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A 0.482-kg toy car is powered by one D cell (1.50 V) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 47.1%, meaning that 47.1% of the electric energy applied to the motor is converted into translational kinetic energy. After 7.15 seconds, the car, which is initially at rest, reaches a speed of 2.89 m/s. What is the average current supplied to the car\'s motor.
The label on a 12.0-V truck battery states that it is rated at 150.0 A·h (ampere-hours). Treat the battery as ideal. How much electric energy can the battery supply
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.11 m2 and whose thickness is 3 mm. what is the percentage lost by the window
A 160 kg horizontal beam is supported at each end. A 300 kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports
An 6.60-cm-diameter, 370 g sphere is released from rest at the top of a 2.00-m-long, 19.0 deg incline. find the sphere's angular velocity at the bottom of the incline
explain why the expected number of counts is not an integer.a explain why the expected number of counts is not an
A wedge of mass M and angle α is resting on africtionless horizontal plane. A rectangular box of mass m is onthe wedge. determine the accelerations of the two bodies
A relatively loud sound can be created because a standing wave occurs in the bottle. Explain why the pitch of the sound becomes higher
A boy on board a cruise ship drops a 30.0 g marble into the ocean. what is the terminal speed of the marble
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him. What force does the winning player exert on the ground
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 3.93 m/s. Ignore frictional losses. What is the height of the hill
The cable supporting a 1950 kg elevator has a maximum strength of21920 N. What maximum upwardacceleration can it give the elevator without breaking
In each of the four scenarios to the right, a large bat lets out a short burst of ultrasonic sound, which the smaller bat hears a moment later. If the large bat flies at 14.60 m/s and the small bat flies at 4.520 m/s, rank the frequency that the s..
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