Answer: a. People born when the Sun is in the constellation of Leo are more financially successful than other people.
Explanation:
Option A is the only claim that could be tested by scientific means. In this kind of a scientific study, we would need participants who were born when the Sun was in the constellation of Leo. We would then measure their financial success, in order to prove whether there is a particular correlation between the two. Other claims cannot be tested. For instance, we can never know what the final thoughts of Abraham Lincoln were, nor can we know whether God exists - some people chose to believe that he does and other that he does not. The question of whether blue is the best wall color depends on our personal preferences, and there is no universal answer.
Assuming that in space there are no external forces on the body,
Newton's first law of motion states that:
A body continues to be in rest or uniform motion not unless an external force is applied to change that state.
Therefore a resting body in space has to be shoved to change its state of rest to that of motion.
Dark matter is studied by astronomers by observing the effect it has on visible objects. This is because dark matter itself is not detectable. Astronomers think that some galaxies might have a lot of dark matter because of the unexplainable motion of stars in these galaxies.
Well, I'll try to write the formula in a way that's not confusing,
but I'm afraid it might be slightly confusing anyway.
When you're working with dB, the basic rule is
A change of 10 dB means either multiplying or dividing by 10 .
Multiply something by 10 ==> it increases by 10 dB.
Divide something by 10 ==> it decreases by 10 dB.
It turns out that another way to write all of this is . . .
An increase of 10 dB ===> multiply the original amount by 10¹
An increase of 20 dB ===> multiply the original amount by 10²
An increase of, say, 7 dB ===> multiply the original amount by 10⁰·⁷
A decrease of 10 dB ===> multiply the original amount by 10⁻¹
A decrease of 30 dB ===> multiply the original amount by 10⁻³
A decrease of, say, 13 dB ===> multiply the original amount by 10⁻¹·³
This question says: The sound increases by 5 dB .
That means the original 'intensity' or 'power' of the sound
is multiplied by
10⁰·⁵ = √10 = about 3.162 (rounded) .
From the choices listed, the closest one is (c).
Fragments and gamma<span> rays</span>