The μs between the clock and floor is 650(M*g) and the μk between the clock and the floor is 560(M*g)
Earth's atmosphere is a <em>mixture</em> of gases that have
not reacted to become chemical compounds.
Answer:
I just answered a question like this. It should be B. An electromagnet :)
Explanation:
About 50 years ago, mounting evidence was suggesting
that the temperature of Earth's surface has been sharply
increasing for the past couple of centuries. Nowadays,
additional evidence no longer suggests it; it confirms it.
Today's mounting evidence suggests that human activity is
responsible for the increase, but that the increase eventually
spells curtains for much of human activity.
