A roller coaster car rapidly picks up speed as it

rolls down a hlope. As it starts down the slope,

its speed is 4 m/s. But 3 seconds later, at the

bottom of the slope, its speed is 22 m/s. What is

the car's acceleration?

What are three factors that move the blood back to the heart

It's very common to have paint thinner in an auto body repair shop. which would be the most effective way of extinguishing a puddle of thinner that catches fire? a. class a extinguisher b. class c extinguisher c. class b extinguisher d. water hose

Electrons are modeled using a "cloud"around the nucleus because they A) can not be precisely located B) travel at the speed of light C) exists in many places at once D) move in an orbit about the nucleus

The higher the elevation the slower weathering occur

Which of the following are considered vectors? Check all that apply. A. Time B. Area C. Displacement D. Velocity

Which mixture can be separated based on differences in particle size of the components

What happens in an open circuit

When analyzing forces, it is allowable to break the motion and forces into horizontal and vertical components.

What is the density of a rock which has a mass of 35 grams and a volume of 7.0 cubic centimeters?

Which statement best describes the relative conductivity of semiconductors? a. They are the most conductive elements. b. They are the least conductive elements. c. They are more conductive than metals but less conductive than nonmetals. d.