A steel sphere sits on top of an aluminum ring. The steel sphere (a = 1.10 × 10^-5/°C) has a diameter of 4.0000 cm at 0°C. The aluminum ring (a = 2.40 × 10^-5/°C) has an inside diameter of 3.9900 cm at 0°C. Closest to which temperature given will the sphere just fall through the ring?

a. 462°C
c. 116°C
b. 193°C
d. 57.7°C


B

Physics & Space Science

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An object that is moving in a linear path with an acceleration in the direction of motion has a(n) ______________ velocity

a. constant b. increasing c. decreasing d. none of these

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a. nonmechanical energy b. elastic potential energy c. gravitational potential energy d. kinetic energy

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What is earthsine (aka Ashen light)?

A. the sunlight that shines on the face of the Moon that we never see. B. the light from the Moon that illuminates Earth's surface at night. C. the light we see at dawn just before the Sun rises. D. sunlight reflected by Earth that illuminates the dark portion of the Moon.

Physics & Space Science