A ball is thrown horizontally from a cliff and hits the ground 4 seconds later 40

meters from the base of the cliff. How fast was the ball thrown?

When is chemical energy transformed to potential energy

If there are 3 apples and you take away two, how many do you have?

A 30 kg dog runs at a speed of 15 m/s. What is the dog's kinetic energy (in jewels) ? Round the answer to two significant digits.

Which statement is true? Hydroelectric power is generated from moving water. Oil, a renewable resource, is processed to make jet fuel. Propane, a renewable resource, is used in some heating systems.

For which of the following situations is the conservation of mechanical energy most likely to be a valid assumption? a. a skateboard rolls across a sewer grate b. a parachutist falls from a plane c. you rub your hands together to keep warm d.

A car travels 20 km west, then 20 km south. what is the magnitude of its displacement? A) 0 km B) 20 km C) 28 km D) 40 km

A sport car accelerates from rest to 29 m/s in 4.4 sec. what's its acceleration?

How do you unscramble the science topic atsetlectoicnp

What holds metal ions together?

Describe a situation when you might travel at a high velocity but with lo acceleration