A rock is dropped from the top of a 500m cliff. How long does it take the rock to reach the bottom

The force exerted on an object by gravity is called

The average Intensity of the electromagnetic field due to sunlight at the surface of the earth is 1400 W/m^2. Calculate the maximum values of the electric field and magnetic field.

An object has a mass of 120 kg on the moon. What is the force of gravity acting on the object on the moon?

How much heat is absorbed by a 43g iron skillet when its temperature rises from 8oC to 28oC?

The scale in April's bathroom reads her mass as being 45 kg. However, the label on the side of the box the scale came in says (in fine print) that it has a 3.0% uncertainty. What is the uncertainty in the scale, in kg?

A symmetric projectile spends a total of 6 seconds in the air. How long does it take to reach its peak height? The projectile has a starting velocity of 8m/s.

A shipn sends out ultrasound that returns from the seabed and is detected after 5 seconds. if the speed of ultrasound through seawater is 1600 m/s what is the distance of the seabed from the ship?

What planet has the longest period of revolution?

How does the potential energy of an object change when its height is tripled

In a plate glass factory, sheets of glass move along a conveyor belt at a speed of 15.0 cm/s. An automatic cutting tool descends at preset intervals to cut the glass to size.