The water is already at its boiling point
, therefore we don't need additional heat to increase its temperature. Instead, we have to give the heat necessary to make it evaporate. The energy needed is equal to
where
m is the mass of the water
Lv is the latent heat of evaporation
The latent heat of evaporation of water is
, and the mass of this sample of water is
, therefore the heat needed to vaporize the water is
Answer:
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Answer:
Answer:
the shoe which having heel of smaller crossection area.
Explanation:
Pressure is defined as the thrust acting per unit area.
Thrust is the force which acts on the surface perpendicularly.
Pressure = force / Area
Its SI unit is Pascal or Newton per square metre.
As both the shoes have same mass, so force is same but the area of crossection is different for both the shoes.
Teh shoe having heel of small crossection area exerts more pressure on another person's feet then the shoe having heel which has more crossection area.
Explanation:
Answer:
The center of mass of the Earth-Moon system is 4.673 kilometers away from center of Earth.
Explanation:
Let suppose that planet and satellite can be treated as particles. The masses of Earth and Moon (, ) are and , respectively. The distance between centers is 384,403 kilometers. The location of the center of mass can be found by using weighted averages:
If and , then:
The center of mass of the Earth-Moon system is 4.673 kilometers away from center of Earth.