2. What characteristics of a planet determine the strength of its gravitational force on other objects?

Moving a magnet inside a coil of wire will induce a voltage in the coil. How is the voltage in the coil increased? A. by moving the coil of wire slowly, and keeping the magnet stationary B. by holding the magnet absolutely still C.

A circular arc has a uniform linear charge density of 4 nC/m. 287 ◦ 2.5 m x y What is the magnitude of the electric field at the center of the circle along which the arc lies? The value of the Coulomb constant is 8.98755 * 109 N · m2 / C 2.

A bicyclist is in a 50-km race. He says he had an average velocity of 35. What is missing in the cyclist's velocity? A. units only B. units and distance C. direction only D. units and direction

Spend time observing or thinking about events that involve matter and energy. Which events can you explain? Which event's can't you explain?

A model rocket weighing 4.9 N launches from a pad. How much work does the little rocket engine do in the first 4 meters

Two electrons are 2.3nm apart. What is the force between two electrons?

3. In a demonstration learning activity, A. the teacher shows children how something works or how to complete an entire activity. B. each child shows and tells about a favorite toy. C.

A 0.12 kg paper airplane flies in a straight line at a speed of 1.3 m/s. How much kinetic energy does the airplane have?

Each atom is composed of electrons and positive material. The mass of the atom is evenly spread throughout the atom. Neutrons are located in the center of the atom. Positive charge occupies a very small volume in the atom.

A hot-air balloon is ascending at the rate of 14 m/s and is 84 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?