During a phase change, energy is absorbed. what type of reaction is this?

A. Exothermic

B. Endothermic

C. Sublimation

D. Fusion

Must two quantities have the same dimensions if you are subtracting them?

What is the purpose of the scientific method

Two classes of students line up for a tug of war. If both classes have the same number of students on a team, what other factor is very important so one team can win?

You suspect that a power supply is faulty, but you use a power supply tester to measure its voltage output and find it to be acceptable. Why is it still possible that the power supply may be faulty?

Dinosaur fossils are too old to be reliably dated using carbon-14, which has a half-life of about 5730 years. Suppose we had a 68 million year old dinosaur fossil.

If you want your investment or savings account to be easily turned into cash without losing its value, you should consider the?

What is the definition of "gravitational potential energy"?

A number of food chains linked together

Inside a stereo speaker, you will find two permanent magnets: one on the cone and one near the cone. True of false?

When a hurricane nears land what causes the most damage