You are at the top of the empire state building on the 102nd floor, which is located 373 m above the ground, when your favorite superhero flies over the building parallel to the ground at 70.0% the speed of light. you have never seen your favorite superhero in real life. out of curiosity you calculate her height to be 1.52 . if the superhero landed next to you, how tall would she be when standing?
1.90 m
1.52 m
1.20 m
1.22 m
what is the height of the 102nd floor of the empire state building as measured by the superhero while flying above it?
373 m
298 m
236 m
239 m

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

What is the momentum of a 2 kg object moving at 15 meters per second

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.