Physics Solutions Library

Physics Solutions Library

Access over 4,483 Physics video and text solutions to help you complete your homework.

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4,483 solutions

Power

Q. For saving energy, bicycling and walking are far more efficient means of transportation than is travel by automobile. For example, when riding at 1...

Solved • Oct 18, 2018

Net Work & Kinetic Energy

Q. An older-model car accelerates from 0 to speed v in a time interval of Δt. A newer, more powerful sports car accelerates from 0 to 2v in the same t...

Solved • Oct 18, 2018

Power

Q. An energy-efficient lightbulb, taking in 28.0 W of power, can produce the same level of brightness as a conventional lightbulb operating at power 1...

Solved • Oct 18, 2018

Power

Q. A certain rain cloud at an altitude of 1.75 km contains 3.20 x 107 kg of water vapor. How long would it take a 2.70-kW pump to raise the same amoun...

Solved • Oct 18, 2018

Power

Q. When an automobile moves with constant speed down a highway, most of the power developed by the engine is used to compensate for the energy transfo...

Solved • Oct 18, 2018

Power

Q. The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 ms. The total mass of the train is 875 g.(a) Find the mini...

Solved • Oct 18, 2018

Power

Q. An 820-N Marine in basic training climbs a 12.0-m vertical rope at a constant speed in 8.00 s. What is his power output?

Solved • Oct 18, 2018