On a winter day the temperature is 5 degrees Celsius and the humidity is 0.003 kilograms per cubic meter. (a) What is the relative humidity? (b) The air is brought into a building and heated to 20 degrees Celsius without changing the humidity. What is the relative humidity inside the building?
(a) 44.1%, (b) 17.3%
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Compared to the ocean, Earth's atmosphere is different in that
A) its density varies with depth. B) it has a less-distinct surface. C) molecules are more greatly spaced. D) all of the above E) none of the above
An ideal solenoid 20 cm long is wound with 5000 turns of very thin wire. What strength magnetic field is produced at the center of the solenoid when a current of 10 A flows through it? (?0 = 4? × 10-7 T ? m/
A) A) 0.0063 T B) 0.20 T C) 3.2 T D) 4.8 T E) 0.31 T
Why did Hubble conclude the universe must be expanding?
What will be an ideal response?
Leptons can interact by which of the following forces?
A) strong nuclear force, weak nuclear force, electromagnetic force, gravitation B) strong nuclear force, weak nuclear force, electromagnetic force C) weak nuclear force, electromagnetic force, gravitation D) strong nuclear force, weak nuclear force E) strong nuclear force, electromagnetic force, gravitation