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A long, uniform rope with a mass of 0.120 kg per meter lies on the ground. You grab one end of the rope and lift it at the constant rate of 1.40 m/s. Compute the upward force you should exert at the moment when the top end of the rope is 0.580 m above the ground.
Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 16.0 kg and the larger bottom crate has a mass of m2 = 90.0 kg. what is the acceleration of the lower crate
You look through a Polaroid sheet at a 60 W light bulb 3.00 m away. Find the intensity of the light you see
You measure an angle of 21.3 when the light passes through a grating with 640 lines per mm. What is the wavelength of the light
A conductor with cross-sectional area 6 cm^2 carries a current of 15 A. what is the drift velocity of the electrons
Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m. . (b) Find the satellite's orbital period.
A current of 1.5 A is flowing through a resistance of 18Ω. What is the voltage difference across their resistance
You are looking down at the earth from inside a jetliner flying at an altitude of 9440 m. The pupil of your eye has a diameter of 1.96 mm. Decide how far apart two cars must be on the ground if you are to have any hope of distinguishing among them in..
A glass is half-full of water, with a layer of vegetable oil (n = 1.47) floating on top. Determine the critical angle for the oil-water interface
A 56-? loudspeaker, a 8.9-? loudspeaker, and a 2.3-? loudspeaker are connected in parallel across the terminals of an amplifier. Determine the equivalent resistance of the three speakers
Suppose the rotational kinetic energy of a solid disc is 1000 J when the disk has an angular velocity of 3 rad/s. What is the disk's moment of inertia
lasik eye surgery uses pulses of laser light to shave off tissue from the cornea reshaping it. a typical lasik laser
The Ed-Scale defines the perfect temperature of a martini to be 14 degrees E and the boiling point of antifreeze to be 100 degrees E. Use this equation to find the freezing point of water in Eds
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