Two grams of water are sealed in a rigid container; then the water is vaporized by heating. 955 cal of heat is needed for vaporization. What is the change in internal energy of the water? Answer in units of J

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.