How are base units and derived units related?

Why is it important that radioisotopes used in diagnostic tests have short half-lives? 20 A) These radioisotopes have a greater activity so they B) This minimizes the harmful side effects of the radiation.

Which of the following is an example of a wedge? a. a mop b. an axe c. a wheel d. a door knob

Imagine an elevator crowded with too many passengers for such a small space. This situation would be a good analogy for a substance with what property

Which planet is outside of the solar system? A. Earth B. Asteroid belt C. Sun D. Nebula

Does mass affect the final velocity of an object if the object begins with a high initial velocity?

Salt water has greater density than fresh water. A boat floats in both fresh water and in salt 12) water. Where is the buoyant force greater on the boat?

A 1000-kg space probe is motionless in space. to start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s. at the end of this process it is moving at 20 m/s. the approximate mass of the ejected gas is:

In the fishbowl, the glass, water, rocks, and plastic plants are in thermal equilibrium. This situation means the temperature of the rocks is? F. If the water is 75 degrees

An archer shoots an arrow at a 75.0 m distant target; the bullâs-eye of the target is at same height as the release height of the arrow. (a) at what angle must the arrow be released to hit the bullâs-eye if its initial speed is 35.

Which of the following is considered a contact forces?1) the force between two magnets. 2) the gravitational pull of a planet. 3) friction between an object and air. 4) the force between two charged particles.