Physics, 27.07.2019 04:00 christianlover20
Ellen needs to move a heavy box across the floor and then place it on a shelf that is four feet above the floor. which use of machines would most likely require the least amount of force in order to get the box on the shelf? a. sliding the box up an inclined plane to the shelf b. rolling the box up an inclined plane on a cart c. sliding the box across the floor and then lifting it using a pulley d. rolling the box across the floor in a cart and then using a pulley
Answers: 2
Physics, 21.06.2019 22:30
The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
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Physics, 22.06.2019 00:00
What type of nuclear decay causes the atomic number of an element to increase by 1?
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Physics, 22.06.2019 15:30
Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.
Answers: 1
Ellen needs to move a heavy box across the floor and then place it on a shelf that is four feet abov...
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