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A loudspeaker of mass 24.0 kilogram is suspended a distance of h = 2.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.50 m.
Obtain what is the tension T in each of the cables? Use 9.80 m/s2 for the magnitude of the acceleration due to gravity.
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
The rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. Find what average current is required to vaporize the water
a string fixed at both ends is 8.40 m long and has a mass of 0.120 kg. it is subjected to a tension of 96.0 n and set
a sled is resting on packed snow. the coefficient of kinetic friction is now only 0.12. if a person weighing 650 N sits on the sled, what force is needed to pull the sled across the snow
A nearsighted student with a far point of 6.30 m wears contacts that allow him to see distant objects clearly. determine image distance for the tree
Over a certain region of space, the electric potential is V = 4.2x-3.6x^2y+1.5yz^2. On scratch paper, What is the magnitude of the field at the point P
A series RLC circuit consists of a 90Ohm resistor, a 0.20H inductor, and a 105mF capacitor. It is attached to a 120V/60Hz Power line. compute the average power loss
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net, With what minimum average speed must he move
A solid steel ball and a tennis ball the same size are dropped at the same time. Find which ball has the greater force acting on it
an airplane with a speed of 82.7 ms is climbing upward at an angle of 31.8 deg with respect to the horizontal. when the
Calculate the Q-value, recoil energy of the daughter nucleus and the kinetic energy of the alpha particle in the following alpha decays
A diffraction grating has 1900 rulings/cm. On a screen 1.00 m from the grating, it is found that for a particular order m, the maxima corresponding to two closely spaced wavelengths of sodium (589.0 nm and 589.6 nm) are separated by 1.68 mm. Deter..
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