Approximately how much of Earth's water is freshwater?

1 %

3 %

97 %

50 %

What is the weight, in n, of an object with a mass of 200 kg at a location where g = 9.6 m/s2. round the final answer to the nearest whole number?

As a substance changes phase from solid to liquid to gas, the molecules become closer together.

Which of the following happens when a material undergoes a phase change? a. The temperature changes. b. Heat flows into or out of the material. c. The chemical composition changes. d. The molecules break apart into atoms.

How do I rank glass, oil, and water in terms of their index of refraction?

An old theory about the position of planets and the sun in the galaxy has been replaced by a new theory. Which of these statements is correct about the two theories? The new theory is accepted because its explanations became a law.

A farmer had 15 sheep, and all but 8 died. How many are left?

While playing with her 5 year old cousin, a Physics 135 student pushed him forward on his scooter. She pushes with a force of 50 Newtons for 3.5 seconds. If the boy and the scooter together have a mass of 30 kg, what is their final velocity? a. 2.

3. A 120.0 V generator supplies 3.0 kw of power. How much current ca the generator deliver?

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?