A1-m3 tank containing air @ 25 oc & 500 kpa is connected to another tank containing 5 kg of air at 35 oc & 200 kpa through a valve. the valve is opened and the whole system is brought to thermal equilibrium with the surrounding of 20 oc. determine the volume of the second tank and the final equilibrium pressure of air. take air gas constant (r) = 0.287 kj/(kg. ok)

The 5-kg cylinder is initially at rest when it is placed in contact with the wall b and the rotor at a. if the rotor always maintains a constant clockwise angular velocity v = 6 rad> s, determine the initial angular acceleration of the cylinder. the coefficient of kinetic friction at the contacting surfaces b and c is mk = 0.2.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

The mantle is made up of which structural zones?