Why is it difficult to prove the law of conservation of mass when a gas is produced?

Compare the kinetic energy of a 20,000-kg truck moving at 110 km/h with that of an 80.0-kg astronaut in orbit moving at 27,500 km/h. For this Practice Exam question, calculate the kinetic energy of the astronaut.

Which has a greater momentum: a heavy truck at rest or a moving skateboard?

After an oil spill off the California coast, the Ladies' Aide Society of Cedar Rapids, Iowa, raised money to send to volunteers who were cleaning the oil from the skin and feathers of the affected wildlife.

If you were trying to design the most efficient nuclear fission reactor possible, what ratio of U-235 to U-238 would you want? Explain why.

Militarism in Europe in the late 1800s? a. Nations made political and military alliances. b. Strong governments developed. c. Nations made economic alliances. d. Political tension between nations was reduced.

An object is suspended from the ceiling with two wires that make an angle of 40° with the ceiling. The weight of the body is 150 N. What is the tension in each wire? 41.6 newtons 82.3 newtons 150 newtons 117 newtons

What is the value of 9682 when rounded to three significant figures

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?