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Once upon a time, a stunt man named Evil Knievel boasted that he would jump across the Grand Canyon on a motorcycle. (This stunt was never attempted.) The width of the Grand Canyon varies from place to place, but suppose that Mr. Knievel attempts to jump across at a point where the width is about 4.18 miles, and the two rims are at the same altitude. What minimum initial speed would be required to make it safely across the canyon? Express your answer in m/s and mph. Ignore air drag.
Consider a solid metal conductor in static equilbrium. What is the electric field inside the conductor
On a very muddy football field, a 120 kg linebacker tackles an 80 kg halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.8 m/s north, What is the direction of this velocity
A student throws a baseball at a large gong 76 m away and hears the sound of the gong 1.95758 s later. What was the average speed of the base- ball on its way to the gong
a metal block of mass 1.230 kg is hanging from a string. the tension in the string is 7.184 n. the block is submerged
Suppose that the central diffraction envelope of a double-slitdiffraction pattern contains 3 brightfringes and the first diffraction minima eliminate (are coincidentwith) bright fringes. How many bright fringes lie between the first and second minima..
A block with mass m1 = 9.4 kg is on an incline with an angle ? = 24.0° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: ?k = 0.23 and ?s = 0.253. * When th..
David is driving a steady 21 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.20 m/s^2 at the instant as David passes.
Two protons, each having a speed of 0.970c in the laboratory, are moving toward each other. Determine the momentum of each proton in the laboratory
Two particles are fixed to an x axis: particle 1 of charge -4.00 10-7 C at x = 6.00 cm, and particle 2 of charge +4.00 10-7 C at x = 42.0 cm
Starting from rest, a 12-cm-diameter compact disk takes 2.5s to reach its operating angular velocity of 1500rpm. How much torque is applied to the disk
question1a man of mass 700kg stands in a lift on a set of weighing scales. the scale is calibrated in newtons. assume a
A hot air balloon is descending vertically with a speed of 4.0 m/s when a passenger drops a 0.5 Kg camera. If the camera is 45 m above the ground when it is dropped:
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