When food is stored in a container (a can or a jar), the food and the container are heated to a very high temperature in order to kill the germs. then the lid is attached. when the food and the container cools, the air pressure under the lid drops below atmospheric pressure, and the lid is pushed down by the weight of the air above it. this is why lids "pop up" when you open a sealed container. suppose that a container of spaghetti sauce has a circular lid with a radius of 7.5 cm and that the air pressure underneath the lid is 42 kpa. how much force (in n) is required to lift the lid at sea level where the earth's atmospheric pressure is 101.325 kpa.
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Physics, 22.06.2019 10:40
Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v
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Physics, 22.06.2019 12:20
The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.
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Physics, 22.06.2019 12:50
The heliocentric and the geocentric models of the solar system included these central principles
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Physics, 22.06.2019 14:40
An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.
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When food is stored in a container (a can or a jar), the food and the container are heated to a very...
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