A ball is tossed int the air and rises to a height of 12m. How long is the ball in the air?

When hiking or climbing, it is important to be watchful of areas where erosion has occurred, due to an increased risk of rock slides.

In a simple model of the hydrogen atom, the electron moves in a circular orbit, of radius 0.053nm, around a stationary proton. How many revolutions per second does the electron make?

Which statement best describes longitudinal waves? A) Particles of the wave medium move perpendicular to the direction of propagation of the wave. B) Longitudinal waves do not require a material medium for propagation.

Which is NOT a property of gold? Select one: a. rare b. malleable c. tarnishes d. corrosion resistant

What element shares the property of forming ions with a 1 + charge?

How do repeater stations improve the quality of a broadcast?

What is the total number of atoms in the following formula? CaBr2 04

The Amazon River is in Europe. True or False

A microwave oven operating at 120 volts is used to heat a sandwich if the oven draws 12.5 amperes of current for 45 seconds what is the power dissipated by the oven?

Which of the transformers are step-up transformers? Which of the transformers are step-down transformers?