Magnification is greater with a lens having a

A) high index of refraction.
B) low index of refraction.
C) same in each

Answer: A

Physics & Space Science

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In the color wheel shown below, which colors are the primary colors?

A. red, yellow, blue B. orange, green, purple C. green, blue, purple D. yellow, orange, red

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Hawking radiation

a. explains how stars gravitationally collapse to form black holes. b. causes the short lives of black holes. c. is due to one particle from particle-antiparticle pairs. d. explains the accretion disks around black holes. e. provides for an event horizon.

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Motion in a circle at constant speed is motion with constant acceleration

Indicate whether the statement is true or false

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By how many newtons does the weight of a 100-kg person change when he goes from sea level to an altitude of 5.0 km if we neglect the earth's rotational effects? (The mean radius of the Earth is 6.38 × 106 m, G = 6.67 × 10-11 N ? m2/kg2.)

A) -0.60 N B) -1.5 N C) -2.6 N D) -3.6 N E) -5.2 N

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