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Physics

Cassie Bass

A combustion reaction usually gives off heat and light is it true or false

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Physics

Zoey

Which best describes the differences between how Ptolemy and Copernicus described the solar system?

A.

Ptolemy saw the sun at the center of the solar system, while Copernicus saw the earth as the center.

B.

Ptolemy saw the earth at the center of the solar system, while Copernicus saw the moon as the center.

C.

Ptolemy had a heliocentric view of the universe, while Copernicus had a geocentric view of the solar system.

D.

Ptolemy saw the earth at the center of the solar system, while Copernicus saw the sun as the center.

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Physics

Donald Clayton

A man is standing on the shore of a beach, up to his knees in water. Every 5 seconds a wave breaks on him. What is the period of the wave? A. 12 waves per minute B. 5 hertz C. 5 seconds D. 0.2 hertz

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Physics

Mariana Lam

A beam of light with a wavelength 760 nm in air travels in water. The index of refraction of water is 1.33. What is the wavelength in water?

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Physics

Keaton Delgado

45. An object with a mass of 25 kg accelerates east at a rate of 7 m/s? What fiet force is acting on the object?

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Physics

Gabriella

The speedometer in your car reads 55mi/h this represents ___ of the car

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Physics

Opie

What is the speed of a plane that traveled 1500 km in 2.5 hours? How far would that same plane travel in eight hours if it maintained a constant speed?

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Physics

Joselyn Herring

A 75 W lightbulb is being run on a 110 V outlet. Determine the resistance of the lightbulb. Provide a detailed description of the process.

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Physics

Julie Harvey

A circuit contains two 1.5 volt batteries and a bulb with a resistance of 3 ohms. Calculate the current.

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Physics

Sienna Cervantes

What type of friction acts when the books are at rest but a force is exerted?

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Physics

Guest

What is 0.002 represented by

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Physics

Armando Chan

As the amount of charge on two objects increases, the strength of the electrical force between the objects

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Physics

Conrad

Which of the two resistors dissipates the larger amount of power?

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Physics

Casey Waller

Three students derive the following equations in which x refers to distance traveled, v the speed, a the acceleration (m/s^2), and t the time, and the subscript (0) means a quantity at time t=0: a) x=vt^2 + 2at, b) x=v0t+1/2at^2, and c) x=v0t+2at^2. Which of these could possibly be correct according to a dimensional check?

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Physics

Larry Weeks

Which is a use of fiber optics?

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