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Two 2.3-cm-diameter-disks spaced 1.8 mm apart form a parallel-plate capacitor. The electric field between the disks is 4.6×105V/m.
a. What is the voltage across the capacitor? (Express your answer with the appropriate units.)
b. How much charge is on each disk? (Enter your answers numerically separated by a comma.)
c. An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.2×107m/s . What was the electron's speed as it left the negative plate?
(Express your answer with the appropriate units.)
In a transformer the energy is conveyed from primary to secondary by which means?
A 4.50 kg package slides 1.30 m down a long ramp that is inclined at 10.8° below the horizontal. Calculate the total work done on the package
A sound wave from a siren has an intensity of 92.5 W/m2 at a certain point, What is the intensity level of the sound wave due to the ambulance
A soap film whose index of re%uFB02ecetion is 1.33 is suspended in air. When sunlight strikes the film nearly perpendicularly, Find the thickness of the film
A cylindrical container with a cross-sectional area of 67.2 cm2 holds a fluid of density 756 kg/m3. Calculate what is the depth of the fluid
A dark fringe in the diffraction pattern of a single slit is located at an angle of θA = 38o. With the same light, the same dark fringe formed with another single slit is at an angle of θB = 62o. Find the ratio WA/WB of the widths of the two slits.
A boy of mass 35 kg and a girl of mass 40 kg are skating towards each other with speeds of 2.5 m/s, and 2.0 m/s respectively. Assume that there is no friction, and find their combined velocity after they meet
A laser produces a 3.10-mW beam of light, consisting of photons with a wavelength of 610.1 nm. (a) How many photons are emitted by the laser each second? photons/s (b) The laser beam strikes a black surface and is absorbed. What is the change in the ..
What are the necessary ingredients for a mid-latitude cyclonic storm to develop into a huge storm system and How does the polar-front jet stream influence the for-mation of a mid-latitude cyclone?
A 2m long pendulum with a mass of 250gr collides with a 95gr sticky ball seating in the pendulum's path and at the edge of a horizontal surface. The collision takes place while the pendulum is passing by its lowest point.
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 373 K. what is the mass of helium present
a surface completely surrounds a 3.9 10-6 c charge. find the electric flux through this surface when the surface is a
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