Evaporation is when a gas is converted into a liquid
a. True
b. False
Indicate whether the statement is true or false
False
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Replacing a wire resistor with another of the same material and length but with three times the diameter will have the effect of changing the resistance by what factor?
a. 1/3 b. 1/9 c. 3 d. 9
You are trying to identify a mineral that has been brought to your laboratory.
How are Neptune's rings different from the rings of Uranus?
What will be an ideal response?
An astronaut in a space suit is motionless in outer space. The propulsion unit strapped to her back ejects some gas with a velocity of 50 m/s. The astronaut recoils with a velocity of 1.0 m/s. If the mass of the astronaut and space suit after the gas is ejected is 120 kg, the mass of the gas ejected is
A. 1.0 kg. B. 1.9 kg. C. 2.4 kg. D. 3.00 kg. E. 3.6 kg.