Rotation curves for spiral galaxies show:
A) they are slowing down.
B) rotation speed drops off further from the nucleus.
C) most have dark halos.
D) most of the mass lies in the nucleus.
E) no relation to mass.
C
Physics & Space Science
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A.) 40%. B.) 50%. C.) 60%. D.) 70%. E.) 80%.
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The walls of cells are referred to by biologists as
A) linings B) coats C) shells D) membranes
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Compounds of carbon are classified as ______________ compounds
Fill in the blank(s) with correct word
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If the number of disease-causing bacteria can grow exponentially in the body, why don't all people succumb to them at an early age?
What will be an ideal response?
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