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A 3 x 10^2 kg piano is being lifted at a steady speed from groundlevel straight up to an apartment 10.0 m above the ground. Thecrane that is doing the lifting produces a steady power of 4.00 x10^2 W. How much time does it take to lift the piano?
a. 73.5 sb. 64.7 sc. 55.1 sd. 69.5 se. 60.0 s
You are driving to the grocery store at 24 m/s. You are 115 m from an intersection when the traffic light turns red. Suppose that your reaction time is 0.50 s and that your car brakes with constant acceleration. How far are you from the intersecti..
What is the work completed by the block and tackle system?
a pair of narrow parallel slits separated by a distance of 0.294 mm are illuminated by the green component from a
a wheel of radius 0.2 m and moment of inertia 0.05 kgmcirc2 is mounted on a horizontal frictionless axle. a massless
a parachutist relies on air resistance mainly on her parachute to decrease her downward velocity. she and her parachute
A diffraction grating has a line density of 580 . This grating produces a 1st order maximum at a distance of 2.52 from the central maximum on a screen which is 5.40 away
The plates of a parallel-plate capacitor are 3.00mmapart, and each carries a charge of magnitude 75.0nC. The plates are in vacuum. What is the area of each plate
An initially uncharged air-filled capacitor is connected to a 4.01-V charging source, Find the capacitor's potential difference and charge after the insertion
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 55 A. If the bird's feet are 3.9 cm apart, calculate the potential difference between its feet. (Th..
A block of iron at 43.0°C has mass 2.30 kg. If 3.50×104 J of heat are transferred to the block, what is its resulting temperature
A car moves with an initial velocity of 5m/s and is subjected to a deceleration of 3m/s2 for 2 seconds. Calculate the distance the car traveled
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. What is the angular acceleration in the second training exercise
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