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Elevator-Scale Reading
1. What will the scale read if the elevator moves in free fall? (in kg)
2. What will the scale read if the elevator moves with downward acceleration 0.340g? (in kg)
3. What will the scale read if the elevator moves with upward acceleration of 0.340g? (in kg)
4. What will the scale read if the elevator moves with constant downward speed of 6.90 m/s? (in kg)
5. What will a spring scale read for the weight of a 63.9 kg woman in an elevator that moves with constant upward speed of 6.90 m/s? (in kg)
a family wishes to purchase a heat pump for their home. The get-it-cheap co. sells a heat pump that has an operating performance 38% of the coefficient of performance of an ideal Carnot heat pump. Compute the overall coefficient of performance for ..
A force of 29.73 N is applied tangentially to a wheel of radius 0.34 m. This force causes an angular acceleration of 1.20 rad/s2. What is the rotational inertia of the wheel
On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.15 m/s2. (a) What is the net force exerted on the trailer? (b) What force does the trailer exert on the car? (c) What is the net force acting on ..
a 55.0-turn circular coil of radius 5.40 cm can be oriented in any direction in a uniform magnetic field having a
a swimmer maintains a speed of 0.15ms relative to the water when he swims directly toward the opposite shore of a
A thin film of alcohol (n = 1.28) lies on a flat glass plate (n =1.54). What is the thickness of the film
A hoop and a disk, both of 0.36- m radius and 4.0- kg mass, are released from the top of an inclined plane 3.1 m high and 8.9 m long. What is the speed of the disk
The fundamental frequency of a closed organ pipe is 264.9 Hz. What is the length of the open pipe
A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 340 km/h in a semicircular arc with a radius of 194 m. Determine the radial acceleration of the car at this time
Suppose you wish to fabricate a uniform wire out of 2.6 g of copper. If the wire is to have a resistance of R = 0.25 and if all of the copper is to be used, what must be the length of the wire in m and the diameter of the wire in mm.
If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If a 4 cm piece of insulation is added to the pine ceiling , find the interface temperature for the pine and insulation.
A solenoid 1.30m long and 2.60cm indiameter carries a current of 18.0A. The magnetic field inside thesolenoid is 23.0mT. What is the length of the wire forming the solenoid
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