Early greeks, such as aristotle, thought all the matter was made of which four elements

A new car owner wants to show her friend

determine which of the following must change when pitch gets higher a. amplitude b. frequency c. wavelength d. intensity e. speed of sound waves

1. Go onto the Newsround website or article 2. Search "School girl banned for Muslim dress" Answer this question: Who is Sobia?

While jumping on a trampoline you calculate that at the highest peak of your jump you have 900 joules of gravitational potential energy. What will be your kinetic energy just before landing back on the trampoline?

What happens to the period of revolution for the planets as they move farther away in position from the sun

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planers in orbit around the Sun.

What wave-like property of light causes it to bend when encountering an opening? A. Reflection B. all the above c. Refraction d. none of the above e. diffraction

Which of the following statements describe sliding friction? Select all that apply. 1.) a force that causes an object to increase speed 2.) a force in which one of the objects involved must be a liquid or a gas 3.

What do a broken rode and a volcano eruption have in common

What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?