Looking at the elements that make up our world, which are the products of low versus high mass stars?
What will be an ideal response?
Much of the lighter material in the Earth's crust and our bodies, such as carbon, oxygen, and nitrogen, is the product of low mass stars and given off in planetary nebula, type I supernovae, and stellar winds around giants. But the denser elements of the mantle and core, especially silicon and iron, are delivered to the interstellar medium from the cores of high mass stars by violent type II supernovae.
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A 25-?F capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, with the two positive plates connected and the two negative plates connected. The final potential difference across the 25-?F capacitor is 36 V. What is the value of the capacitance of C?
A. 43 ?F B. 29 ?F C. 22 ?F D. 58 ?F E. 63 ?F
An object whose center of gravity is below its point of support, will be in neutral equilibrium
Indicate whether the statement is true or false
What evidence did Wegener use to support his hypothesis of continental drift?
A) sea-floor spreading B) paleoclimatic data C) polar reversals D) transform fault boundaries
It takes about ____ to travel from the earth to the moon
Fill in the blank(s) with the appropriate word(s).