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A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 1.4 cm away, in a time 2.1 times 10-7 s. What is the magnitude of the electric field?
An aluminum wire having a cross-sectional area equal to 5.10 10-6 m2 carries a current of 3.50 A. Find the drift speed of the electrons in the wire
A bartender slides a beer mug at 1.30 m/s towards a customer at the end of a frictionless bar that is 2.0m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar.
Find out the magnitude and direction of forces
The potential at the center of a uniformly charged ring is 52 kV, and 15 cm together the ring axis the potential is 41 kV. Find the ring's radius and its total charge.
During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires, How long does the car take to stop completely in seconds
Suppose the rotational kinetic energy of a solid disc is 1000 J when the disk has an angular velocity of 3 rad/s. What is the disk's moment of inertia
In recent years, a number of nearby stars have been found to possess planets. Find the mass of the star
Coherent light with wavelength 591nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3m from the slits. The first-order bright fringe is a distance of 4.84mm from the center of the central b..
A figure skater is spinning with an angular velocity of +13 rad/s. She then comes to a stop over a brief period of time. Determine the time during which she comes to rest
A thermodynamic system undergoes a process in which its internal energy increases by 480 J. find the energy transferred to or from it by heat
A 28-m3 tank is filled with 2910 moles of an ideal gas. The temperature of the gas is initially 302 K, but it is raised to 740 K. find the change in the pressure of the gas inside the tank
A 1200 turn coil of wire that is 3.00 cm in diameter is in a magnetic field that drops from 0.750 T to 0 T in 15.0 ms. What is the induced emf in the coil
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