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Suppose a flat roof has a surface area of 1.38000×102 m2. Presume the air inside the building (and under the roof) is at atmospheric pressure, 1.01325×105 Pa, and that the air racing across the top of the roof is at a pressure of 9.98819×104 Pa.
a) What is the force with which the air inside the house pushes the roof upward? (please calculate this to 5 significant digits)
b) What is the force with which the air outside the house pushes the roof downward? (again, calculate this value to 5 significant digits)
c) The lift force takes into account the sum of these two forces. What is the lift force acting on the roof?
A positive point charge q is fixed in position at the center of a square. A second point charge is fixed to corner B, C, or D. At which corner is the second charge located
If you see the displayed waveform on an oscilloscope screen,given that voltage scale is 50 millivolt/division, and the timescale is 100 milliseconds/div What is the peak-to-peak amplitude for the waveform ?
an automobile whose speed is increasing at a rate of 0.700 m/s^2 travels along a circcular road of radius 20.0m, determine the tangential acceleration component
cientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 5.0kg projectile from rest to a speed of 4.0 x 103 m/s. The net force accelerating the projectile..
you have a string with a mass of 14.1 g. you stretch the string with a force of 8.49 n giving it a length of 1.97 m.
A spherical steel shell with shell thickness 10 mm rolling down the ramp without slipping.assume that the density of aluminum.
it took a force of 250 N to pull a crate weighing 765 N across the floor. the work done was 3500 J. how far was the crate moved
A block oscillating on a spring has period T = 2.0s What is the period if the block's mass is doubled? Explain. What is the period if the value of the spring constant isquadrupled?
Two converging lenses (f1 = 8.50 cm and f2 = 5.90 cm) are separated by 17.4 cm. The lens on the left has the longer focal length. Locate the final image relative to the lens on the right
A 5.000 kg mass starts from rest and slides down on an inclined plane that is 5 degrees above the horizontal. If the body starts from rest and takes 1.25 s to travel a distance along the inclined plane, what is the final velocity of the body
a total of 39 bright and 39 dark newtons rings not counting the dark spot at the center are observed when 570 nm light
A satellite has a geo-synchronos orbit around the earth. How far is it above the earth's surface
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