14) A ball rolls of a table with a velocity of 1.8 m/s. The table is 2.2 m high. How fast was it moving vertically just before it hit the
floor?

Atomic nuclei of almost all elements consist of

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Could we see a galaxy that is 20 billion light-years away?