Vibrations cause sounds yet if you move your hand back and forth through the air, you don't hear a sound. Why?

Which two body systems, when working together, give your body shape and allows you to move around, like the boy seen here? A) muscular and skeletal B) digestive and skeletal C) skeletal and circulatory D) cardiovascular and skeletal

Define turbulent flow

In which of the following materials is the velocity of light greatest? A. Air B. Water C. Fused quartz D. Crown glass

A student is pushing a cart of groceries with a mass of 40 kg. The acceleration is 2.5 m/s2. What is the force the student is exerting?

When you whisper you produce a 10-dB sound.

The periodic law states that elements that have similar properties appear ... a. to the left of each other b. to the right of each other c. at every 10th element d. at regular intervals

An expert archer tried to shoot an arrow into a target lying at the bottom of a shallow pool. Even though the water did not change the direction of the arrow, the archer missed the mark by several inches.

Which of the following best describes a mechanical wave? A. A periodic disturbance of a medium. B. A movement of matter. c. A transfer of energy. D. When energy is converted from one form to another.

What is a 2d game. Give a refrence.

Two exactly similar wire of steel and copper are stretched by equal force. if the total elongation is 10cm. find how much each wire is elongated given young's modules for steel = 2*10^10 N/M^2 and Young's modules for copper 2*10^10N/M^2.