What type of civilization would be able to construct a "Dyson Sphere" around its parent star to capture its radiation?
A) Type III
B) Type IV
C) Type II
D) Type I
C
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A model car is propelled by a cylinder of carbon dioxide gas. The cylinder emits gas at a rate of 4.5 g/s with an exit speed of 80.0 m/s. The car has a mass of 200 g, including the CO2 cylinder. Starting from rest, what is the car's initial acceleration?
a. 0.90 m/s2 c. 9.0 m/s2 b. 1.8 m/s2 d. 36 m/s2
This painting represents the Sun and planets (and two dwarf planets) of our solar system. What is not to scale in this painting?
A) The sizes of the planets are not correctly scaled compared to each other or the Sun. B) The distances between the planets are not shown to scale. C) The Sun is too big compare to the planets. D) Everything is correctly scaled, but the planets are shown in the wrong order from the Sun. E) Neither distances nor sizes are correctly scaled.
The corona can only be glimpsed from Earth during a(n) ________
Fill in the blank(s) with correct word
Which type of reaction is Zn + 2HCl ? ZnCl2 + H2?
a. Decomposition b. Combination c. Double-replacement d. Single-replacement