physical processes that transport energy include group of answer choices radiation conduction convection activation isoenergetic constant speed on a flat surface

The velocity of the first car after the collision is approximately 11.84 m/s.

To determine the velocity of the first car after the collision, we can apply the principle of conservation of momentum. According to this principle, the total momentum before the collision is equal to the total momentum after the collision.

The momentum of an object is calculated as the product of its mass and velocity. Let's denote the velocity of the first car after the collision as v1.

Before the collision:

Momentum of the first car = mass of the first car * velocity of the first car

Momentum of the second car = mass of the second car * velocity of the second car

After the collision:

Total momentum = (mass of the first car + mass of the second car) * velocity of the first car (since they move together after collision)

Using the conservation of momentum, we can set up the equation:

(mass of the first car * velocity of the first car before) + (mass of the second car * velocity of the second car before) = (mass of the first car + mass of the second car) * velocity of the first car after

Substituting the given values:

(487 kg * 19.5 m/s) + (636 kg * 9.0 m/s) = (487 kg + 636 kg) * v1

Solving for v1:

(487 kg * 19.5 m/s) + (636 kg * 9.0 m/s) = (487 kg + 636 kg) * v1

v1 ≈ 11.84 m/s

Therefore, the velocity of the first car after the collision is approximately 11.84 m/s.

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The spring constant for a spring that can store 25J of elastic potential energy when compressed by 7.5 cm is 8.9*10³ N/m.

given,

 energy stored in the  spring = E = 25J

compressed  distance = x = 7.5cm = 0.075m

  E = 1/2 * kx²

  K = 2E/x²

     = 8.9*10³ N/m

The energy that an item retains due to its position in relation to other objects, internal tensions, electric charge, or other reasons is known as potential energy in physics.

Potential energy can take many different forms. Some examples are an object's gravitational potential energy, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field. The joule, denoted by the letter J in the International System of Units (SI), is the unit of energy.

Although it has connections to the Greek philosopher Aristotle's concept of potentiality, the word "potential energy" was first used in the 19th century by the Scottish engineer and scientist William Rankine.

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Answer:

Because the atmosphere is so thin, high wind velocities are needed to move sand and dust.

Answer:

Displacement a combination of distance

Explanation:

I'm not sure eh

Answer:

B) 4 m/s²

Explanation:

\( \boxed{ \sf{ F= m \times a}}\)

Here,

Substituting the respective values for F and m:

==> 220 = 55 × a

==> 220 = 55 × a

dividing the equation by 55:

==> 4 = a

Therefore, an object of 55 kg when pulled across a frictionless surface by a force of 220 N accelerates at 4 (m/s)/s

Answer:

mass of the products

Explanation:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Answer:

sorry I don't understand

Explanation:

please translate it in english

The number of forces acting on the helicopter is 3.

The forces on the system are not balanced

The magnitude of the thrust is 7,112,5 N.

The net force of the helicopter  is 5,912.5 N

The magnitude of the helicopter's acceleration is 1.97 m/s².

The speed of the helicopter is increasing towards to the right.

The number of forces acting on the helicopter is calculated as follows;

The magnitude of the thrust is calculated as;

F = W sinθ

F = (3000 x 9.8 x sin14)

F = 7,112.5 N

The net force of the helicopter  is calculated as follows;

F (net) = drag force + thrust force

F (net) = - 1200 N + 7,112.5 N

F (net) = 5,912.5 N

The acceleration of the helicopter is calculated as follows;

F (net) = ma

where;

a = F (net) / m

a = 5,912.5 / 3000

a = 1.97 m/s²

Thus, since the acceleration of the helicopter is positive, the speed of the system is increasing towards to the right

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The additional force to bring the object into the state of equilibrium is that the resultant is 28 northeast and the equilibrant will be 28  southwest.

Since we considering two vectors with the magnitude, so using the addition of vectors the resultant vector is 28.284 approximately  is 28, so since both the vectors are on the direction of north and east sides,  so the resultant and its  equilibrant is in the direction of northeast and southwest.

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A 20-newton force due north and a 20-newton force due east act concurrently on an object, What additional force is necessary to bring the object into a state of equilibrium?

The lowest frequency heard by the listener is 578.4 Hz and the highest frequency heard is 620.4 Hz. These frequencies are due to the Doppler effect caused by the movement of the whistle in a circle.

We can start by finding the velocity of the whistle as it moves in a circle. This can be found using the formula v = rω, where v is the velocity, r is the radius, and ω is the angular speed. Plugging in the given values, we get:

v = (0.769 m)(16.2 rad/s) = 12.448 m/s

Now, let's think about the sound waves that the whistle is producing. As the whistle moves in a circle, it is constantly emitting sound waves in all directions. However, some of these waves are compressed (higher frequency) and some are stretched out (lower frequency) depending on the direction of their motion relative to the listener.

To find the highest and lowest frequencies heard by a listener at rest with respect to the center of the circle, we need to consider the Doppler effect. This is the phenomenon where the frequency of a sound wave appears to change for an observer if the source of the sound is moving relative to the observer.

The formula for the Doppler effect is:

f' = f (v + v_obs) / (v + v_source)

where f is the frequency of the sound wave, f' is the perceived frequency, v is the velocity of the sound wave (which is the speed of sound in air, given as 343 m/s), v_obs is the velocity of the observer (which is 0 since they are at rest), and v_source is the velocity of the source (which is the velocity of the whistle, found earlier as 12.448 m/s).


(a) The lowest frequency heard will occur when the whistle is moving directly away from the listener. In this case, the sound waves will be stretched out (lower frequency) due to the Doppler effect. The velocity of the sound wave relative to the listener is v - v_obs = 343 m/s. The velocity of the source relative to the listener is v_source - v_obs = 12.448 m/s. Plugging these values into the Doppler formula, we get:

f' = f (v + v_obs) / (v + v_source)
f' = 587 Hz (343 m/s) / (343 m/s + 12.448 m/s)
f' = 578.4 Hz

So the lowest frequency heard by the listener is 578.4 Hz.

(b) The highest frequency heard will occur when the whistle is moving directly towards the listener. In this case, the sound waves will be compressed (higher frequency) due to the Doppler effect. The velocity of the sound wave relative to the listener is v + v_obs = 343 m/s. The velocity of the source relative to the listener is v_source + v_obs = 12.448 m/s. Plugging these values into the Doppler formula, we get:

f' = f (v + v_obs) / (v + v_source)
f' = 587 Hz (343 m/s + 0 m/s) / (343 m/s - 12.448 m/s)
f' = 620.4 Hz

So the highest frequency heard by the listener is 620.4 Hz.

Lowest frequency heard by the listener is 578.4 Hz and the highest frequency heard is 620.4 Hz. These frequencies are due to the Doppler effect caused by the movement of the whistle in a circle.

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Answer:

5238747643782 mph

Explanation:

i assure u it is

Answer:

He traveled 9km

Explanation:

To do this problem you need to use the equation which is Speed= distance/time and this problem gives you the speed which is 18 km/h and it gives you the time 1/2 hour so you write the equation 18= d/ 1/2 which his distance is 9km

Answer:

I believe its C

Explanation:

Answer:

8.25 m/s 14. W of S

Explanation:

The best way to solve this problem is to perform a vector scheme, as vectors can be added We can perform a vector sum to find the resulting velocity by means of the Pythagorean theorem.

In the attached diagram we can see the scheme of the vectors as well as the solution of the problem.

\(v= \sqrt{8^{2}+2^{2} } \\v=\sqrt{68} \\v=8.24[m/s]\\\\the angle\\tan(\alpha )=\frac{2}{8} \\\alpha =14.03\)

Note: The angle measured as West from South, means the angle measured from south to West.

1m² = 10000cm²

1m² = 1000000mm²

1m² = 1e-6km²

Answer:

825 Joules of energy would be correct if my math is right.

Explanation:

\(\mathrm{A\ capacitor\ works\ on\ the\ principle\ that\ the\ capacitance\ of\ a \ conductor\ shows}\\\mathrm{\ increase\ when\ an\ earthed\ conductor\ is\ brought\ near\ it.}\\\mathrm{Hence,\ a\ capacitor\ has\ two\ plates\ separated\ by\ a \ distance\ having\ equal\ and}\\\mathrm{opposite\ charges.}\)

All of the below contribute to an increase in carbon levels except D. Photosynthesis.

Carbon is an essential component of life on earth, and its role is crucial in maintaining the balance in the atmosphere. However, increased carbon levels, mainly carbon dioxide (CO₂), pose a threat to our planet and all the living beings on it. Burning fossil fuels, deforestation, and industrial processes are the major contributors to the increased levels of CO₂ in the atmosphere. Hence, humans play a significant role in climate change. However, the process of photosynthesis can reduce the carbon levels in the atmosphere as it involves absorbing CO₂ from the air and converting it into oxygen (O₂) and glucose.

Breathing is the process where humans and animals take in oxygen and release CO₂ into the atmosphere. Although breathing increases the levels of CO₂ in the atmosphere, it is not considered a significant contributor to the increased carbon levels. Decay of vegetation contributes to the increase in carbon levels as it releases CO₂ into the atmosphere during the process. Petrol burning releases CO₂ into the atmosphere and contributes significantly to climate change. Therefore, the correct answer to this question is option D, photosynthesis

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The angular speed of the passenger in radians per second is 0.126 rad/s.

The given parameters;

The angular speed of the passenger in radians per second is calculated as follows;

\(\omega = \frac{2\pi N}{T} \\\\\omega = \frac{2\pi \times 12 \ rad}{600 \ s} \\\\\omega = 0.126 \ rad/s\)

Thus, the angular speed of the passenger in radians per second is 0.126 rad/s.

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Hi! I'd be happy to help you with your question. To determine the rate law for the overall reaction, we need to first analyze the given reaction steps: Step 1: a → b + c (slow) Step 2: c + d → e (fast) Overall: a + d → b + e Now let's follow these steps to find the rate law: 1. Identify the rate-determining step: The slow step is the rate-determining step, which in this case is Step 1. 2. Write the rate law for the rate-determining step: Since Step 1 involves the reactant 'a', the rate law for this step will be: Rate₁ = k₁[a], where k₁ is the rate constant for Step 1. 3. Find the overall rate law: Since the rate-determining step is Step 1, the overall rate law will also be based on this step. Therefore, the overall rate law is: Rate = k[a], where k is the overall rate constant. In conclusion, the rate law for the overall reaction is: Rate = k[a].

Provides an analysis of chemical kinematics, namely the overall reaction rate or rate-determining step. In chemical kinetics, the overall reaction rate is sometimes determined roughly by the slowest step, known as the rate-determining or rate-limiting step. I have a definition that might help further on this matter. A reaction rate constant or reaction rate coefficient, k, measures the rate of a chemical reaction. For a reaction between reactants A and B to give the product C a A + b B → c C the reaction rate sometimes has the equation: {\displaystyle r=k(T)[\mathrm {A} ]^{m}[\mathrm { B} ]^{n}}.

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ANSWER

EXPLANATION

Parameters given:

Speed of electron, v = 4.10 * 10^3 m/s

Magnetic field, B = 1.45 T

Magnetic force, F = 1.40 * 10^(-16) N

To find the angle that the velocity of the electron makes with the magnetic field, apply the formula for magnetic force:

where θ = angle

q = electric charge = 1.6 * 10^(-19) C

Make θ the subject of the formula:

Therefore, the angle that the velocity makes is:

To find the second angle, subtract the angle from 180 degrees:

The angles are:

Answer:

Moderate temperatures

Explanation:

Water came before life and tides. Gravity is irrelevant.

A modifier is a word or phrase that provides additional information, clarification, or description about another element in a sentence.

Modifiers can be adjectives, adverbs, or phrases, and they typically serve to specify, quantify, or otherwise refine the meaning of the words they modify. Adjectives usually modify nouns, while adverbs modify verbs, adjectives, or other adverbs.

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The apple will fall in 0.00014 seconds

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematics equations are a set of equations that can derive an unknown aspect of a body’s motion if the other aspects are provided.

u = 5 m/h = 0.00139 m/s

using kinematic equation

v = u + at

v = final velocity = 0

g = acceleration due to gravity

t = time = ?

using

v = u - g*t

0 = 0.00139  - 9.8 t

t = 0.00139 / 9.8  = 0.00014 seconds

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The calculation of distance required for the police officer to overtake vehicle A is done as follows:First, it is necessary to convert the velocity of vehicle A to meters per second, since the acceleration of the police car is given in terms of meters per second squared.

vA = 120 km/hr

= 33.33 m/sThe police car is accelerating at a rate of 5 m/s2. It is known that the police car reaches a final velocity of 140 km/hr = 38.89 m/s. It is also known that the two vehicles meet at the time it takes for the police car to overtake vehicle A.Let's call this time t.

The distance travelled by vehicle A in time t is dA = vA × t. The distance travelled by the police car in time t is dP

= (1/2)at2 + v0t, where v0 is the initial velocity of the police car. At the instant the two vehicles are side by side, the distances travelled by both are the same. So: dA = dPvA × t

= (1/2)at2 + v0tv0

= 0 (the initial velocity of the police car is zero)

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a) The average annual evaporation from the catchment is approximately 180.29 mm/year.

b) The exact value of evapotranspiration from the irrigated area cannot be calculated due to missing information.

a) Average annual evaporation from the catchment in mm/year:

First, we calculate the total annual rainfall that is collected by the catchment area:

800,000,000 m² × 0.2 m = 160,000,000 m³/year

Since this is the only source of water for the catchment, the total amount of water available to the catchment area per year will be 160,000,000 m³/year.

We know that the average annual discharge at the outlet of a catchment is 0.5 m³/s, and since there are 31,536,000 seconds in a year, we can calculate the total volume of water that is discharged per year:

0.5 m³/s × 31,536,000 s = 15,768,000 m³/year

So, the total volume of water that is lost through evaporation per year will be:

160,000,000 m³/year - 15,768,000 m³/year = 144,232,000 m³/year

To convert this into millimeters, we need to divide this value by the area of the catchment in square meters, and then multiply by 1000 (since 1 m = 1000 mm):

144,232,000 m³/year ÷ 800,000,000 m² × 1000 mm/m = 180.29 mm/year

Therefore, the average annual evaporation from the catchment is approximately 180.29 mm/year.

b) Evapotranspiration from the irrigated area in mm/year:

Since we know that the size of the irrigated area is 10 km² = 10,000,000 m², we can calculate the total volume of water that is used for irrigation each year by multiplying this area by the amount of discharge that is lost as a result of the irrigation project:

10,000,000 m² × (0.5 m³/s - 0.175 m³/s) × 31,536,000 s/year = 4,422,480,000 m³/year

To calculate the amount of water that is lost through evapotranspiration from the irrigated area, we need to know the crop coefficient and the reference evapotranspiration (ET0) for the area. However, since this information is not provided in the question, we cannot calculate the exact value of evapotranspiration from the irrigated area.

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Answer: The motions shifts.

As the frequency of a wave decreases, the wavelength increases, and the energy decreases.

The wavelength and energy of a wave are inversely proportional, meaning that as one increases, the other decreases, and vice versa.

In the case of a wave, as the frequency decreases, the wavelength increases. This is ecause the speed of a wave is constant, and it is equal to the frequency multiplied by the wavelength (v = fλ). As the frequency decreases, the wavelength must increase in order to keep the product (v) constant.

At the same time, as the frequency decreases, the energy of the wave decreases as well. This is because the energy of a wave is proportional to the square of its frequency (E ∝ f^2). As the frequency decreases, the energy decreases in proportion to the square of the decrease in frequency.

Therefore, as the frequency of a wave decreases, the wavelength increases, and the energy decreases.

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