If a proton and an electron have the same momentum, the longer wavelength belongs to the

A) proton.
B) electron.
C) both the same


Answer: C

Physics & Space Science

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Dana uses a rope to pull a box that weighs 600 N across a level surface with constant velocity. The rope makes an angle of 40° above the horizontal and the tension in the rope is 400 N. What is the coefficient of friction?

a. 0.89 b. 0.88 c. 2.00 d. 1.19 e. 0.84

Physics & Space Science

A blimp is filled with 200 m3 of helium. How much mass can the balloon lift? The density of helium is one-seventh that of air, and the density of air is 1/800 that of water. Consider the mass of the balloon to be negligible

a. 115 kg b. 214 kg c. 315 kg d. 415 kg e. 37 kg

Physics & Space Science

How should for an ideal gas?

A.
B.
C.
D. One cannot tell without careful calculation.

Physics & Space Science

The radiation our eyes are most sensitive to is the color

A) black at 227 nm. B) blue at 4,321 nm. C) violet at 7,000 Angstroms. D) yellow-green at about 550 nm. E) red at 6563 Angstroms.

Physics & Space Science