Physics, 03.09.2021 07:40 jinxjungkook3
A meteorite of mass 1kg enters the Earth’s atmosphere and decelerates from 99m/s to 1m/s due to air resistance. What is the work done by the air?
A. 98J
B. 4900J
C. 9800J
D. 19600J
Answers: 2
Physics, 22.06.2019 23:40, redraider4915
Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)
Answers: 1
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