Abaseball is seen to pass upward by a window 19 m high with a speed of 23 m/s. how long ago was the baseball thrown?

Gravity is a uniform accleration.  So I found the answer by using two of the formulas for uniform acceleration:

The first lets us find the initial velocity and the second lets us use that to get the time.  The first is:

Now using equation 2:

and solving this for t:

its c its is a mixture of gases

the higher the current the higher the mag field around it the higher the influence on the compass