A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency.

A)

0.13s

B)

2s

C)

7.6s

D)

4,275,000 s

Calculate the kinetic energy of 1,400 kg roller coaster car that is moving with a speed of 12 m/s when it reaches the bottom of the hill.

What is the half-life of a radioisotope

What is the width of a slit for which the first minimum is at 45° when the slit is illuminated by a helium-neon laser (λ = 633 nm) ? Hint: The small-angle approximation is not valid at 45°.

Why do the planets orbit the sun

What is an example of an object accelerating

At room temperature what is the strength of the electric field in a 12-gauge copper wire (diameter 2.05 mm that is needed to cause a 2.75 a current to flow?

A conductor has a net charge of + 24 uC. How many electrons are needed to make this conductor neutral

What does Force Means

Yosemite Sam was sailing his ship at a speed of 67 m/s when suddenly a storm accelerated his boat at a rate of 5.4 m/s^2 over a time period of 55s. What was Sam's final velocity? What formula must be used?

When will the earths core overheat and explode from the pressure buildup?