A projectile is fired straight up at a speed of 10 m/s. How long does it take to reach the top of its motion? The acceleration due to gravity is 9.8 m/s^2. Answer in units of s.

Which of the following quantities are unknown? initial separation of the particles final separation of the particles initial speed of the proton initial speed of the alpha particle final speed of the proton final speed of the alpha particle mass of

Suppose that instead of being inclined to Earth's orbit around the Sun, the Moon's orbit was in the same plane as Earth's orbit around the Sun. (Click "Show Moon with flat orbit" to see this situation.

Which best describes two counteracting forces on an object? Using a dolly to push a box to another location two children pulling apart a wishbone a group of dogs pulling a dogsled across ice two people pushing a broken-down car up the road

Which word means "to get away from something"? a become b dream c escape d practice

A wavelength is the distance between two A. amplitudes. B. frequencies. C. crests. D. hertzes.

Wood is an example of a fossil fuel. User: The type of energy stored by fossil fuels such as coal is a. kinetic energy. b. mechanical energy. c. chemical potential energy. d. electromagnetic energy. User: An example of a fossil fuel is a. wood. b.

What type of changes does erosion cause? A physical B chemical C electrical D magnetic

Which of the following will exert a force on a magnet? another magnet a nearby piece of glass a nearby piece of plastic a nearby electric current

The rate at which light energy is radiated from a source is measured in which of the following units? A. Lumen B. Candela C. Lux D. Angstrom

Which type of energy makes up most of the internal energy of a solid substance? A. Kinetic energy from translation B. Kinetic energy from rotation C. Kinetic energy from vibration D. Potential energy from intermolecular forces