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Suppose we have an ‘ideal' parallel-plate capacitor, made of two metal plates in vacuum. If we insert a layer of plastic between the plates, does this cause the capacitance to increase or decrease?
A sort of "projectile launcher" is shown in Fig. 20-65. A large current moves in a closed loop composed of fixed rails, a power supply, and a very light, almost frictionless bar touching the rails. A magnetic field is perpendicular to the plane of th..
The spheres are brought into contact and then separated to a distance of 2.40 cm. Determine the magnitude of the force that each sphere now experiences, and state whether the force is attractive or repulsive.
A mass of 3kg, is sitting on a 34° incline and is connected by a massless string over a pulley in the shape of a hollow cylinder, estimate the acceleration of the system
a ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. it rebounds from the floor to reach a height of
A 1.2 kg coffee cup is accelerated at 3.0 m/s^2 in the direction shown, over a frictionless horizontal surface. Find the magnitude and direction (with respect to the positive x axis) of the third force, F3
A bullet with a mass m = 4.83 g and initial speed of 330 m/s passes through a wheel which is initially at rest, What is the angular speed of the wheel just after the bullet leaves it
A 0.20 kg billiard ball is thrown at a 45 degree angle upwards from the edge of a 12.192 meters tall building. What was the speed of the ball when it was launched
the displacement of a standing wave on a string is given by D = 2.8sin(0.70x)cos(55 t), Find the speed of a particle of the string
A batted baseball leaves the bat at an angle of 30.0^\circ above the horizontal and is caught by an outfielder 360 {\rm ft} from home plate at the same height from which it left the bat
Given: A 23.0\mu F capacitor is charged by a 135.0-V power supply, then disconnected from the power and connected in series with a 0.270-mH inductor.
Two identical clocks are set to 12 noon time when on the ground at rest relative to the ground. What will the moving clock read if the first clock reads 6 p.m.
Excluding fine and hyperfine transitions, do all transitions that end up in the ground state of hydrogen give ultraviolet light? Why? A brief explanation would be greatly appreciated
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