Venus has no _______________ to absorb the ultraviolet radiation in sunlight
Fill in the blank(s) with correct word
ozone layer
ozone
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The amount of dark matter in the universe is
A) about the same as the amount of visible matter. B) many times more than the amount of visible matter. C) about twice as much as the amount of visible matter. D) many times less than the amount of visible matter. E) entirely unknown at the present time.
A 2 kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s, and they stick together. After the collision, the velocity of the combined bodies is
a. 0 b. 0.8 m/s towards the right c. 0.8 m/s towards the left d. 2.4 m/s towards the right e. 2.4 m/s towards the left
On a winter day the temperature drops from –5°C to –15°C overnight. If a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?
A 2.0-mol ideal gas system is maintained at a constant volume of 4.0 L. If 110 J of heat is added, what is the work done on the system? ?
a. 5.5 J b. 3.7 J c. ?3.7 J d. zero e. 22 J