The radius of earth is 6370km and of mars is 3400km. if an object weighs 200N or earth, what will be it's weight on mars. the mass of mars is 0.11 that of earth.

When two notes are played simultaneously creating a discordant sound it is called

A 50.6 g ball of copper has a net charge of 1.6 µc. what fraction of the copper's electrons have been removed? (each copper atom has 29 protons, and copper has an atomic mass of 63.5.

What is the unit of measurement for power? A. m/s2 B. watts C. joules D. newtons

When generators use mechanical energy, what type of energy is produced? kinetic energy electrical energy potential energy magnetic energy

Speed is a vector quantity

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?