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A spherical cavity of radius 4.50 cm is at the center of a metal sphere of radius 18.0cm. Determine the electric field at a point 6.0 cm from the center of the cavity.
A wire with a resistance of 7.1 Ω is drawn out through a die so that its new length is 3 times its original length. Find the resistance of the longer wire, assuming that the resistivity and de
What is the maximum amount by which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 60.0 u mass? (1 u = 1.66 x 10-27 kg)."
You discharge the capacitor through a 4.77-Ω resistor. What is the time constant? After what multiple of the time constant does the potential difference reach 2.47 V?
What is the current in amperes in a wire of radius R = 2.91 mm if the magnitude of the current density is given by (a) Ja =J0r/R and (b) Jb = J0(1 - r/R) in which r is the radial distance and J0 = 5
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250-kg crate. What is the acceleration of the crate if the 750-N force is maintained after
A diver 32 m deep in 8°C fresh water exhales a 1 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 25°C? Hint: Ass
Suppose you discover a Type Ia supernova in a distant galaxy. At maximum brilliance, the supernova reaches an apparent magnitude of +10. How far away is the galaxy?
Neglecting fringing, find (a) the potential difference (in V) between the plates, (b) the initial stored energy, (c) the final stored energy, and (d) the work required to separate the plates.
A barge has vertical sides and a flat bottom of 320ft^2 area. when partially filled, the barge is immersed in fresh water to a depth of 2.00 ft. upon removal of the load the barge rises 16.0 in. (a)
The paper dielectric in a paper-and-foil capacitor is 8.00×10-2 {rm mm} thick. Its dielectric constant is 2.50, and its dielectric strength is 50.0 {rm MV}/{rm m}. Assume that the geometry is
A charged isolated metal sphere of diameter 11 cm has a potential of 9000 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.
A particular circuit contains three lamps. Lamp A turns off when lamp B is turned off, but stays on when lamp C is turned off. Lamp C stays on either lamp A or lamp B is turned off. Draw a circuit
A force is applied to a 1kg mass and produces 5.5 m/s/s acceleration. What acceleration would be produced by the same force applied to a 6.6kg mass?
The coil spin at a rate 6 times larger than the rate at which you turn the crank. What is the maximum emf you can expect to get out of this generator?
At t = 0 the coordinates of a particle are x = 0, y = 2.02 m. At a time 0.90 s later, its coordinates are x = 3.06 m, y = 4.08 m. Find the components of the particle's average velocity during this
A flat (unbanked) curve on a highway has a radius of 220.0 m. A car rounds the curve at a speed of 25.0 m/s. (a) What is the minimum coefficient of friction that will prevent sliding?
What is the force exerted by the floor on the 15.0-lb block? (c) If we replace the 10.0-lb object in part (b) with a 20.0-lb object, what is the force exerted by the floor on the 15.0-lb block?
assume an electron gun in a TV uses a potential difference of 50,000 Volts to accelerate an electron from a dead stop to a final velocity. The electron then hits a phosphor on the TV screen, making
Find the average magnitude of the induced emf if the change in shape occurs in 4.25 and the local 0.126- magnetic field is perpendicular to the plane of the loop.
A wavelength of 486.2 nm is emitted by the hydrogen atoms in a high-voltage discharge tube. What are the (a) initial and (b) final values of the quantum number n for the energy level transition tha
The bottom of a box has a surface area of 31.4 cm2. The mass of the box is 47.1 kilograms. Acceleration due to gravity at sea level is 9.80 m/s2. What pressure is exerted by the box where it rests?
The incident beam of light is unpolarized and has an intensity of 1430.0 W/m2. What is the intensity of the beam transmitted through the three sheets when 1 = 19.0°, 2 = 46.5° and 3 = 100.0&
A parallel-plate capacitor is formed from two 9.10cm x 9.10cm electrodes spaced 2.00mm apart. The electric field strength inside the capacitor is 5.00*10^6 . What is the charge (in nC) on each elect
Two particles are fixed on an x axis. Particle 1 of charge 40 micro-coulombs is located at x =-2.0cm; particle 2 of charge Q is located at x = 3.0 cm. Particle 3 of charge magnitude 20 micro-coulom