Suppose an adult blue whale is stranded on a beach. The whale, which lies
parallel to the shore, is 15 m from water deep enough for it to swim away in. A
group of people line up along the side of the whale to push it back into the
ocean. If the whale's weight is 1.5x 10° N, and the force of friction that must
be overcome by the people is 0.25 times the whale's weight, how much work
must the people do on the whale in order to return it to the ocean?
Answers: 1
Physics, 22.06.2019 05:30
What are similarities and differences of reflection, refraction, diffraction and absorption?
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Physics, 22.06.2019 15:20
Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?
Answers: 2
Physics, 22.06.2019 18:30
Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton
Answers: 2
Physics, 22.06.2019 22:00
Which statement best explains why the overall charge on an atom is zero?
Answers: 1
Suppose an adult blue whale is stranded on a beach. The whale, which lies
parallel to the shore, is...
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