot change. e) its pressure must increase.

Answers

When a fixed quantity of an ideal gas undergoes an adiabatic expansion, its internal (thermal) energy does not change, the gas does no work, no heat enters or leaves the gas, its temperature cannot change and its pressure must increase.

This is because in an adiabatic process there is no transfer of thermal energy into or out of the system, so the total energy remains the same and the work done is equal to the change in internal energy. This means that for an adiabatic process, the temperature does not change, but the pressure does increase due to the decrease in volume.

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What is called in the interior of the Earth can be classified as primordial and radiogenic heat?.

Answers

Primordial heat and radiogenic heat are the two main sources of the Earth's interior heat. The disintegration of radioactive materials deep below the Earth's interior produces radiogenic heat.

The Earth's mantle and core contain these elements, including uranium, thorium, and potassium. These elements produce heat when they decompose, which is energy. The heat produced by the Earth since its origin 4.5 billion years ago is known as primordial heat. The energy generated during the Earth's birth as a result of the condensation of gas and dust from the solar nebula is what causes this heat. The heat generated by this process is still present in the Earth's interior and is what causes the Earth's surface to move.

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A 10m/s
B 12m/s
C 14m/s
D 19m/s

A 10m/sB 12m/sC 14m/sD 19m/s

Answers

Answer:

C

Explanation:

Apply the uniform acceleration equation \(v^{2} = u^{2} +2as\)

v: Final velocity (When the stone reaches its maximum height)

u: Initial velocity (The velocity of the stone at the instance when it is thrown)

a: Acceleration due to gravity

s: Displacement of the stone

Take \(v=0m/s\) since the stone is momentarily at rest when it reaches its maximum height.

Take \(a = -9.81 m/s^2\), the negative sign indicates the stone is decelerating due to gravity.

Take \(s=10m\) as stated in the question.

\(0^2=u^2+2(-9.81)(10)\)

\(196.2=u^2\)

\(u=\sqrt{196.2}\)

\(u=14.00714104m/s\)

Therefore, the closest answer is C (\(14m/s\))

In a river of bed width of 600 m and bed slope of 7.5 cm/km, it is found that the bed material just begin to move when the discharge is 120 million m³/day. Assuming the mean velocity to vary with the water depth and slope according to the relation: v = 120 y $2/³, find the bed slope at which the same tractive force on the bed would be produced with a discharge of 365 million m³/day.

Answers

The bed slope required to produce the same tractive force on the bed with a discharge of 365 million m³/day can be determined using the given equation for mean velocity variation.

Bed width (B) = 600 m

Initial discharge (Q1) = 120 million m³/day

Initial bed slope (S1) = 7.5 cm/km

The equation for mean velocity (v) = 120 y^(2/3), where y is the water depth.

To find the bed slope (S2) for a new discharge (Q2) of 365 million m³/day, we need to equate the tractive force on the bed for both scenarios.

The tractive force on the bed can be represented as:

Tractive force =\((Rho * g * S * B * v^2) / (R * D50)\)

where:

Rho is the density of water,

g is the acceleration due to gravity,

S is the bed slope,

B is the bed width,

v is the mean velocity, and

R and D50 are constants.

Since we are comparing two scenarios with the same tractive force, the following equation can be formed:

\((Rho * g * S1 * B * v1^2) / (R * D50) = (Rho * g * S2 * B * v2^2) / (R * D50)\)

Simplifying the equation:

\(S1 * v1^2 = S2 * v2^2\)

Substituting the given values:

\(S_1 * (120 y_1^{(2/3))^2 = S_2 * (120 y_2^{(2/3))^2\)

Rearranging the equation:

\(S_2 = S_1 * (120 y_1^{(2/3)})^2 / (120 y_2^{(2/3)})^2\)

We know that Q = B * v * y, where Q is the discharge. Rearranging this equation gives:

\(v = Q / (B * y)\)

Substituting the values for Q1 and Q2, we have:

\(v1 = 120 million / (B * y1)\)

\(v2 = 365 million / (B * y2)\)

Substituting the expressions for v1 and v2 in the equation from step 7:

\(S_2 = S_1 * (120 y_1^{(2/3)})^2 / (120 y_2^{(2/3)})^2\)

\(= S_1 * (120^2 * y_1^{(4/3)}) / (120^2 * y_2^{(4/3)})\)

\(= S_1 * (y_1^{(4/3)} / y2^{(4/3)})\)

Since the bed material just begins to move when Q = 120 million m³/day, the velocity can be expressed as \(v = v_1 = 120 y1^{(2/3)}.\)

Therefore, the equation for S2 becomes:

\(S_2 = S_1 * (y_1^{(4/3)} / y_2^{(4/3)})\)

=\(S_1 * (120^{(4/3)} * y_1^{(4/3) }/ (120 y_2^{(2/3)})^{(4/3))\)

\(= S_1 * (120^{(4/3)} * y1^{(4/3)} / (120^{(4/3)} * y2^{(4/3)}))\)

\(= S_{1 * (y_1^{(4/3)} / y_2^{(4/3)})\)

Finally, substituting the values for y1 and y2:

\(S_2 = S_1 * (y_1^{(4/3) }/ y_2^{(4/3)})\)

= \(S_1 * (y_1^{(4/3)} / (365 / 120)^{(4/3)})\)

Now, you can substitute the values for y1, and S1, and calculate S2 accordingly.

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where a grounding electrode conductor is installed for an optical network terminal of a premises-powered broadband communications system, what is the minimum-size copper conductor required?

Answers

According to the National Electric Code (NEC), the minimum size of the grounding electrode conductor required for an optical network terminal (ONT) of a premises-powered broadband communications system is 6 AWG copper. This requirement is specified in NEC section 830.100(C).

The size of the grounding electrode conductor may need to be increased based on the specific conditions of the installation, such as the length of the conductor and the resistivity of the soil. It is important to consult a licensed electrician for specific guidance on the installation of grounding systems.

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What energy is directly dependent upon velocity and mass?
A mechanical energy
O B. total energy
C. potential energy
O D. kinetic energy

Answers

Answer:

Kinetic energy

Explanation:

SILVER PACKAGE
The work done in lifting a 10 kg load of bricks to the top of a building 20 m high is (g = 9.8 ms-2
a) 98
b) 200 J
c) 980
d) 1960)​

Answers

U=mgh
U=10*9.8*20
U=1960
Answer is D

A teacher is showing the class an experiment with electric fields. She connects up two plates to a power supply and puts a candle between the plates.
a. What is an electric field
b. How can you tell that the candle flame contains charged particles?
c. The charge on the plate on the left is negative, and the charge on the plate on the right is positive. What is the charge on the particles in the flame?
d. The teacher carefully moves the candle around between the plates. The candle looks the same. What can you say about the size of the electric field between the plates?

Answers

a. Electric field is a region around an electrically charges body in vicinity of which other charges bodies experiences a force. The force is either attractive or repulsive in nature,

b. The distortion of the candle flame tells that the flame contains charged particles.

c. The charge on the particle of flame is negative as well as positive.

d. The size of the field is very big.

a. Charges particle when at rest, produces a physical field around them. When the other charges comes in contact with this field, they feels a force being applied on them. This field around the stationary electric charge is called Electric Field.

b. The charges on the plates are positive and negative on right and left respectively. When the field is applied, the candle flame gets distorted unsymmetrically. The negative particle attracted by the positive plate and vice-versa. Distortion of the flames tells that the flame has charges on it.

c. The unsymmetrical nature of distortion of the flame tells that the it contains both the charges i.e. positive as well as negative.

d. The size of the field can be told by using the magnitude of the field. The flame gets distorted only if the field is very high. Greater the magnitude of field, greater the size of the electric field.

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A worker has to move a 800 kg crate. He pulls with a force of 5,700 N and
the Force of Friction working against him is 900 N. What is the acceleration
of the crate?

Answers

There is a net force being applied in the direction that the crate is being pulled of 5700 N - 900 N = 4800 N.

By Newton's second law, this net force is proportional to the crate's acceleration a by a factor of the crate's mass:

4800 N = (800 kg) a

a = (4800 N) / (800 kg)

a = 6 m/s²

we have that from the Question, it can be said that  the acceleration  of the crate is

a=6m/s^2

From the Question we are told

A worker has to move a 800 kg crate. He pulls with a force of 5,700 N and the Force of Friction working against him is 900 N.

What is the acceleration  of the crate?

Generally the equation for acceleration is mathematically given as

\(a=\frac{F}{m}\\\\Therefore\\\\a=\frac{F}{m}\\\\a=\frac{5700-900}{800}\\\\\)

a=6m/s^2

Therefore

the acceleration  of the crate is

a=6m/s^2

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1. ¿Cuál es el actor clave de del exceso de peso corporal?

Answers

El factor mas importante para el exceso de peso es un  exceso de energía creada por una alimentación excesiva

El peso de un cuerpo es definido por la relación entre la energía requerida para los procesos vitales del cuerpo, sus actividades físicas diarias y la energía suministra en forma de alimentos.

Cuando estos dos parámetros están en balance el peso es estable. Cuando la cantidad de alimentos aumenta o el valor energético de los mismo aumenta se tiene un exceso de energía que el cuerpo almacena en forma de grasa corporal, este el el factor mas importante para el exceso de peso.

En conclusión el factor mas importante para el exceso de peso es un  exceso de energía por una alimentación excesiva

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An object with mass m is attached to the end of a spring with spring constant k, the object is displaced a distance d from equilibrium and released.
What is the speed v of the mass when it returns to the equilibrium position?

Answers

As the mass moves back towards its equilibrium point, its speed is zero.

The motion of the mass attached to the spring can be described using the equation of motion:

\(m(d^2x/dt^2) = -kx\)

where x is the displacement of the mass from its equilibrium position, t is time, m is the mass of the object, and k is the spring constant.

We can solve this differential equation to obtain the displacement x as a function of time:

x(t) = A cos(wt) + B sin(wt)

where A and B are constants that depend on the initial conditions of the system, and w is the angular frequency of the oscillation:

w = sqrt(k/m)

To find the speed of the mass when it returns to the equilibrium position, we need to find the velocity v at that point. The velocity is the derivative of the displacement with respect to time:

v(t) = -Aw sin(wt) + Bw cos(wt)

At the equilibrium position, the displacement x is zero, so we have:

x(0) = A = d

v(0) = Bw = 0

Therefore, the displacement of the mass from its equilibrium position is:

x(t) = d cos(wt)

And the velocity of the mass at the equilibrium position is:

v(0) = -dw sin(0) + 0 = 0

v = 0.

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a tall, open container is full of glycerine. at what depth ℎ below the surface of the glycerine is the pressure 2830 pa greater than atmospheric pressure? the density of glycerine is 1.26×103 kg/m3 .

Answers

The pressure in the glycerin at a depth of 0.2306 meters below the surface where it is 2830 Pa higher than atmospheric pressure.

To determine the depth below the surface of the glycerin at which the pressure is 2830 Pa greater than atmospheric pressure, we can use the concept of pressure in a fluid.

The pressure at a certain depth in a fluid is given by the equation:

P = P₀ + ρgh

Where:

P is the pressure at the depth h,

P₀ is the atmospheric pressure (assumed to be the reference pressure),

ρ is the density of the fluid (glycerin in this case),

g is the acceleration due to gravity (approximately 9.8 m/s²), and

h is the depth below the surface.

We can rearrange the equation to solve for h:

\(h = \frac{P - P_0}{\rho g}\)

Given that the pressure difference is 2830 Pa and the density of glycerine is 1.26×10³ kg/m³, we can substitute the values into the equation:

\(h = \frac{2830\text{ Pa}}{1.26\times 10^3\text{ kg/m}^3 \times 9.8\text{ m/s}^2} = 0.24\text{ m}\)

Calculating the value, we find:

h ≈ 0.2306 meters

Therefore, the depth below the surface of the glycerin at which the pressure is 2830 Pa greater than atmospheric pressure is approximately 0.2306 meters.

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Which best contrasts Newton's and Einstein's ideas?
Newton believed that mass tells objects how to move. Einstein believed that the curvature of space-time tells force how to
move objects.
Newton believed that force tells mass how to move. Einstein believed that the curvature of space-time tells velocity how to
change.
Newton believed that distance tells gravity how much force to exert. Einstein believed that distance tells space-time how to
curve.
Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.

Answers

Answer:

Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.

Explanation:

Isaac Newton believed that bodies on earth had a force of gravity pulling them down as a result of their masses.

Albert Einstein believed that the bodies were not pulled down but were moving around in a circular sphere/manner.

This confirms Newton believing that mass tells gravity how much force to exert and Einstein believing that mass tells space-time how to curve.

Answer:

first one is for the assignment second is for the quiz

Explanation:

Assignment - C.

Quiz - D.

Which best contrasts Newton's and Einstein's ideas?Newton believed that mass tells objects how to move.
Which best contrasts Newton's and Einstein's ideas?Newton believed that mass tells objects how to move.

if the output piston in a hydraulic pump exerts a greater force than one applied to the input piston, is the pressure at the output piston also larger than that at the input piston? explain

Answers

If the output piston in a hydraulic pump exerts a greater force than one applied to the input piston, the pressure at the output piston is also larger than that at the input piston. This is due to the principle of hydraulic pressure.

A hydraulic pump is a mechanical device that is used to increase fluid pressure by means of force from one area to another. This is accomplished by the utilization of Pascal's Law. When a piston of a given area is pushed in by an input force, the same force is transmitted to another piston of a larger area by the pressure exerted by the fluid.The pressure exerted at any point in a fluid-filled container is proportional to the height of the fluid column.

Since the liquid is incompressible, the pressure exerted at one point in the container will be transmitted uniformly to every other point in the container.The pressure exerted by the fluid at the output piston will be greater than the pressure exerted at the input piston when the output piston is larger than the input piston. This implies that the larger the piston's diameter, the greater the force that can be generated.

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an antireflection coating on eyeglasses employs a thin-film coating on the lenses. if the coating is designed properly, what happens to the light reflected from the film?

Answers

Consider a pair of glasses that have what is called an "anti-reflection coating". This is a very thin transparent coating placed on top of an eyeglass lenses.

Electron cloud definition

Answers

ANSWER:

STEP-BY-STEP EXPLANATION:

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What is typically responsible for forming volcanic island chains in the oceans?
A. Shield volcanoes
B. Fissures
Composite volcanoes
Hot spot volcanism

Answers

Hot spot volcanism is responsible for the formation of volcanic island chains in the oceans and is denoted as option D.

What is a Volcano?

This is a rupture in the earth crust thereby giving rise to the release of hot lava, gases etc from below the surface.

The pushing of the lava through the cracks partially melts the plate at a subduction zone thereby forming the volcanic island chains.

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An object with a potential energy of 981 J is placed at a height of 2m. What is the mass of the object?

Answers

Explanation:

Taking g=10m/s²

P.E =mgh

981J= 2×10×m

981J=20m

m. = 981J/20

m. = 49.05kg

a block of unknown mass is attached to a spring of spring constant 7.2 n/m and undergoes simple harmonic motion with an amplitude of 15.1 cm. when the mass is halfway between its equilibrium position and the endpoint, its speed is measured to be 31.3 cm/s. calculate the mass of the block.

Answers

Mass of the block is approximately 0.67kg .Since Antoine Lavoisier discovered that mass is never generated nor destroyed in chemical interactions, the Law of Conservation of Mass has been in existence.

What is Mass?

A thing's mass is how much matter it has. Something will weigh more the more matter it contains. For instance, an elephant weighs more than a mouse because it contains more stuff.

K = 7.2 N/m

Amplitude of oscillation

A = 15.1cm = 0.151m

Half wave, it speed is

V = 31.3cm/s = 0.313m/s

Mass of block

M =?

half of the distance between the equilibrium position and endpoint are

Then,

x = A/2

Where,

A is the amplitude

x is the position of the block

x = A / 2 = 0.151/2

x = 0.0755m

The velocity if the block at any given position is given as

v = ω√(A²—x²)

Then,

ω = v / √(A²—x²)

Where

ω = angular frequency

v = the velocity of the block

force constant is given as

k = mω²

Where,

K =spring constant

ω is angular frequency

Substitute ω into k

Then,

k = m (v / √(A²—x²))²

k = mv² / (A²—x²)

Make m subject of formula want to find m

m = k(A²—x²) / v²

m = 7.2 (0.151²—0.0755²) / 0.313²

m = 7.2× 7.96 × 10^-3 / 0.313²

Mass of the block is approximately 0.67kg

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Calculate the weight in Newtons of a person who has a mass of 69 kg.

Answers

I believe the answer would be 676.65885 rounded to 676.7
just multiply by 10,

69 x 10= 690N

A bicyclist starts from rest and after traveling along a straight path a distance of 25 m reaches a speed of 20 km/h. Determine his acceleration if it is constant. Also, how long does it take to reach the speed of 20 km/h

Answers

The acceleration of the bicyclist is 5.56 m/s2, and it takes 2.27 seconds to reach a speed of 20 km/h. Given,Initial velocity of the bicyclist, u = 0 Distance traveled, s = 25 m Final velocity of the bicyclist, v = 20 km/h = 20 × (5/18) m/s = 100/9 m/s.

We know that acceleration, a = (v - u) / t Where,a is acceleration v is the final velocityu is the initial velocityt is the time taken. Initially the bicyclist was at rest so, u = 0 Now, we can calculate the time taken to reach the speed of 20 km/h (100/9 m/s) using the formula, v = u + atv = u + at => t = (v - u) / at = (100/9 - 0) / aa = (v - u) / t = (100/9) / tRearranging this equation for a, we geta = (v - u) / t = (100/9) / t.

To calculate t, we can use the formula for distance, s = ut + 1/2 at2 Substituting the given values,25 = 0 × t + 1/2 a t2 => t2 = 50/a => t = √(50/a)Substituting the value of t in the expression for acceleration, we geta = (100/9) / √(50/a)On solving, we get a = 5.56 m/s2, which is the acceleration of the bicyclist, and the time taken to reach the speed of 20 km/h is t = 2.27 seconds (approx).

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DO NOW: You are picking up a pendulum (Clay ball on a string) as you pull the pendulum up on one side and let it fall, what types of energy are being used?

Answers

Answer:

The energy used in the pendulum is the initial Potential (Mechanical) Energy, P.E. given to the Clay ball attached to the inclined and extended string by virtue of its elevated position in relation to the rest position (lower state)

The swinging of the pendulum is brought about by the dynamic equilibrium between the initial potential energy, P.E. and the Kinetic Energy, K.E., of the pendulum when it is in motion

The (total) Mechanical Energy, M.E. of the ideal pendulum is constant at all times during the motion of the pendulum and it is given by the following formula;

M.E. = P.E. + K.E.

At the top of the swing, P.E. is maximum and K.E. is zero

Similarly, at the mid (lowest) point in the swing, instantaneously, P.E. is zero and K.E. is maximum

Explanation:

Scenario Three Sue is attacked by a stranger. In self-defense, she throws a brick at the stranger. The brick accidentally hits a baby, injuring the baby. 1. Is Sue guilty of a battery on the baby?

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In order to call a death a homicide, we must find the following facts to be true, a human being who was once alive is now dead, and, the death was caused by the act of another human being.

If a human being who was once alive is now dead, but the death was not caused by the act of another human being, the death is not a homicide. Although it is not ordinarily difficult to determine that a homicide victim was a human being and was once alive, certain circumstances can complicate the determination.

The criminal law does not recognize fetuses as human beings for purposes of criminal homicide (since the death of a fetus is the subject matter of the law of abortion and feticide).

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An object experiences a net zero external unbalanced force is it possible for the object to be.

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Yes, it is possible for an object to experience a net zero external unbalanced force. This means that the forces acting on the object are balanced, resulting in no overall force acting on it. An object can be in a state of rest or continue moving with a constant velocity when it experiences a net zero external unbalanced force.

When an object experiences a net zero external unbalanced force, it can be in different states:
If the object is at rest and experiences a net zero external unbalanced force, it will remain at rest. This occurs when the forces pushing or pulling on the object in different directions cancel each other out. For example, if you push an object with a force of 50 N to the right, and someone else pulls it with an equal force of 50 N to the left, the object will not move.
If the object is in motion and experiences a net zero external unbalanced force, it will continue to move with a constant velocity. This happens when the forces pushing or pulling on the object are equal in magnitude and opposite in direction. For instance, if a car is traveling at a constant speed of 60 km/h and experiences an equal resistance force due to air resistance, the net force on the car is zero, and it will continue moving at the same speed.
It's important to note that even though the net external unbalanced force is zero, the object may still experience internal forces, such as gravitational or frictional forces, which do not cancel out.

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