Aheat engine takes in 6.45 × 103 j of thermal energy from a reservoir at 600 k and returns some of this energy to a reservoir at tl < 600 k .part aif this engine operates at an efficiency of 0.430, what is the maximum value possible for tl?

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?