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Determine how long will it take a charged 80-mF capacitor to lose 20 percent of its initial energy when it is allowed to discharge through a 45-W resistor?
A plane flies at a speed of 100m/s relative to still air. There is a wind blowing at 40m/s, 55 degrees to the east of north. What is the speed of the plane relative to the ground?
A ladder 6.10 m long leans against the side of a building. If the ladder is inclined at an angle of 76° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
A lens is coated with material of indexof refraction 1.38. What thickness of coating should be used to give maximum transmission
A meterstick of negligible mass has a 0.25 kg mass at its 31 cm mark and a 0.40 kg mass at the 77 cm mark. Where should the fulcrum be so the meterstick is balanced
A motorist drives south at 28.0 m/s for 3.00 minute, then turns west and travels at 25.0 m/s for 2.20 minute, and finally travels northwest at 30.0 m/s for 1.00 minute. determine average velocity and speed
A solid sphere is released from rest and allowed to roll down a board that has one end resting on the floor and is tilted at 22° with respect to the horizontal. find the sphere's speed when it reaches the lowest end of the board
A tetherball leans against the smooth, frictionless post to which it is attached. The string is attached to the ball such that a line along the string passes through the center of the ball. What is the force the pole exerts on the ball
A 92 kg man climbs onto a car with worn out shock absorbers and this causes the car to drop down 4.5 cm. What is the mass of the car
the membrane that surrounds a certain type of living cell has a surface area of 5.1 x 10-9 m2 and a thickness of 1.9 x
A circular loop of wire of radius 18 cm moves at a speed of 6.6 m/s in the direction of a 0.13 T uniform magnetic field, What is the emf induced in the loop
An object was weighted in water, oil and alcohol. Its loss of weight in water was 75.0 gr.-wt., in oil 49.0gr.-wt., and in alcohol 60.0 gr.-wt. Find the Specific Gravity of the oil and the alcohol
A 3 g object undergoing simple harmonic motion given by: s =25m cos( t x 10/sec). Find the maximum kinetic energy for the motion given
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