An electromagnetic wave of frequency 10^21 Hz is best classified as _.

A. a gamma ray

B. a radio wave

C. Visible light

D. a microwave

Can an object have an instantaneous velocity if it has zero acceleration?

Mohs scale is used in describing which characteristic?

Since our number system is on a base-10 notation, we do not need to learn scientific notation.

What best compares radiation and conduction

A zero-order reaction has a constant rate of 2.30*10-4 M/s. If after 80.0 seconds the concentration has dropped to 1.50*10-2 M, what was the initial concentration?

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why:

A light ray is incident on a reflecting surface. If the light ray makes a "35°" angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal?

Reimbursement means that a client is A. able to apply for healthcare insurance and refunded for a partial sum of the payment plan by the state. B.

Meg runs a 10km race in 45 minutes (0.75 hours). What was her speed in kilometers per hour? a. 22 km/hr b. 7.5 km/hr c. 4.5 km/hr d. 13 km/hr