In a vacuum, two particles have charges of q1 and q2, where q1 = + 4.2C. They are separated by a distance of 0.31 m, and particle 1 experiences an attractive force of 4.5 N. What is the value of q2, with its sign?

Velocity is the change in? over the change in time

A fax machine uses 0.106 A of current in its normal mode of operation, but only 0.040 A in standby mode. The machine uses a potential difference of 120 V.

In which of the following would you expect the best transmission of sound? A. A glass of very hot liquid? B. An object in a solid state C. Cold gas

Which type of bond shows two or more atoms sharing electrons? A. iconic B. covalent. C. Equal

The acceleration due to gravity on Mars is twice that on the Moon. If you hit a baseball on the Moon with the same effort (and therefore same speed and angle) as on Mars, how far yet wered rked out ofwould the ball would travel on the Moon compared

Describe the rise and fall of a basketball using the concepts of kinetic energy and potential energy

Another word for character in sports is "sportsmanship." - True False

Assume an 8-kg bowling ball moving at 2m/s bounces off a spring at the same speed that it had before bouncing. What is the momentum of the recoil?

A physics book slides off a horizontal tabletop with a speed of 3.90 m/s. It strikes the floor in 0.350 s. Ignore air resistance. Find the height of the tabletop above the floor.

A guitar string 66 cm long vibrates with a standing wave that has two antinodes. 1. Which harmonic is this 2. what is the wavelength