Chemistry
Chemistry, 22.07.2019 05:00, swaggernas

Machines are never 100 percent efficient because some work is used to overcome friction and inertia. true false

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Mathematics, 22.06.2019 07:30, gabbee
The ideal mechanical advantage of a machine reflects the increase or decrease in force there world be without friction, it is always greater than the actual mechanical advantage because all machines must overcome friction. true false
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Physics, 28.06.2019 21:00, lexhorton2002
Which of the following statements is true? friction moves in the same direction as motion some machines are 100 percent efficient. power measures the speed at which work is done. windmills change circular motion into straight motion.
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Biology, 23.07.2019 02:00, makalanharrison
True or false: 1. from a scientific point of view, if you push on a large boulder, but it does not move, you still have done work. 2. machines save us work. 3. the main cause of inefficiency of machines is friction. 4. fossil fuels are used to produce plastic. 5. the most abundant fossil fuel is petroleum. 6. deforestation is largely due to farming.
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Biology, 30.07.2019 21:00, salsa456
True or false? theoretically an object would keep going forever on a friction-less surface if it was given a hard-enough push to overcome its inertia and there was no air resistance.
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Machines are never 100 percent efficient because some work is used to overcome friction and inertia....

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