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A 4.29-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.446. Determine the kinetic frictional force that acts on the box when the elevator is
(a) stationary,
(b) accelerating upward with an acceleration whose magnitude is 1.21 m/s2, and
(c)accelerating downward with an acceleration whose magnitude is 1.21 m/s2.
A student in an undergraduate physics lab is studying Archimede's principle of bouyancy. The student is given a brass cylinder and using a triple beam balance finds the mass to be 1.25 kg
A 0.145-kg baseball pitched horizontally at 27 m/s strikes a bat and is popped straight up to a height of 25 m. calculate the average force [exerted by the bat on the ball] during contact
A Carnot engine operates between 27C and 927C and preforms 4800 J of work. Calculate the net entropy change during one cycle
While sitting in your car by the side of a country road, you see your friend, who happens to have an identical car with an identical horn, approaching you. How fast is your friend approaching you
presume you had job offers from two companies that differed only in how often they produced CEOs. Would these differences affect your decision.
If a helium nucleus with a mass of 6.68 10-27 kg, a charge of +2e, how close will the helium atom come to the gold nucleus before it stops and turns around
A 3500 resistor and a 1.7 µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms)
What is the speed of the helium atoms in the tank.
avocados and peaches are equally priced in SA. If consumers in both states maximize utility (and have identical preferences),
A ten pound car wheel has a moment of inertia of 0.52 kg m2. How much torque is required to stop the wheel in 43.21 s?
A photon of wavelength 0.1800 nm strikes a free electron that is initially at rest, What is the energy of the photon (in eV) after it has scattered from the electron
A circular loop of wire 66 mm in radius carries a current of 102 A. find the energy density at the center of the loop
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