A controlled experiment has all variables held constant

a. true
b. false

Ans: b. false

Physics & Space Science

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A 100 kg crate is attached to a rope wrapped around the inner disk as shown. A person pulls on another rope wrapped around the outer disk with force F to lift the crate

How much work is done by the person to lift the crate 2 m?

1.about 400 J 2.slightly less than 2,000 J 3.exactly 2,000 J 4.slightly more than 2,000 J 5.much more than 2,000 J 6.Impossible to determine without knowing F 7.Impossible to determine without knowing the radii 8.Impossible to determine without knowing the mass of the pulley 9.Impossible to determine for two or more of the reasons given in 6, 7, and 8 above 10.Impossible to determine for some other reason(s)

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Physics & Space Science

A wave is described by the function y(x,t) = (3.00 cm)cos[( 3.00 m-1)x + ( 4.00 s-1)t]. What is the wavelength of this wave?

A) 2.09 m B) 3.00 m C) 0.333 m D) 0.250 m E) 1.57 m

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Physics & Space Science

What is the origin of Io's volcanism?

What will be an ideal response?

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Physics & Space Science

All of the following statements are true. Which one explains the reason why there is not a solar eclipse at every new Moon?

A) The nodes of the Moon's orbit precess with an 18-year period. B) The orbital plane of the Moon is tilted by about 5° to the ecliptic plane. C) The Moon rotates synchronously with its revolution about Earth. D) The sidereal month is shorter than the lunar month. E) The Moon is the primary cause of tides on Earth.

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Physics & Space Science