Which of the following is NOT true about a hypothesis?

A. It is an explanation for an observation

B. It must restate the question

C. It is testable

D. It can be written as an if/then statement

Which of the following correctly describes voltage difference? A. The push that causes charges to move B. Causes charges not to move C. Flows from low areas to high areas D. Flows from high to low areas

Which of the following is an example of a renewable natural resource? a. the knowledge possessed by scientists b. carpenters' labor services c. lumber d. All of the above are correct.

A beam of hydrogen molecules (h2) is directed toward a wall, at an angle of 55 with the normal to the wall. each molecule in the beam has a speed of 1.0 km/s and a mass of 3.3 1024 g. the beam strikes the wall over an area of 2.

Here are the net charges on the spheres at the start of the process, before any of the balls were touched together. Sphere A has a net charge of 5Q; sphere B has a net charge of - 4Q; and sphere X has a net charge of 9Q.

What organ absorbs excess water from undigested food prior to its release from the body as a solid waste

John rides his motorcycle with a constant speed of 40 miles per hour. How far can he travel in 1/2 an hour?

Geoff counts the number of oscillations of a simple pendulum at a location where the acceleration due to gravity is 9.80 m/s2, and finds that it takes 25.0 s for 15 complete cycles. 1) calculate the length of the pendulum.

Which of the folloing statements about ionization energy is true? A elements toward the bottom of a group periodic table generally have higher ionization energies than elements at the top of a group. B.

A tree is blown down by wind

You wish to design a system to communicate privately with EM radiation inside your home. The communications should not be visible, and people outside of the walls of your home should not be able to spy on them.