a hammer falls off a roof and strikes the ground with a certain kinetic energy. If it fell from a roof twice as tall, how ouwld its kinetic energy compare? Explain.

An astronaut weighs 8.00x10^2 newtons on the surface of Earth. What is the weight of the astronaut 6.37x10^6 meters above the surface of Earth?

A bag of apples has a weight of 22 newtons. What is the approximate mass in kilograms

A 6.5-l sample of nitrogen at 25°c and 1.5 atm is allowed to expand to 13.0 l. the temperature remains constant. what is the final pressure?

Which of the following laws best define this statement? The total amount of energy in a closed system stays the same OA) Kepler's law OB) Avogadro's law OC) The law of negative energy D) The law of conservation of energy

Jose is loading his luggage into his car so that he can go to visit his grandmother. He lifts his suitcase up a 10 m staircase in his basement to the entrance of his garage with an average force of 60 N.

Do you think an observer on another planet in the solar system might see eclipses

A. A vector is any element of a vector space. Is this statement true or false? A. True by the definition of a vector space B. False; not all vectors are elements of a vector space. C. False; a vector space is any element of a vector.

19 Which gas is the most abundant greenhouse gas? A. ozone B. chlorofluorocarbon C. carbon dioxide OD. methane E. water vapor Reset Next

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pushed together, without touching. How is the amount of charge on the plates affected during this process? a.

Which of the following creates a longitudinal wave? A. striking a gong B. turning on a flashlight C. shaking a rope up and down D. dropping a stone into a pond