A mysterious energy that accelerates the expansion of the universe is

A student takes notes in class. Sound Waves I. Created by a vibration A. Vibration: something that causes air molecules to move back and forth quickly and steadily II. Move through a medium A. Solid B. Liquid C.

The highest frequencies humans can hear is about 20000 Hz. What is the wavelength of sound in air at this frequency? The speed of sound is 340 m/s.

A piece of metal with a mass of 22 g at 92 °c is placed in a calorimeter containing 53.7 g of water at 21 °c. the final temperature of the mixture is 55.3 °c.

How does an increase in temperature generally affect the rate of a reaction?

Why does pressure increase in space?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect