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A vertical 2-meter stick is placed on the ground so that y = 0.0 m is the point on the stick in contact with the ground. A camera is at the top of the stick (at y = 2.0 m) and is aimed at a flat vertical mirror 3.0 m away. An opaque sheet is placed over the bottom of the mirror. When the camera views the reflection of the stick, the top 0.8 m of the stick can be seen (that is y = 0 m to y = 1.2 m is hidden because of the sheet). What is the height h of the sheet?
question if the original electric field is 2.9010-4nc and the distance is reduced to one-half the original distance
A child of mass 24 kg sits 2.10m to the left of the center of a seesaw. The mass of the seesaw is 35 kg. How far to the right of the central pivot must a second child of mass 40 kg sit if the seesaw is to be perfectly balanced.
A waterpipe of radius 0.02 m delivers water at a flow rate of 0.01m^3/ s^1 at 20 degrees C. What is the average velocity of the water
The angular momentum of a flywheel having a rotational inertia of 0.250 kg·m2 about its central axis decreases from 2.80 to 1.800 kg·m2/s in 1.00 s. What is the average power of the flywheel
In 0.744 s, a 8.16-kg block is pulled through a distance of 4.47 m on a frictionless horizontal surface, starting from rest. By how much does the spring stretch
In the high jump, Fran's kinetic energy is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must Fran leave the ground
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 21.1 N. Find the magnitude of the net force exerted by the wire on the crooked tooth.
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to the spring and allowed to come to rest. It is then pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57.0 ..
a 2.1-m-long vertical pole extends from the bottom of a swimming pool to a point 50.0 cm above the water. What is the length in meters of the shadow of the pole on the level bottom of the pool
At 3.68100017 kHz the reactance in a circuit of a 9 microF capacitor and an inductor are equal in magnitude. What is the value of the inductor
An air bubble ascends from the bottom of a lake 14.3 m deep. How many times larger in volume is the bubble
a 120 ohm resistor is in series with a 0.140 h inductor and a 0.500 micro f capacitor.a compute the impedance of the
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