All categories

4 years ago

Which one is an example of kinetic energy

Physics

2 answers:

aleksley [76]4 years ago

6 0

The correct answer is A:) hope it helps :0

balu736 [363]4 years ago

4 0

A type of kinetic energy is A. a rolling ball.

Kinetic energy is energy in motion. None of the other answer choices depict an object in motion; therefore, a rolling ball is the only appropriate answer.

You might be interested in

WILL MARK BRAINLIEST Which of the following graph shows the load with the greater resistance. Explain your answer ( mark brainli

riadik2000 [5.3K]

Answer:

(a) have greater resistance

Explanation:

There is an simple explaination to understand the resistance through a graph. THE HIGHER THE SLOPE OF THE LINE, THE LOWER THE RESISTANCE OF THE RESISTOR.

Remember that and you can do all of the related exercises.

Hope this can hep! :)

5 0

4 years ago

Read 2 more answers

The simplest form of a traveling electromagnetic wave is a plane wave. For a wave traveling in the x direction whose electric fi

e-lub [12.9K]

Answer:

please the answer below

Explanation:

A general electromagnetic plane wave, traveling in the x direction, can be expressed in the form:

$\vec{E}=E_0e^{-i(k\cdot x-\omega t)}\hat{j}\\\\\vec{B}=B_0e^{-i(k\cdot x-\omega t)}\hat{k}\\\\$ (1)

a. amplitudes

from (1) we can observe that E_0 and B_0 are the amplitudes.

2. frequency

By replacing (1) we obtain:

$\vec{E}=E_0e^{-i(k(0)-\omega t)}\hat{j}=E_0[cos\omega t+sin\omega t]\hat{j}$

the wave respond to the followinf physical variables: amplitude, frequency, time and position, as we can see in (1).

hope this helps!!

7 0

3 years ago

How much salt (nacl) is carried by a river flowing at 30.0 m3/s and containing 50.0 mg/l of salt? give your answer in kg/day?

slamgirl [31]

Answer: 129,600kg/day
In this question, you are given the river flow (30m3/s) and the salt concentration. Then to determine the amount of salt carried, you simply need to multiply the flow with concentration. Be careful because the unit in this question is different and need to be converted. The equation would be:

Salt = river flow x salt concentration
Salt = 30m3/s x 1000L/m3 x 50mg/L = 1,500,000mg/second

Then convert it into kg/day
Salt= 1,500,000mg/second x 10^-6 kg/mg x (3600 second/hour) x (24 hour/day)= 129,600kg/day

7 0

3 years ago

What is the meaning of lightyear?

puteri [66]

"Lightyear" is a <em>distance</em> ... specifically, the distance that light travels
through vacuum in one year of 365 days.

It's equivalent to 9.454 x 10^12 kilometers, or 5.875 x 10^12 miles .

7 0

3 years ago

Can y’all please help me with this 3 part question?

klio [65]

Answer:

Vf = 210 [m/s]

Av = 105 [m/s]

y = 2205 [m]

Explanation:

To solve this problem we must use the following formula of kinematics.

$v_{f} =v_{o} +g*t$

where:

Vf = final velocity [m/s]

Vo = initial velocity = 0 (released from the rest)

g = gravity acceleration = 10 [m/s²]

t = time = 21 [s]

Vf = 0 + (10*21)

Vf = 210 [m/s]

Note: The positive sign for the gravity acceleration means that the object is falling in the same direction of the gravity acceleration (downwards)

The average speed is defined as the sum of the final speed plus the initial speed divided by two. (the initial velocity is zero)

Av = (210 + 0)/2

Av = 105 [m/s]

To calculate the distance we must use the following equation of kinematics

$v_{f} ^{2} =v_{o} ^{2} +2*g*y\\\\(210)^{2} = 0 + (2*10*y)$

44100 = 20*y

y = 2205 [m]

5 0

3 years ago