The air of the ballon had a mass of 0.00320 kg , the temperature of the air in the ballon decreased bye 215*C , the change in thermal energy of the air in the ballon was 860 J , calculate the specific heat capacity of the air in the ballon ?

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.