Looking at decibel scale tables on internet, a "quiet whisper 1 meter away" is generally reported to have a sound intensity of about 20 dB, while a jackhammer 3 meters away produces a sound of about 100 dB of intensity, so option a) could be the correct one.
However, the other options could be considered correct as well, because without knowing the exact sound power produced by the whisper or by the jackhammer it's impossible to calculate the exact sound intensity with precision, and since the values reported in the three options are very similar, all the three of them can be considered as valid.
1) An object with more mass has more gravitational pull.
2) The sun has more gravity than the Earth.
3) The gravitational pull of Earth causes the moon to orbit Earth.
4) The unbalanced force of gravity causes comets, meteors, and asteroids to collide with planets.
5) The force of gravity causes Earth to travel in a sideways path around the sun.
6) a. Most mass = Sun
b. Middle mass = Earth
c. Least mass = Moon
Answer: there are 6 atoms.
Explanation: 3 parts of Pb times 2 atoms per part = 6
good luck:)
