A boy jumps with a velocity of magnitude 20.0 m/s at an angle of 25.0° above the horizontal. What is the horizontal component of the boy's velocity?
A) 18.1 m/s
B) 15.6 m/s
C) 8.45 m/s
D) 12.6 m/s
E) 9.33 m/s
A
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A(n) _________is a material added to a polymer to lower the glass transition temperature.
Fill in the blank(s) with the appropriate word(s).
Why do terrestrial planet cores contain mostly metal?
A) The entire planets are made mostly of metal. B) Metals condensed first in the solar nebula and the rocks then accreted around them. C) Metals are denser than rocks, so they sank to the center when the interiors were molten. D) Radioactivity created metals in the core from the decay of uranium. E) Convection in the mantle carried the metals to the core.
Material that is transported and deposited by ice is called ______________
Fill in the blank(s) with correct word
Which types of galaxies have a halo component?
A) spirals only B) ellipticals only C) irregulars only D) both spirals and ellipticals