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A brick is initially 10.56 cm high and an aluminum can is initially 10.57 cm high. By how much must their temperatures be raised in order for the brick and the can to have exactly the same height?
A cue ball (mass = 0.145 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick, which applies an impulse of +1.15 N · s to the ball. Find the velocity of the second ball just after it is struck
It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). What is the angular speed of the earth
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
If F(r) is the force on an object as a function of of radius r, show that the "tidal" force on an object of lenght delta r is delta F= (dF/dr)delta r
A 200-m-wide river flows due east at a uniform speed of 4.5m/s. A boat with a speed of 9.0m/s relative to the water leaves the south bank pointed in a direction 28o west of north. How long does it take for the boat to cross the river
What additional experiment can help you decide between these two possibilities.
A thin wire is bent into a semicircle, having a radius of curvature equal to 6.40 cm. What is the potential at the center of curvature?
A proton with kinetic energy of 6.20 × 106 eV is fired perpendicular to the face of a large plate that has a uniform charge density of ? = +2.50 ?C/m2. What is the magnitude of the force on the proton
A 9.0W laser beam shines on an ensemble of 1024 electrons, each in the ground state of a one-dimensional infinite square well 0.82nm wide. How many electrons can be so excited if the beam shines for 5.0ms
A 106 m long train begins uniform acceleration from rest. The front of the train has a speed of 23 m/s when it passes a railway worker who is standing 230 m from where the front of train started. What will be the speed of last car as it passes the..
Certain sharks can detect an electric field as weak as 1.1 mu V/m . To grasp how weak this field is, how far apart would the plates have to be
A stunt man drives a car at a speed of 20 m/s off a 24-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20? How far from the base of the cliff does the car land
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