A flywheel with a moment of inertia 6.00 × 106 kg?m2 is spinning with an angular speed of 120 rev/s about a vertical axis while it sits at the north pole. The disk is turning counterclockwise when viewed from above
The disk is brought to a rest. Treat the earth as a uniform sphere with a mass 5.976 × 1024 kg and a radius 6.374 × 106 m. (a) What will be the magnitude of the change in angular momentum of the earth? (b) What will be the change in length of a day on Earth?
(a) 4.52 × 109 kg?m2/s
(b) 5.53 × 10-20 s
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When an electron transitions from a higher orbital level to a lower orbital level, a photon is ______
a. absorbed b. transitioned to somewhere else in that same orbit c. emitted d. None of the other choices are correct as a photon is not a product of or source to the transition.
The best places for life to have formed on Earth are believed to have been
a. near the south pole in places where water is frozen solid as ice. b. on the continent of Africa in the areas with no water. c. in liquid water, probably in the oceans or pools of water.
One idea for interstellar spacecraft involves harnessing energy from nuclear bombs detonated in space
Indicate whether the statement is true or false
Deep Seated Landslides
What will be an ideal response?