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A 4.4-nF parallel plate capacitor with a sheet of Mylar (? = 3.1) filling the space between the plates is charged to a potential difference of 180 V and is then disconnected. (The initial capacitance including the dielectric is 4.4 nF.)(a) How much work is required to completely remove the sheet of Mylar from the space between the two plates?(b) What is the potential difference between the plates of the capacitor once the Mylar is completely removed?
You're taking a self portrait in the mirror using a camera. If you stand 5.7 m away from the mirror and you see your face in focus. What distance will that scale show
A spaceship of mass m is located between two planets of masses M1 and M2; the distance between the two planets is L, What is the position of the spacecraft
At what angle does it leave the field region?
q1. an ideal gas is expanded isothermally from 20 l to 30 l. throughout this process 6 j of energy is expended by the
A 54.5-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.646 and 0.321, respectively. What horizontal pushing force is required to just start the crate moving
Three 13cm long rods form an equilateral triangle. Two of the rods are charged to + 19nC, the third to - 19 nC. What is the electric field strength at the center of the triangle
Water is lifted out of a well 22.0m deep by a motor rated at 1.40hp .Assuming efficiency 90% , how many kilograms of water can be lifted in 1 min
Suppose a 32.3 V battery is connected to a long cylindrical wire, and a current of 2.44 A flows. Find the work done by this battery to push one electron through the entire length of the wire
A duck is floating on a lake with 21% of its volume beneath the water. What is the average density of the duck
A roller coaster is traveling along a vertical circular loop, How much work is done by the frictional force from Position 1 to Position 2
When a potential difference of 12V is applied to a wire 6.6m long and 0.35mm in diameter the result is an electric current of 2.1A
A box (m1=1.2 kg) is being pulled up an (not necessarily frictionless) incline by another mass (m2=0.85 kg), which is descending straight down. How much energy did the hanging mass lose
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