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Suppose a flat roof has a surface area of 1.31000×102 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 1.00359×105 Pa. What is the force with which the air inside the house pushes the roof upward? (please calculate this to 5 significant digits) What is the force with which the air outside the house pushes the roof downward? (again, calculate this value to 5 significant digits) The lift force takes into account the combination of these two forces. What is the lift force acting on the roof?
Two parallel plates have equal and opposite charges. When the space between the plates is evacuated, the electric field is E= 3.20×105V/m. find the charge density on each surface of the dielectric
A microscope has a 12.0 x eyepiece and a 59.0 objective lens 20.0 cm apart. Calculate (a) the total magnification, (b) the focal length of each lens, and (c) where the object must be for a normal relaxed eye to see it in focus?
a particle of charge q is fixed at the origin of an xy coordinate system. at t 0 a particle m 0.934 g q 3.72 microc
Let the mass of the star be 1.98e30 kilogram and the power be 8.52e27 Watt. The universal gravitational constant is 6.6726e-11 Nm^2/kg^2 and speed of light is 3e8 m/s. find what is the radius of this particle is micrometer
A parallel-plate capacitor has a capacitance of 19.0 µF. What charge on each plate would produce a voltage of 36.0 V between the plates? What is the voltage between the plates?
What is the total magnitude of the magnetic flux by the coil before it is rotated.
In the Experiment, you calculated the ratios of the measured distances, i.e. the ratios of Effort Distance/Load Distance. How did your calculations compare to your expectations
solve each equation. write the missing quantity the correct unit of measure and the quantity being measured1. x4 kmh
A block of mass 2.50 kg is pushed 2.20 m along a frictionless horizontal table by a constant 20.0 N force directed 25.0° below the horizontal. Determine the work done by the net force on the block
Taking the speed of sound to be a convenient 330 m/s, what is the wavelength of sound with frequency of 440 Hz (which is an A on the piano)
If the range of the projectile is 2.39 m, the time-of-flight is T = 0.919 s, and air resistance is turned off, determine the following. What is the launch angle of the projectile
A colonial gunner sets up his 225-kg cannon at the edge of the flat top of a high tower. It shoots a 4.5-kg cannonball horizontally. The ball hits the ground 215 m from the base of the tower. The cannon also move on frictionless wheels, and falls off..
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