Light rays from a distant source __________________, assuming the light does not pass through any cloud-like nebulae

a. are perpendicular b. focus to an image
c. focus to a point d. are parallel


d
RATIONALE: Nothing is mentioned about passing through a lens or bouncing off a mirror.

Physics & Space Science

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An electron is accelerated from rest through a potential difference. After acceleration the electron has a wavelength of 880 nm

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A child on a sled starts from rest at the top of a 15° slope. If the trip to the bottom takes how long is the slope? Assume that frictional forces may be neglected

A) 293 m B) 586 m C) 1130 m D) 147 m

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A sample of has a mass of 50.0 grams. What is number of molecules of carbon dioxide in the 50.0 gram sample? (C = 12.0u, O = 16.0u)

A.
B.
C.
D.
E.

Physics & Space Science

Signs of cratering dominate the surface of Venus

a. True b. False Indicate whether the statement is true or false

Physics & Space Science