Why is the impact theory now preferred as an explanation for the Moon's origin?
What will be an ideal response?
The capture theory is unlikely for a body as big as the Moon, while the coformation theory would have the Moon orbit our equator as it condensed. The impacting body would be of different composition than the Earth, and the heat of impact would drive off the lighter materials, as noted for the Moon's crust. The body would also have been moving in the ecliptic plane before impact, and the Moon still orbits close to the ecliptic even now.
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A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 28.8% and that of C is 14.2%, what is the percentage by mass of O?
a. 16.0% b. 57.0% c. 43.0% d. 22.5% e. None of the above
Which statement is true about Newton's First law of motion?
A. A body in motion has the tendency to come to a stop eventually. B. A body at rest stays at rest unless a force is applied to it. C. A body at rest stays at rest unless a force is applied to it and a body in motion stays in motion unless a force is applied to it. D. A body in motion stays in motion unless a force is applied to it. E. A body at rest stays at rest unless a force is applied to it and a body in motion has the tendency to come to a stop eventually.
At higher altitudes water boils at ________ temperature as/than at sea level
A) a lower B) a higher C) the same
Different colors correspond to electromagnetic waves of different
A) frequencies. B) speeds. C) amplitudes. D) weights. E) intensities.