Physics, 22.05.2020 22:00 ckenyewildon
Charlotte built a simple electromagnet, shown below. She found that the electromagnet picked up the entire pile of paper clips the instant she turned it on. Which of the following might allow Charlotte’s electromagnet to pick up a single paper clip at a time?
Answers: 3
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A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?
Answers: 2
Physics, 22.06.2019 15:20
Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.
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If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.
Answers: 1
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Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.
Answers: 1
Charlotte built a simple electromagnet, shown below. She found that the electromagnet picked up the...
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