Which of the following types of galaxies have a disk and spheroidal component but lack spiral arms?
A) lenticulars B) ellipticals C) irregulars D) all of the above
A
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Addition by Components: Vector 
has magnitude 2 units and is directed to the north. Vector 
has magnitude 5 units and is directed to the south. Calculate the magnitude and direction of 
- 
.
A. 7 units, north B. 7 units, south C. 3 units, north D. 3 units, south
From Kepler's third law, a hypothetical planet that is twice as far from the Sun as Earth should have a period of _________________.
Fill in the blank(s) with the appropriate word(s).
When a mass of 0.350 kg is attached to a vertical spring and lowered slowly, the spring stretches a distance d. The mass is now displaced from its equilibrium position and undergoes 100 oscillations in 48.9 s. What is the stretch distance d?
A) 2.35 cm B) 2.97 cm C) 4.71 cm D) 5.94 cm E) 6.28 cm
Imagine that allele "A" of a gene is present on the maternal chromosome and allele "a" is present on the paternal chromosome. When do the alleles "A" and "a" get separated into daughter cells? Does this occur after meiosis I or meiosis II, and why?
What will be an ideal response?