Which of the options is the best definition of a vector?

A. a specific type of imaginary number

B. a quantity with both magnitude and direction

C. a magnitude described as a number

D. the magnitude of a value

Reactions, such as a fire burning, give off energy in the form of heat. They're called

What is the correct formula for work?

Two sound waves of nearly equal frequencies are played simultaneously. what is the name of the acoustic phenomenon you hear if you listen to these two waves?

Which elements does not exist as a diatomic molecule?

The sweeping second hand on your wall clock is 24cm long. a) What is the rotational speed of the second hand? b) Find the translational speed of the tip of the second hand. c) Find the rotational acceleration of the second hand.

When air pressure is lower what happens to a balloon filled with air

Determine the power input for a motor necessary to lift 300 lb at a constant rate of 7 ft/s. the efficiency of the motor is ϵ = 0.65.

The thermal contact resistance at the interface of two 1-cm thick copper plates is measured to be 0.000056 m2K/W.

A provides resistance in an electric circuit. a. wire b. light bulb c. switch. d. battry

Why is it good for scientist to be skeptical