Contact area must be 0.00775 m2, which is the area of a circle with 10 cm in diameter. <span>Are you surprised that such a small cup is, in theory, enough to hold your weight? But it all comes from the equation of pressure: </span> <span>P = F / S </span> <span>P= Pressure, in Pascal, [P] </span> <span>F = Force, in Newton [N] </span> <span>S = Surface, in squared meters [S] </span>
<span>Pressure (atmospheric) is 101325 Pascal, and the required force (as per your question) is 80Kg = 785 N. Solving for S, you get 0.00775 m2. </span>
<span>You should have seen these suction cups used by glass workers, where a couple of cups are enough to lift a big piece of glass. This depends on how good the cups are and how smooth the surface of the ceiling or glass is. The idea is to have no pressure inside the cup. If you have some air inside the cup then atmospheric pressure might not be enough to hold 80Kg, as calculated.</span>
Its saying the difference between the two years of rainfall. Difference meaning subtract the two, 50.38 inches and 55.76 inches. It gives 5.38 inches. If you have answer choices then i would go with that but i tried my best to figure it out.
An even function is symmetrical about the y-axis. The mirror image of the point across the y-axis will also be on the graph. That point is found by changing the sign of the x-coordinate: (-3, -5).
