What statistic below has changed the most in the last decade?
A) the compositions of moons of Uranus
B) the number of known Jovian moons
C) the rotational period of the Jovian moons
D) the masses of the Galilean moons
E) the densities of the larger moons
B
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Which of the following best describes the fundamental difference between two different chemical elements (such as oxygen and carbon)?
A) They have different numbers of protons in their nucleus. B) They have different names. C) They have different numbers of electrons. D) They have different atomic mass numbers.
Differentiate between raster and vector images.
What will be an ideal response?
To determine the mass of a car, a student (with a friend at the wheel) pushes the car holding a bathroom scale between himself and the car and carefully maintains a constant reading of 400 N on the scale while the car accelerates on level ground
At the conclusion of the experiment his friend reports that the car accelerated from rest to 14.0 km/hr in 12.0 s. What was the mass of the car? A) 343 kg B) 1230 kg C) 2460 kg D) 3360 kg E) 3430 kg
What does the CNO cycle and the hydrogen proton-proton cycle have in common? Choose the best answer to the question
A) They both trigger at the same temperature. B) They both are ways to fuse hydrogen nuclei to make helium. C) They are both cycles in star lives. D) They are both nuclear reactions; the CNO cycle makes carbon, nitrogen, and oxygen, and the proton cycle makes helium.