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
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Which of the following offers evidence to support the hypothesis that life arises relatively easily under the conditions that existed on the early Earth?
A) Small animals like Tardigrades can survive exposure to the near-vacuum of space. B) Life is currently present in extreme environments like deep ocean volcanic vents. C) Life was present on Earth by about the time that the heavy bombardment ended. D) All organisms on Earth use DNA as their genetic material.
Which of the following energy forms is stored in any compressed or stretched object?
a. nonmechanical energy b. elastic potential energy c. gravitational potential energy d. kinetic energy
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.
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