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Q. Two parallel plates, each with an area of 100 cm^2 , are given charges of equal magnitudes 8.9 X 10^-7 C but opposite signs. The electric field within the dielectric material filling the space between the plates is 1.4 X 10^6 V/m. (a) Calculate the dielectric constant of the material. (b) Determine the magnitude of the charge on each dielectric surface.
Q. For the normal force in the figure to have the same magnitude at all points on the vertical track, the stunt driver must adjust the speed to be different at different points. Suppose, for example, that the track has a radius of 3.5 m and that the driver goes past point 1 at the bottom with a speed of 17 m/s. What speed must she have at point 3, so that the normal force at the top has the same magnitude as it did at the bottom?
A total of 34 bright and 34 dark Newton's rings (not counting the dark spot at the center) are observed as 550 -nm light falls normally on a planoconvex lens resting on a flat glass surface. How much broad is the center than the edges.
A vertical scale on a spring balance reads from 0 to 175. The scale has a length of 12 from the 0 to 175 reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.8.
A cricket ball is bowled at a speed of 144 km/hr. suppose the ball diameter is 70 mm and a drag coefficient 0.45, estimate the drag force in newtons which would be acting on the ball.
Sally travels by car from one city to another. She drives for 24 min at 63.0 km/h, 52.0 min at 42.0 km/h, and 18.0 min at 81.0 km/h, and she spends 5 min eating lunch and buying gas.
A box of mass 15 kg is dragged by a 50 N horizontal force a distance of 10 m over a rough surface with the coefficient of friction = 0.14 the work done by friction force.
A 10 ball of clay traveling east at 9 collides and sticks together with a 40 ball of clay traveling north at 6.5. What is the speed of the ball of clay.
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.
How much force is needed to hold a 7.0 cm diameter hose delivering 440 L/min through a 0.73cm diameter nozzle.
A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 56° above the horizontal. The weight of the ladder is 35 pounds. A 77 lb boy climbs 6.0 ft up the ladder. What is the magnitude of the friction force exerted on the lad..
The pilot of an aircraft wishes to fly due west in a 34.60 km/h wind blowing toward the south. The speed of the aircraft in absence of a wind is 145 km/h.
Consider N atoms confined on a surface of area A at temperature T. The atoms form a two-dimensional (2D) gas of classical, non interacting particles.
A pipe open at one end has a fundamental frequency of 256 Hz. A second pipe,identical to first pipe, is shortened by cutting off a portion of the open end. When both pipes vibrate at their fundamental frequencies, a beat frequency of 12 Hz is heard..
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