46. Larry is 8 years old; his brother Murphy is 4 years old. Their Aunt Erica is taking a super-interesting developmental psychology class which is being taught by a great
professor. Aunt Erica will get extra credit if she administers Piaget's conservation of
liquid task to her nephews. Describe how Aunt Erica would do this, and compare Larry
and Murphy's likely responses. (10 points)

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.