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A force of 250N is applied to a hydraulic jack piston wth a0.1m diameter. If the output piston, which supports the load,has a diameter of .5m, how much weight can be lifted?
When the walkway exerts a load force of 9900 N on one of the support points, through what distance does the point move down?
Giancoli, page 30 --when they say that x-xo increases with the square of the initial speed. Why do they say square of initial speed only, what about square of final speed? And why do they ignore that the distance also decreases by a factor of 2.
A 1 m diameter wagon wheel consists of a thin rim having a mass of 9 kg, Determine the moment of inertia of the wagon wheel for rotation about its axis
Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, What is the emf of this solar cell
A 2.10kg snowball is fired from a cliff 8.55 m high with an initial velocity of 11.90 m/s, directed 47.0° above the horizontal. (a) Using energy techniques, find speed of the snowball as it reaches the ground below the cliff. What is that speed (b) i..
A 47.0-g golf ball is driven from the tee with an initial speed of 50.0 m/s and rises to a height of 25.6 m. Neglect air resistance and determine the kinetic energy of the ball at its highest point
A 3.8 kg ball is at rest on the floor in a 1.2 m ? 1.2 m ? 1.2 m room of air at STP. Air is 80% nitrogen (N2) and 20% oxygen (O2) by volume. What is the thermal energy of the air in the room
A water heater consisting of a metal coil that is connected across the terminals of a 17.0-V power supply is able to heat 140. mL of water from room temperature to boiling point in 70.0 s. What is the resistance of the coil?
Light in air is incident perpendicularly on a sheet of crown glass having an index of refraction of 1.522. Determine both the reflectance and transmittance
A wire carries a current of 9.0 A in a direction that makes an angle of 35.0° with the direction of a magnetic field, Find the magnetic force on a 6.00 m length of the wire
A long ladder weighing 100 N is rested against a smooth wall. find the magnitude of the normal force of the wall on the ladder
When a 19.7 kg wheel with an angular speed of 2.30 rad/s is disconnected from a motor, a 0.219 N · m frictional torque slows the wheel to a stop. how long will it take for the wheel to come to rest
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