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A parallel-plate capacitor is to be constructed by using, as a dielectric, rubber with a dielectric constant of 3.20 and a dielectric strength of 25.0MV/m . The capacitor is to have a capacitance of 1.5nF and must be able to withstand a maximum potential difference of 5.00kV. What is the minimum area the plates of this capacitor can have?
A thin, uniform, metal bar, 3m long and weighing 85 N, is hanging vertically from the ceiling by a frictionless pivot. Find the angular speed of the bar just after the collision
a 5 kg mass is attached to the end of a 1.0-m string. The system is whirled in a horizontal circular path. What is the maximum speed of the mass if the string is not to break
The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 206 N. Find the length of the spring in this situation
As a 1240-kg truck travels up a 15.4-m-high hill, the nonconservative forces of friction and the force generated by the engine do work on the truck. determine the change in the truck's kinetic energy
The objective focal length is 2.00 cm and they eye piece focal length is 4 cm. Calculate the location of the final image and determine lateral magnification
A 0.80kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.1m on a frictionless horizontal surface. what is the maximum speed the ball can have
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest as in the figure below. The belt is a 160-turn coil. find the magnitude of the average induced emf in the coil during that time
You are driving north on 107th Avenue at a speed of 31.2 mph. At what frequency do you hear the siren
Calculate the photon energy for the H(game) line of the Balmer series for hydrogen
The Red Shift is evidence of an expanding Universe. A star like our Sun has a peak wavelength of 518 nm. If the star appeared to have a peak wavelength of 530 nm, find the rate of expansion (velocity) between that star and our Sun.
A professor's office door is 0.9 wide, 2.0 high, and 4 thick; has a mass of 25; and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame.
A coffee-maker (11 ?) and a toaster (16 ?) are connected in parallel to the same 120-V outlet in a kitchen. How much total power is supplied to the two appliances
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