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A certain substance has a dielectric constant of 2.8 and a dielectric strength of 18.0 MV/m. If it is used as the dielectric material in a parallel-plate capacitor, what minimum area should the plates of the capacitor have to obtain a capacitance of 9.00×10-8 F and to ensure that the capacitor will be able to withstand a potential difference of 4.5 kV?
A current-carrying wire passes through a region of space that has a uniform magnetic field of 0.76 T. determine the minimum current needed to levitate the wire
Sue and Sean are pushing on opposite sides of a 5.0kg box which is on a frictionless surface. What is Sean's force if the box accelerates away from Sue at 2.0m/s^2
A gunman standing on a sloping ground fires up the slope. The initial speed of the bullet is v0= 390 m/s. Find the maximum rangeof the bullet along the slope
A satellite moves in a circular orbit around Earth at a speed of 4714 m/s. Determine the satellite's altitude above the surface of Earth
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +8q. Sphere B carries a charge of -q. Sphere C carries no net charge. Spheres A and B are touched together and then separated.
A parachutist and her parachuting equipment have the combined mass of 121 kg. Her terminal velocity is 5.30 m/s with the parachute open. Her parachute has a cross-sectional area of 35.80 m^2. The density of air at that altitude is 1.23kg/m^3. What is..
A permanent magnet is hung from a string ( balanced ) and pointed in an East - West orientation and released. Describe its motion
In a ballistics test, a 22.0g bullet traveling horizontally at 1300m/s goes through a 30.0cm -thick 350kg stationary target and emerges with a speed of 900m/s, How long is the bullet in the target
A crate is sliding down a ramp that is inclined at an angle of 33.3° above the horizontal. Find the acceleration of the moving crate
A 23.2-mW laser beam of diameter 2.18 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
A box weighing 250-N is supported by the cable; the tension in the cable is 120-N. How much time elapses as box falls (starting from rest) 15.0 m.
A 100g wire is held under a tension of 250N with one end at x = 0 and other x = 10m. At time t = 0, pulse 1 is sent along the wire from the end at x = 10 m. At time t = 30 ms, pulse 2 is sent along the wire from the x = 0. At what position x do the..
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