A roller coaster car rapidly picks up speed as it rolls down a slope. as it starts down the slope, its speed is 4 m/s. But 3 seconds later, its speed is 22m/s. what is its average acceleration?

A box is pushed 40 m by a mover. the amount of work done was 2,240 J. How much force was exerted on the box

Are there electrical appliances at home that don't use transformers? If yes, state a few examples of them.

Which of the following types of electromagnetic radiation has the shortest wavelength? Gamma rays Microwaves Visible light Radio waves

Divergent boundaries are also called continental drifts continental rifts continental divides continental plates

What happens when the molecules in a steel bar absorb energy, and start moving quickly?

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

The hinge at A and cable BDC support beam ABC. Cable BDC passes over the pulley D that is pinned to the ceiling. (Assume that the + x-axis is to the right and the + y-axis is up along the page.

The "zone of avoidance" a) Accounts for the absence of any planet between the orbits of Mars and Jupiter Prevents collisions between planets in the Solar System.

Electric current is ...