When the ball leaves your hand, it has kinetic energy.
Kinetic energy = (1/2) (mass) (speed)²
= (1/2) (20kg) (5 m/sec)²
= 50 joules .
If the ball is not carrying solar panels or a jet engine, then it can
never have any MORE energy than that. And if, as we always
assume, it doesn't suffer any air resistance, then it won't LOSE
any energy. It has 50 joules of energy, permanently or until it hits
something.
If you toss it straight up, then it keeps climbing until it runs out of
kinetic energy. That is, its kinetic energy gets converted to potential
energy as it goes higher and slower. At the top, where it stops
momentarily and has no kinetic energy at all, all the energy it has
is potential energy ... the entire 50 joules you gave it with your toss.
Answer: So if the kinetic energy increases, then the objects thermal energy increases.
Explanation:
Answer:
false, they are more reliable.
Explanation:
i had to do it last year.
The atoms furthest from the nucleus
Answer: 394 Hz
Explanation: this is a question under Doppler effect.
The mathematical equation that defines a Doppler effect is given below as
fo = {c+ vo/ c - vs} × f
Where fo = frequency observed =?
c = speed of sound = 345 m/s
vo = velocity of observer relative to source = 9.5m/s
vs = velocity of source relative to observer = - 9.5 m/s ( the negative sign is as a result of the fact that the observer and the source are moving in opposite direction to each other)
f = frequency of sound by source = 394 Hz.
By substituting the parameters, we have that
fo = {345 + 9.5/ 345 - (-9.5)} × 394
fo = (345 +9.5/ 345 + 9.5) × 394
fo = (354.5/354.5) × 394
fo = 1 × 394 = 394 Hz