John took 45 minutes to bicycle to his grandmother's house, a total of 4 kilometers. What was his velocity in km/hr?

Which statement is part of Bohr's atomic model? A. Electrons absorb or emit light when they change energy levels. B. Electrons with the highest energy are found with orbits of the smallest radius. C.

The energy to form plasma comes from which of the following sources? A. The movement of particles B. Attractive forces between particles. C. The shape of the plasma D. Heat or electricity in the atmosphere.

What do two troughs make when they meet

The volume of a gas is directly proportional to its temperature the pressure in the number of particles is constant. this is a statement of which law

The linear impulse delivered by the hit of a boxer in 104 N. s during the 0.431 s of contact. What is the magnitude of the average force exerted on the glove by the other boxer? Answer in units of N

Object A has a length of 3 cm, a width of 10 cm, and a height of 2 cm. Object B is dropped into a graduated cylinder. It displaces 60 mL of water. The volume of object A is:

Is the following sentence true or false? Some information about an object or process may be missing from a model.

If V is a velocity, l a length, and v a fluid property having dimensions of L2T-1, which of the following combinations are qualitatively dimensionless (show work for a through d) : (a) V l v (b) Vl/v (c) V2v (d) V / (l v)

What happens to the total mechnical energy of the apple as it falls from the tree?

Fair Bonus Question: Derive the equation for gravitational potential energy, starting with the definition of work.