The half life of uranium-235 is 4.5 billion years. If 0.5 half-lives have elapsed, how many years have gone by? a.9 billion
b.2.25 billion
c.4.50 billion
d.4.0 billion

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Which type of basaltic lava flow has a fairly smooth

Decreased sensitivity to an unchanging stimulus is known as