What can be used to detect the powerful beams of cosmic microwave background radiation that can be detected on Earth? red giant magnets

circumpolar satellites

digital cameras

radio telescopes

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value