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Determine how much force is needed to keep a 62 kilogram crate moving across a floor at constant speed if the coefficient of friction between the floor and the crate is .18?
A penny is dropped from rest from the top of the Willis Tower in Chicago. Find the speed with which the penny strikes the ground
a force of magnitude 7.50 N pushes three boxes with masses m1 = 1.30 kg, m2 = 2.80 kg, and m3 = 5.30 kg. Find the magnitude of the contact force between boxes 1 and 2
A weather vane initially at rest has a moment of inertia of 0.110 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
Blood can carry excess energy from the interior to the surface of the body, where the energy is dispersed in a number of ways. determine the temperature of the blood
In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. How fast must the rocket travel relative to earth
What tension is necessary to tune string properly
What is the minimum diameter mirror on a telescope that would allow you to see details as small as 4.90 km on the moon some 384000 km away
a projectile is shot from the edge of a cliff 115m above the ground level with a inital speed of 65.0m/s at an angle of 35 degrees
A power cycle operates between a lake's surface water at a temperature of 300l and water at a depth whose temperature is 285 K. at steady state the cycle develops a power output of 10KW, while rejecting energy by heat transfer to the lower tempera..
An 89.6-kg jogger is heading due east at a speed of 2.97 m/s. A63.1-kg jogger is heading 18.2 ° north of east at a speed of2.26 m/s. Find (a) the magnitude and(b) the direction of the sum of the momenta of the two joggers. Describe the direction as a..
A galvanometer has an internal resistance of 100 ? and deflects full-scale at a current of 2.00 mA. how should this resistor be connected to the galvanometer
A nearsighted person cannot see objects clearly beyond 30cm (the far point). what is the power of the lens (in diopters required to correct the patient's vision
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