What will eventually happen to a star after its formation is most affected by its initial
a. speed through space.
b. oxygen content.
c. uranium content.
d. anti-matter content.
e. mass.
e
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An airplane has a mass of 8,000 kg and is flying at 150 m/s in level flight. The airplane drops 1,000 kg of water on a fire below. The velocity of the airplane after dropping the water is
A. 50 m/s. B. 60 m/s. C. 75 m/s. D. 100 m/s. E. 150 m/s.
What combination of quarks produces a neutron and what are the electric charges on these quarks, expressed in terms of e?
What will be an ideal response?
Which pair are actually the same compound?
a. (CH3)3 N and CH3CH2CH2NH2 b. CH3CH2CH(NH2)CH3 and CH3CH(NH2)CH2CH3 c. CH3CH(Cl)CH3 and CH3CH2CH(Cl)CH3 d. CH3(CH2)2CH3 and CH3CH2CH(CH3)2 e. CH3CH2CH2NH2 and CH3CH2CH2N2H2
Emission nebulae like M42 occur only near stars that emit large amounts of
A) infrared heat. B) X-rays and gamma rays. C) microwaves. D) ultraviolet radiation. E) visible light.