Is it possible to remove heat energy from a substance and not change its temperature? Explain, and give an example


Yes. The change in phase from a gas to a liquid, as shown by the condensation of
steam in this experiment.

Physics & Space Science

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If the Moon were covered with water, tidal effects caused by Earth would find the Moon with

A) 1 tidal bulge. B) 2 tidal bulges. C) 3 tidal bulges. D) 4 tidal bulges. E) no tidal bulges.

Physics & Space Science

How do we know that halo stars are older, on average, than disk stars?

A) Halo stars orbit in random directions but disk stars have more ordered orbits. B) There are no blue halo stars. C) There are no red disk stars. D) Theories of galaxy formation tell us that the halo formed earlier than the disk. E) We see evidence for new stars forming in the disk today.

Physics & Space Science

The addition of salt to water affects its

A) crystal composition. B) freezing point. C) viscosity. D) liquidity. E) none of the above

Physics & Space Science

A 6.0-kg object, initially at rest in free space, "explodes" into three segments of equal mass. Two of these segments are observed to be moving with equal speeds of 20 m/s with an angle of 60° between their directions of motion. How much kinetic energy is released in this explosion?

a. 2.4 kJ b. 2.9 kJ c. 2.0 kJ d. 3.4 kJ e. 1.2 kJ

Physics & Space Science