The formula for Kinetic Energy is:
KE = 1/2mv^2
So, KE = 1/2(500)(10)^2
KE = 1/2(500)(100)
KE = 1/2(50000)
KE = 25,000 J
Answer:
C. 1.3 x 10-11 F
I took the test and got this correct, hope this helps
Explanation:
Answer:
<u>because of the doppler effect</u>
Explanation:
<em>Remember</em>, the doppler effect refers to the changes in sound (frequency of sound) observed by a person who is in a position relative to the wave source.
In this example, we notice as the train comes closer to the boy, the sound becomes louder also increasing the pitch slightly, the doppler effect sets in when the train passes the boy because the boy notices a decrease in the pitch of the moving train.
We learn from the change in the observed sound of the train that the frequency of the sound is determined by the distance of the observer from the wave source.
In other words, the closer the source of the sound to the observer; the faster it travels to the observer, however, the farther it is; the lesser it is; the greater the sound heard.
Answer:
Work done by gravitational force = 0 joule
Explanation:
Work done is given by the relation
W = F x S joule
Where, F - the force applied in the form of push or pull
S - displacement caused by the force
If a force is acting on a body and it doesn't cause any displacement, then work done will be zero.
Gravitational force acts on the body even if the body is at rest.
<em>Work done by the gravitational is applicable only if there is some vertical component of motion involved.</em>
In this case, some amount of work is done to move the body from point A to B.But, the body is displaced in the horizontal direction. No vertical motion is involved.
So, the work done due to gravitational force on a mass is zero joule.