An operating 100.-watt lamp is connected to a
120-volt outlet. what is the total electrical en...
Physics, 30.08.2019 07:30 aesthetickait
An operating 100.-watt lamp is connected to a
120-volt outlet. what is the total electrical energy
used by the lamp in 60. seconds?
(1) 0.60 j (3) 6.0 × 10^3 j
(2) 1.7 j (4) 7.2 × 10^3 j
Answers: 1
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The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes
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Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.
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At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.
Answers: 1
Physics, 22.06.2019 21:20
16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.
Answers: 2
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