Silicates are the most abundant minerals because
What will be an ideal response?
silicon and oxygen are the two most abundant elements in Earth's crust, and they form an extremely strong bond.
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A mass is attached to a spring of spring constant 60 N/m along a horizontal, frictionless surface. The spring is initially stretched by a force of 5.0 N on the mass and let go
It takes the mass 0.50 s to go back to its equilibrium position when it is oscillating. What is the period of oscillation? A) 0.50 s B) 1.0 s C) 1.5 s D) 2.0 s E) 2.5 s
A continuous spectrum is produced by ____
a. atoms that become ionized b. electrons that transfer from a high energy level to a low energy level c. electrons that transfer from a low energy level to a high energy level d. the intensity of agitation of atoms in a hot gas e. the motion of an object toward or away from the observer
Conservation of Momentum: Consider two less-than-desirable options. In the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. In the second option you are driving 30 mph and crash head-on into a stationary brick wall. In neither case does your car bounce back from the thing it hits, and the collision time is the same in both cases. Which of these two situations would result in the greater impact force on your car?
A. hitting the other car B. hitting the brick wall C. The force would be the same in both cases. D. None of these choices are correct.
According to the HST data, very distant (and early) galaxies tend to be:
A) larger and bluer that modern galaxies. B) nothing but quasars. C) smaller, bluer, and more irregular than modern ones. D) redder, due to the recession of the universe. E) very well formed into clusters of nothing but spirals.