If the temperature of a sample of water at 4°C is slightly lowered, its volume

A) Remains the same
B) Decreases
C) Increases


Answer: C) Increases

Physics & Space Science

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How do we know that pulsars are neutron stars?

A) We have observed massive-star supernovae produce pulsars. B) Pulsars and neutron stars look exactly the same. C) No massive object, other than a neutron star, could spin as fast as we observe pulsars spin. D) Pulsars have the same upper mass limit as neutron stars do. E) none of the above

Physics & Space Science

A projectile is launched from ground level at an angle of 50.0° above horizontal with a speed of 30.0 m/s. If the projectile is moving over level ground, how long is it in the air before it again contacts the ground?

A) 8.12 s B) 2.35 s C) 4.69 s D) 6.44 s E) 11.3 s

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If you move a clock from Earth to the Moon, the clock runs

A) slower. B) no differently. C) faster.

Physics & Space Science

An object is placed to the left of a converging lens. Determine if the following statement is true or false. The image is always smaller or the same size as the object

1.True 2.False

Physics & Space Science