You push really hard against a round rock, but you cannot make it roll. Which statement best explains why you cannot move the rock
(A)Gravity pulls the rock toward the center of Earth.
(B)The forces between you and the rock are balanced.
(C)The force of your push is greater than the opposing force.
(D)There is no friction to help you move the object.
Answers: 2
Physics, 22.06.2019 19:50, fili20
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 23.06.2019 01:30, michellermccarty
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Answers: 1
Physics, 23.06.2019 07:00, bankskry
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Answers: 2
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