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A large electroscope is made with "leaves" that are 78-cm-long wires with tiny 44 g spheres at the ends. When charged, nearly all the charge resides on the spheres.
If the wires each make a 30 angle with the vertical, what total charge Q must have been applied to the electroscope? Ignore the mass of the wires.
a carnot engine whose low-temperature reservoir is at 19.7degc has an efficiency of 26.8. by how much should the
which one of the following statements concerning the momentum of a systemnbspwhen the net force acting on the system is
a hollow conducting spherical shell of radius 1.20 cm carries a charge of -5.20 nc. what is the electric field at a
question a 1.4 kg object at x 2.00m and y 3.10 m moves at 4.52ms at an angle 45 degrees north of east. calculate the
A plane flies at 1.25 times the speed of sound. The sonic boom reaches a man on the ground exactly 1 min after the plane passed directly overhead. What is the altitude of the plane
A muon with rest energy 106 MeV is created at an altitude of 4600 m and travels downward toward Earth's surface. What is the muon's total energy in the Earth observer's frame of reference
q1. a 2.00 kg metal block slides on a rough horizontal surface inside an insulated pipe. after sliding a distance of
You throw a ball vertically upward so that it leaves the ground with velocity 2.49 m/s. (a) What is its velocity when it reaches its maximum altitude. (b) What is its acceleration at this point.
Two charges, -2.2 microCoulombs and -4.8 microcoulombs, are located at (-0.65m, 0) and (0.65,0), respectively. compute the location of the point where the electric field is zero
in a wire with a 1.09-mm2 cross-sectional area 5.17 times 1020 electrons flow past any point during 3.73 s. what is the
Which statements about a neutral atom are correct?
A small coil has a cross section of 5.5 cm2 and consists of 8 turns of wire. If the loop carries a current of 180 mA, what is the torque required to hold the loop
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