4) According to the studies cited in the articles you just read, how much greater is the current extinction rate than the average background extinction rate of the last 542 million years?
A. 0-5 times greater than the background rate
B. 5-10 times greater than the background rate
C. 50-75 times greater than the background rate
I
D. 100-1000 greater than the background rate
E. 100,0000-1,000,000 times greater than the background rate

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?