What is the speed of sound in air at 30 degree C?

A car accelerates from rest at 2 m/s^2. what is the velocity at 8 seconds.

What must be the orbital speed of a satellite in a circular orbit 740 km above the surface of the earth?

Of the two primary components of the interstellar medium, dust and gas, the interstellar gas does not obscure background light passing through to any great extent.

Why doesn't water freeze from the bottom up?

Which of the following will cause an increase in gas pressure in a closed container? a. lowering the temperature b. reducing the volume c. adding more gas d. both b and c

What does the ozone layer absorb? a. Microwaves c. UV radiation b. X-rays d. Infra-red radiation

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.

Your friend states in a report that the average time required to circle a 1.0-mi track was 49.325 s. This was measured by timing 10 laps using a stopwatch with a precision of 0.01 s. Do you believe his results are reliable? Explain.

The forklift exerts a 300.0 N force on the box and moves it 15.0 m into the air. How much work does the forklift do? A. 500 J B. 1.50 * 10^3 J C. 4.50 * 10^3 J D. 0.00 J

Why the room gets hot even we open the door of refrigerator?