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Block C starts from rest and moves downward with a constant acceleration. Knowing that after 12 s the velocity of block A is 456 mm/s, determine
(a) The accelerations of A, B, and C,
(b) The velocity and the change in position of block B after 8s.
The tires on a new compact car have a diameter of 2.0 feet and are warranted for 56,000 miles. Find the angle (in radians) through which one of these tires will rotate during the warranty period
A 72 kg man in a 5.0 kg chair tilts back so that all the weight isbalanced on two legs of the chair. find the pressure exertedby each leg on the floor
In an interstellar gas cloud at 50 K, the pressure is 1.00 x 10-8 Pa. Assuming that the molecular diameters of the gases in the cloud are all 20 nm. Find what is their mean free path
The exterior walls of a house have a total area of 204 m2 and are at 11.4°C and the surrounding air is at 7.4° C. Find the rate of convective cooling of the walls
a solenoid with n1800 turnsm and a current i1 3a is filled with a paragmagnetic material at t1 250 k. a second
A 56.1 kg child is standing on the outer edge of a merry-go-round which has moment of inertia 864 kg.m^2 and radius 2.40 m. Find the angular velocity if the child moves to a final position
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
Two parallel slits are illumining by light composed of two wavelengths, one of which is 654 nm. On a viewing screen, the light whose wavelength is known produces its third dark fringe at the similar place where the light whose wavelength is unknown p..
Would a plucked guitar sting vibrate for a longer time or a shorter time if the instrument had no sounding board? explain.
Coil 1 has L1 = 47 mH and N1 = 104 turns. Coil 2 has L2 = 68 mH and N2 = 215 turns. The coils are fixed in place; what self-induced emf appears in that coil
When an object such as a plastic comb is charged by rubbing it with a cloth, If that charge is 3.4 µC, by what percentage does the mass of a 35g comb change during charging
Consider two long, straight parallel wires each carrying a current I = 4.0 A, Find the magnetic field at one wire produced by the other wire if the wires are separated by a distance r = 2.50 mm
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