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1. You want to use a lever to lift a dumpster that weighs 5200 N. You arrange the lever so that it is approximately horizontal and makes contact below the dumpster's center of mass at a distance of 0.40 m from the lever's pivot. About how much torque will the dumpster exert on the lever?
2. You are positioned 2.50 m away from the pivot on the other side of the lever. With what approximate force must you push down on the lever in order to lift the dumpster?
After hitting a long fly ball that goes over the rightfielder's head and lands in the outfield, the batter decides tokeep going past second base and try for third base. how much workwas done on the player by friction
q1. collapsible plastic bags are used in hospitals for infusions. we want to use such a bag to infuse an electrolyte
When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). find the mass of the ball
The speed of a light wave in a certain transparent material is 0.581 times its speed in vacuum, which is 3.00 × 108 m/s. What is its wavelength in nanometers
What is the frequency of the note played by this pipe.
A block with mass mA = 15.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 4.5kg which hangs vertically. Determine the magnitude of the acceleration of the system
a physics professor demonstrates the doppler effect by tying a 600hz sound generator to a 1.0-m-long rop, what are the highest and lowest frequencies heard by a student in the classs room
A plate carries a charge of -2.55μC, while a rod carries a charge of +2.03μC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge.
question a solid sphere is rolling without slipping along a horizontal surface with a speed of 5.50 ms when it starts
Two blocks of mass mA and mB, resting on africtionless table, are connected by a stretched spring and thenreleased. (a) Is there a net external force on the system? (b) Determine the ratio of their speeds, vA/vB.
For either type of coefficient of friction, what is generally assumed about the dependence of the value of the coefficient on the area of contact between the two surfaces?
A photon corresponding to a particular frequency of blue light produces a transition from the n = 2 to the n = 5 level of a hydrogen atom. Could this photon produce the same transition (n = 2 to n = 5) in an atom of X? Explain.
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