What is the amount
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According to the nebular theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system?
A) because only metal and rock could condense in the inner solar system, whereas ice also condensed in the outer solar system B) because the Sun's gravity was stronger in the outer solar system, allowing more solid material to collect C) because gas in the outer solar system contained a larger proportion of rock, metal, and hydrogen compounds than the gas in the inner solar system D) because only the outer planets captured hydrogen and helium gas from the solar nebula
If the net flux through a closed surface is zero, then there can be no charge or charges within that surface
Indicate whether the statement is true or false
A rocket with an initial mass of 1000 kg adjusts its thrust by varying the rate at which mass is ejected. The ejection speed relative to the rocket is 40 km/s. If the acceleration of the rocket is to have a magnitude of 20 m/s2 at an instant when its mass is 80% of the original mass, at what rate is mass being ejected at that instant? Ignore any external forces on the rocket.
A. 0.40 kg/s B. 0.50 kg/s C. 0.60 kg/s D. 0.70 kg/s E. 0.80 kg/s
Which of the following is not a method of producing nuclear fusion?
a. heating a magnetically confined plasma b. forcing nuclei together using lasers c. cooling nuclei to very cold temperatures d. forcing nuclei together with a nuclear fission explosion