Physics, 09.10.2019 22:20 barbaragomez27
Who has a greater weight to mass ratio, a person weighing 400 n or a person weighing 600 n? select one:
a. the question can't be answered; not enough information is given.
b. neither; their ratios are the same.
c. the person weighing 400 n
d. the person weighing 600 n
Answers: 1
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Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.
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Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?
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