Two plane mirrors are inclined at an angle of 70. For a ray of light, incident on mirror 1, its angle of reflection from mirror 2 is

To practice Problem-Solving Strategy 16.1 Standing waves. An air-filled pipe is found to have successive harmonics at 800 HzHz, 1120 HzHz, and 1440 HzHz. It is unknown whether harmonics below 800 HzHz and above 1440 HzHz exist in the pipe.

Which best describes the body in terms of simple machines?

Why do opposite charges attract and like charges repel?

Two physical pendulums (not simple pendulums) are made from meter sticks that are suspended from the ceiling at one end. The sticks are uniform and are identical in all respects, except that one is made of wood (mass = 0.

1) Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away by a space ship at 90% of the speed of light. After 65 years they are reunited.

During a free fall Swati was accelerating at - 9.8m/s2. After 120 seconds how far did she travel? Use the formula = 1/2 * t2 to solve your answer. (Do not forget to keep units in your answer.)

How do sinkholes form?

What is the result of wave motion on water particles? A.) Water particles are pushed forward as they move up and down. B.) Water particles barely move forward as they move up and down. C.) Water particles are pushed down as they move side to side. D.

Nitric acid (HNO3) and potassium hydroxide (KOH) combine in a neutralization reaction to form water and a salt. Which of the following correctly identifies the salt that is produced? OHK NOK2 KNO3 HOH

When the speed of something is the same what is that called