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The hydraulic oil in a car lift has a density of 8.56 x 102 kg/m3. The weight of the input piston is negligible. The radii of the input piston and output plunger are 6.28 x 10-3 m and 0.199 m, respectively. What input force F is needed to support the 26400-N combined weight of a car and the output plunger, when (a) the bottom surfaces of the piston and plunger are at the same level, and (b) the bottom surface of the output plunger is 1.10 m above that of the input plunger?
The pulley system is used to lift a 61 kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. The crate is rising with an acceleration of 2.4 m/s2. Assume the masses of the ch..
A wheel turns with a constant angular acceleration of 0.600rad/s^2. Through how many revolutions does the wheel turn in this interval
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell.
A charge Q = 23.0 ?C is distributed evenly on a wire bent into an arc of radius R = 47.0 cm, What is the electric field at the center of the arc that subtends ? = ±40.0°
Over the course of a multi-stage 4280-km bicycle race, the front wheel of an athlete's bicycle makes 2.28 106 revolutions. How many revolutions would the wheel have made
A ray of light reflects from a plane mirror with an angle of incidence of 37. compute through what angle is the reflected ray rotated
A shell is shot with an initial velocity of 17 m/s, at an angle of ?0 = 60° with the horizontal. How far from the gun does the other fragment land
An idealized voltmeter is connected across the terminals of a 12.5-{\rm V} battery, and a 73.5-\Omega appliance is also connected across its terminals. What is the internal resistance of the battery?
A car travels along a certain road at an average speed of 46.51 km/h, Calculate the average speed for the round trip
If we want to have successive fringes on a screen 5.9 cm apart near the center of the pattern, where should we place the screen
A 7 L rigid (constant volume) container holds 0.81 moles of helium at an initial temperature of 75 oC. How many moles of gas will be in the container at the final temperature
a 4.6 kg dog stands on a 20 kg flatboat at distance D = 6.1 m from the shore. It walks 2.2 m along the boat toward shore and then stops. find how far the dog is then from the shore
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