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Two identical small insulating balls are suspended by separate 0.279 m threads that are attached to a common point on the ceiling. Each ball has a mass of 7.85E-4 kg. Initially the balls are uncharged and hang straight down. They are then given identical positive charges and, as a result, spread apart with an angle of 37.4 ° between the threads. Determine the charge on each ball.
From rest, a 26.7 kg child is sliding down a 5.12 meter long playground slide in a time of 1.98 seconds. Calculate the value of kinetic friction
There is a beam that weighs 1500 kilograms and is twenty meters in length. It has a 15000 kilogram mass on the right side, five meters from the center of gravity. obtain the net tension of each brace that is holding up the beam on both sides.
A particular heat engine has a mechanical power output of 6.00 kW and an efficiency of 28.0%, Find the energy taken in during each cycle
A coil of wire has a resistance of 38.0 ? at 25° C and 43.7 ? at 51° C. What is the temperature coefficient of resistivity
A baseball thrown at a angle of 40.0 degrees above the horizontal at 15.0 m/s from the top of a vertical cliff strikes the ground 42.5 m from the base of the cliff. Ignore air resistance. Find the height of the cliff.
A laser pulse has a duration of 4.00× 10?11 s and a frequency of 6.40× 1014 Hz. How many cycles of wave are in the pulse
Two thin slits are 0.050 mm apart. Monochromatic light of wavelength 634 nm falls on the slits. If there is a screen 6.0 m away, how far apart are adjacent interference fringes
At point A, 4.20m from a small source of sound that is emitting uniformly in all directions, the intensity level is 52.0dB. How far must you go so that the sound level is one-fourth of what it was at A
Sam is a 60 kg diver. At the instant of take-off, his angular momentum about his medial-lateral axis is 20 kg x m^2/s, At take-off what is Sam's angular velocity about the medial-lateral axis
In an open manometer filled with mercury (densty = 13600 kg ? m3 ), the level of mercury column in the air side is 0.09 m higher than that in the gas side
Two stones are thrown simultaneously, one straight upward from the base of a cliff, Find the location (above the base of the cliff) of the point where the stones cross paths
A tow truck pulls a car 5.00 \rm km along a horizontal roadway using a cable having a tension of 850 \rm N. How much work does the cable do on the car if it pulls horizontally
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