A book is sitting on a table. the force exterted on the book by the table is equal to the book's? (a) friction force

(b) tension force

(c) mass

(d) weight

How does convection affect our atmosphere? our layers of earth? our oceans?

In physics the desire of an object to keep doing what it is doing is termed?

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.