The power of a machine measures

A. its rate of doing work.

B. its strength.

C. the force it produces.

D. the work it does.

Wooden crossings that provide protection from the weather is called

What is the effective resistance of a car's starter motor when 150 A flows through it as the car battery applies 12.0 V to the motor?

The law of inertia applies to a. objects at rest. b. moving objects. c. both moving and nonmoving objects

Which of the following is true regarding the Earth's mantle? A It is made mostly of liquid metal that allows it to flow. B Its material moves due to convection currents. C It is the densest of all of Earth's layers.

Categorize the Pluto as either a Jovian planet, terrestrial planet, or other celestial object based upon its characteristics.

A glass window is a clear object that light passes through as it travels in a straight line. This is a good example of A. refraction of light. B. transmission of light. C. absorption of light. D. reflection of light.

Why is net force a vector sum A. All forces have direction and magnitude B. Forces can only be attractive C. All forces are contact forces D. There are four fundamental forces

Does the elf owl's small size allow it to live in cacti

If grapefruit juice has a ph of 3.0 and egg white have a ph of 8.0, which contains more h + ions? how many more?

Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e. What is the wavelength,? Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e.