20. The change in isotopes over time due to the emission of radioactive particles is known as

A. absolute-age dating.

B. radioactive decay.

C. half-life.

D. radiometric dating.

When work is done on an object, where does the energy used to do the work go?

An electron moving in a wire collides again and again with atoms and travels an average distance between collisions that is called the mean free path.

You are swimming with your buddies on a beach in the surf. you leave your cooler and supplies on the beach, and after a half hour you swim back to shore, but your stuff isn't there. you look along the beach and see your cooler 200 m down the beach.

Compare and contrast rutherford's "planetary model" of the atom with our current understanding of an atom's internal structure.

If you could throw an object high enough to reach space how hard would you have to throw it

A question about a moral issue is answered by examining facts rather than opinions. is generally considered a scientific question. cannot be answered with scientific methods. cannot be debated through discussion.

Who is most likely to have a physiological age that is much younger than his or her actual age?

Inflammation happens when the mucous membranes cannot stop a pathogen. True False

If the diameter of the space station is 730 m, how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9.80m/s2?

The act, process or state of the change in place or position oa a body with respect to time and relative to the observer is said to be : - 1. Rest 2. Stationary 3. Motion 4. None of the above