C is the correct answer but the best possible answer is that work is done when a force is imposed on an object and the object moves in the same direction as the force
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Explanation:
2. 

3. Resistors in series only need to be added together so

Answer:1384 Hz
Explanation:
Given
wavelength
=0.25 m
Temperature T
at
velocity of sound is 346 m/s
and we know



f=1384 Hz
Answer:
When two tectonic plates meet, we get a “plate boundary.” There are three major types of plate boundaries, each associated with the formation of a variety of geologic features.
Explanation:
Answer:
When the volume increases or when the temperature decreases
Explanation:
The ideal gas equation states that:

where
p is the gas pressure
V is the volume
n is the number of moles of gas
R is the gas constant
T is the gas temperature
Assuming that we have a fixed amount of gas, so n is constant, we can rewrite the equation as

which means the following:
- Pressure is inversely proportional to the volume: this means that the pressure decreases when the volume increases
- Pressure is directly proportional to the temperature: this means that the pressure decreases when the temperature decreases