An insulated piston-cylinder device initially contains 300 l of air at 120 kpa and 17°c. the
air is now heated for 15 minutes by a 200-w resistance heater placed inside the cylinder.
the pressure of the air is maintained constant during this process. determine the entropy
change of the air assuming (15 points)
a. constant specific heats
b. variable specific heats

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Rank the automobiles based on the magnitude of the force needed to stop them, from largest to smallest.2000 kg car going 5m/s500 kg car going 20 m/s1000 kg car going20m/s500 kg car going10m/s1000 kg car going10/s4000 kg car going 5m/s 0 0 603

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.