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A floodlight with a mass of 36 kg is used to illuminate the parking lot in front of a library. The floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole, as shown. A cable that makes an angle of 13? with the beam is attached to the pole to help support the floodlight. Assume the mass of the beam is negligible when compared with the mass of the floodlight.
Find the force FT provided by the cable. The acceleration of gravity is 9.81 m/s2 .
Two narrow slits separated by 0.51 mm are illuminated by monochromatic light of wavelength 670 nm. How many bright fringes can be seen on a screen 1.3 cm wide placed 1.1 m in front of the slits.
A sanding disk with rotational inertia 2.4 10-3 kg•m2 is attached to an electric drill whose motor delivers a torque of 8 N•m about the central axis of the disk. What are the following values about the central axis at the instant the torque has been ..
Assume you wish to send a 200 bytes long message from your equipment to a friend's machine via four intermediate nodes. You are needed to use a header size of 5 bytes per packet.
Two narrow slits 62um apart are illuminated with light of wavelength 480nm . What is an angle of the bright fringe in degrees.
A meterstick is at rest in an inertial frame S2. If S2 moves with a speed of 0.7c with respect to a rest frame S1, find the length of the meterstick as measured in frame S1 according to classical physics. Reply in units of m.
A plate carries a charge of -2.0 microcoulombs while a rod carries a charge of 2.5 microcoulombs. How many electrons should be transferred from the plate to the rod, so that both objects have the equal charge.
The function y(x, t) = (25.0 cm) cos(?x - 20?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant when that point has the displacement y = +22.0 cm?
The squadron commander has the mandate that the database update should be complete in less than one minute. If the topo database is 20 GB, and link is SONET, what is the minimum standard rate necessary.
One mole of an ideal gas is heated so that T = AP2, where A is a constant and P is the pressure. The temperature changes from T0 to 4T0. Find out the work completed by the gas. (Use the following as necessary: T0, P0, and V0.)
A 12-kg box is free from the top of an incline that is 5.00m long and makes an angle of 40 degrees to the horizontal. A 60-N friction force impedes the motion of the box.
What would be the equilibrium temperature when a 256 g block of copper at 314 °C is placed in a 140 g aluminium calorimeter cup containing 827 g of water at 11.5 °C.
How far will it travel before becoming airborne
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