A 50n box is lifted 2 meters in 3 seconds.

a. how much work is done for the box?

b. is the work or positive?

c. how much power is needed to lift the box?

Which scientist discovered the two radioactive elements radium and polonium?

What is transferred by a force moving an object through a distance? A. force B. mass C. motion D. energy

A 24.0-V battery is connected in series with a resistor and an inductor, with R = 9.40 Ω and L = 6.40 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value.

Which of these best explains why Earth's tectonic plates move? Convection currents in the asthenosphere make fluid particles move. Cooling causes contraction and shifting of the fluid particles in the lithosphere.

Can a lunar eclipse happen during any phase of the Moon?

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