why are astronomers interested in building observatories capable of detecting neutrinos, cosmic rays, and gravitational waves?

Describe how ocean currents can affect a moving object ❕❕❕

What are the similarities and differences in the way geologists and biologists approximate the age of the earth? justify your response in two or more complete sentences.

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.