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In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 41 N to the input piston, which has a radius r1. As a result, the output plunger, which has a radius r2, applies a force to the car. The ratior2/r1 has a value of 9.1. Ignore the height difference between the input piston and output plunger and determine the force that the output plunger applies to the car.
A coffee-maker contains a heating element that has a resistance of 34 ohms. What is the current in the heating element
The three resistors are identical with R1 = R2 = R3= 160 ?, and the battery voltage is 50 V. What is the current through resistor R2? R2 and R3 are parallel so these need to be treated with R1 as Requiv = R1+ (R2*R3)/R2+R3 but don't know where to ..
A wire coil is connected to a DC power supply of 12.0 volts. The current in the coil is measured to be 375 mA. What is the resistance of the wire coil
Jupiter is 23.10 m/s2. What is the ratio of your speed on Jupiter to your speed on Earth when you have dropped 45.0 m? Overlook the effects of air resistance and suppose that you start at rest.
A 5.60 uF parallel-plate air capacitor has a plate separation of 4.00 mm and is charged to a potential difference of 500V . Calculate the energy density in the region between the plates, in units of J/m^3
Pat (mass 53 kg) and Chris (mass 72 kg) sit in a 26-kg kayak at rest on frictionless water. What's the kayak's speed after Chris catches the pack
An outfielder makes a throw directly to home plate which is 94.2m away, Determine where the ball lands relative to home plate
An airplane is flying in a jet stream that is blowing at 45.0 m/s in a direction 18° south of east, What is the airplane's speed relative to the earth
A baseball batter swings the bat and applies a force of 36.38 N to the ball for a time of 0.31 s. what is the impulse on the ball
A 40.00-W eletric motor is able to accelerate a 8755 g car from rest to 30.00 mph in 31.10 seconds. Calculate the efficiency of the motor
At a waterpark, sleds with riders are sent along a slippery,horizontal surface by release of a large, compressed spring.The spring with a force constant k= 3700 N/m and negligible mass rests on the frictionless horizontal surface.
A 45 dB sound wave strikes an eardrum whose area is 4.1 × 10-5 m2. How much energy is received by the eardrum per second
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