Does the fact that the mantle is beneath the crust necessarily mean that the mantle is denser than the crust? Explain
What will be an ideal response?
Answer: The differential separation of elements during Earth's formation resulted in heavier elements migrating toward the center of the planet and lighter elements floating to the surface. So yes, the greater density of the mantle contributes to its position beneath the crust.
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How does the explosion of a nuclear bomb provide evidence for the theory of relativity?
A) The bomb converts rest-mass energy into thermal energy in accord with E = mc2, which is part of the theory of relativity. B) The mass of the bomb when it explodes is much greater than its normal mass. C) The bomb causes things in its vicinity to move at high speeds, allowing scientists to measure effects of time dilation. D) The bomb shortens the lifetimes of all people who happen to be near it when it detonates.
In nuclear magnetic resonance, nuclei absorb energy when flipping between nuclear
a. mass states. b. spin states. c. charge states. d. decay states. e. isotope states.
If the plane x = 4 m is an equipotential surface, in which of the following directions can the electric field be in the region immediately adjacent to this plane?
a. the positive y direction b. both the positive and negative z directions c. the positive x direction d. more than one of these choices
A hammer is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration of object in free fall is 3.5 m/s2 and there is no atmosphere. What is the speed of the hammer after 8.0 s?
A) 7.0 m/s B) 14 m/s C) 21 m/s D) 64 m/s