A 125 kg Mastiff notices a 23 kg Pomeranian across the dog park. They are 20 meters apart. What is the gravitational force between them?

What happens to the light rays when they hit the specimen?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.