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A trap door, of length and width 1.65 m, is held open at an angleof 65.0 degree with respect to the floor. A rope is attachedto the raised edge of the door and fastened to the wall behind thedoor in such a position that the rope pulls perpendicularly to thetrap door. If the mass of the trap door is 16.8 kg, what is the torque exerted on the trap door by the rope?
A pendulum of length 9.00 m is held out to point A. At the vertical position, an overhang effectively cuts the length of the pendulum by an amount equal to 3m. (That is, 3.0 m is no longer free to swing.) How long does this pendulum take for one o..
The Cosmoclock 21 Ferris wheel in Yokohama City, Japan, has a diameter of 100 m, Find the speed of the passengers when the Ferris wheel is rotating at this rate
A beam of vertically polarized light encounters two polarizing filters, as shown in the figure(Figure 1) . Calculate the transmitted intensity for each of the cases in the figure, assuming that the incident intensity is 26.5 W/m^2
A block of wood, with density 780 kg/m3 has a cubic shape with wides 0.330 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. What is the mass of the lead
A 3.1-cm-tall object is 47 cm in front of a converging lens that has a 11.8 cm focal length. Calculate the image position and height. position cm height cm.
A person walks into a room that has two flat mirrors on opposite walls. The mirrors produce multiple images of the person. Consider only the images formed in the mirror on the left.
The distance from the center of a circular diffraction pattern to the first dark ring is 15,000 wavelengths on a screen that is 0.85 m away
A car starts from rest and travels for 7.0 seconds with auniform acceleration of +2.5 m/s^2. how far has it gone
During an earthquake, a house plant of mass 10.0 in a tall building oscillates with a horizontal amplitude of 12.0 at 0.30. What is the magnitude of the maximum velocity of the plant
Consider a heat engine that operates between thermal reservoirs at 510 K and 242 K. Suppose the engine does 4900 J of work while it expels 103 J of energy to the cold reservoir. Is this engine possible in the real world? Hint: Violations of the secon..
jamie is playing tennis. a 0.057kg ball is coming towards her at a velocity of -14 ms. after she hits it in the exact
A package in an airplane moving horizontally at 275 m/s is dropped while the altitude is 766 meters. How far forward from the spot over which it was dropped does the package land.
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