Earth: 9.8 N/kg Mercury: 3.7 N/kg
Venus: 8.9 N/kg
Neptune: 11.7 N/kg
Jupiter: 24.9 N/kg

3. If the mass of a rock is 5 kg, what is its weight on Jupiter?
4. If the mass of an elephant is 5,678 kg on Earth, what is its mass on Venus?
5. If a book has a mass of 168 g, what is its weight on Earth? (You need mass in kg!)
6. If a dog has a mass of 12 kg, what is its weight on Neptune?
7. If a metal block has a mass of 22 kg, what is its weight on Mercury?

An apple is falling from a tree. disregarding air resistance, which diagram shows the free-body diagram of the force or forces acting on the apple?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?