Explanation:
it's generally proven that the formula for kinetic energy is k. e = ½mv²
= ½×2×3
=3
Answer:the average kinetic energy is directly proportional to the temperature . When water freezes, the temperature decreases and therefore, the average kinetic energy will also decreases as well.
Explanation:
When the same masses are heated by the same amount copper will heat up
the fastest. Copper is a good conductor of heat that is why it easily heats up.
Gold is not a good conductor of heat because of its stable properties.
Answer:
The speed of the plank is 81.68 m/s
Explanation:
Given that,
Speed of bullet = 152 m/s
Speed of wood = 128 m/s
Speed of another bullet = 97 m/s
We need to calculate the speed of plank
Using conservation of momentum
Where,
u = initial velocity
v = final velocity
....(I)
....(II)
From equation(I) and equation(II)
Hence, The speed of the plank is 81.68 m/s