Aby measuring seismic wave activity. a. seismograph c. tiltmeter b. mercalli scale d. none of the above

When you turn on a battery-operated device, an electrical circuit is

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.

Hi , i am new here can anyone me out with this question why is space black after having so many shining objects like sun , moon , stars