If you exert a force of 400 N to move a brick 2 m over 4 s, how much power do you use?

Which force is responsible for producing a stable nucleus by opposing the electrostatic force of repulsion between protons? (1) strong (3) frictional (2) weak (4) gravitational

A runner completes a 10 km run in about 45 minutes. What was the runner's speed in km/h?

Which statement describes the magnetic effect of a bar magnet?

The persistence of vision for normal eye is

Where is nitrogen found?

How much force is needed to accelerate an object of mass 90 kg at a rate of 1.2 m/s2? 0.013 N 75 N 108 N 1080 N

No work is done on an object when a force acting on the object does not move it. True False

wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes through a diffraction grating that has 250.0 lines per mm

If a fully loaded shopping cart has a head-on collision with an empty cart both moving at the same speed toward each other, which cart experiences the greater force? The greater impulse? The greater change in momentum? The greater acceleration?

Why didn't early Portuguese and Dutch explorers decide to create settlements in Australia