Write a balanced nuclear equation for the reaction in which oxygen -15 undergoes positron emission

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

If the new moon happens on january 15th, what shape will it be on february 6th?

Which of the following examples illustrates static friction? a box sits stationary on a ramp. a ball rolling on the lawn eventually comes to rest. a car rounds a curve on a road. a fish swims upstream.