assignment of a helium gas is at pressure p = la tom and- temperature T, = 0.c. If its pressure is dropped to Its Initial pressure when it's volume keep / held Constant: a) Calculate the work done by the gas 6). What is the final temperature of the gas: . C) - What is the Work done by the gas. If its C- volume became twice as initial volume and its return to its Initial temperature.

There is a theory that indicates that dinosaurs became extinct when about 65 million years ago, a large asteroid hit the earth surface. dust caused by this collision blocked the sunlight reaching the earth's surface and many forms of life became extinct due to the cold. fearing this threat, how large the radius of an asteroid should you be looking for if the dangerous asteroid size is approximately the same as the one that killed the dinosaurs? available data suggests that about 18% of that asteroid's mass ended up as a dust spread evenly over earth after eventually settling out of the upper atmosphere. about 0.0180 g/cm^2 of dust, which is chemically different than the earth's rock, covered the earth's surface. typical asteroids have a density of about 1.9 g/cm^3. now that we know the size of the asteroid, how much energy was released during impact, assuming all of it was just the kinetic energy of the asteroid right before the impact?

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?