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When a 370 nF air capacitor (1 nF =10-9 F) is connected to a power supply, the energystored in the capacitor is 1.85 10-5 J. While the capacitor is kept connected to the power supply, a slab ofdielectric is inserted that completely fills the space between the plates. This increases the stored energy by 2.36 10-5 J.a) What is the potential difference between the capacitor plates?b) What is the dielectric constant of the slab?
A small button placed on a horizontal rotating platform with diameter 0.328 will revolve with the platform, How far from the axis can the button be placed, without slipping, if the platform rotates at 62.0
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
When a softball player swings a bat, she accelerates it from rest to an angular velocity of 10 rad/s in a time of 0.26792 seconds. What is the magnitude of the torque she applies to the end of the bat? Model the bat as a uniform rod of length 0.90 m ..
Sheena can row a boat at 3.03 mi/h in still water. She needs to cross a river that is 1.10 mi wide with a current flowing at 1.55 mi/h. How long does it take her to cross the river
A wheel rotates with a constant angular acceleration of 4.35 rad/s2. Suppose that the initial angular speed of the wheel is 2.99 rad/s. Elucidate through what angle does the wheel rotate after 2.88 s?
a spring is pressed against a wall so that it is compressed by 0.25 m (ie it is 0.25 m shorter than its equilibrium length). what is the speed at which the spring leaves the wall
Moon effect. Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. By what percent does your weight (as measured on a scale) decrease
A comet has a very elliptical orbit with a period of 121.0 y. what is its greatest distance from the Sun
Sirius B is a white star that has a surface temperature (in kelvins) that is four times that of our sun. Sirius B radiates only 0.040 times the power radiated by the sun. Our sun has a radius of 6.96 × 108 m. Assuming that Sirius B has the same emiss..
A 7.40-nC charge is positioned 1.70 m from a 4.80-nC charge. (a) Find the magnitude of electrostatic force that one particle exerts on the other. (b) Is the force attractive or repulsive.
A panicular spring has a spring constant of 86 N/m and a mass of 0.548 kg at its end. When the spring is driven in a viscous medium, the resonant motion occurs at an angular frequency of 12.2 rad/s.
Two water reservoirs are open to the atmosphere. The manometer contains mercury with the density of 13,600kg/m cubed. What is the difference in elevation if the manometer reading is 25cm.
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