8. A jogger runs northward in a straight line with an average velocity of 5.0 m/s for 4.0 min and then with an average velocity of 4.0 m/s for 3.0 min.
a) What is her average speed?

b) What is her average velocity?

Avalue that describes how heavy an object is and is related to the force of gravity is

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units