A meter stick balances on a knife edge at the 50.0 cm mark. When two coins are stacked over the 13.1 cm mark, the loaded stick is found to balance at the 34.2 cm mark. A coin has a mass of 5.1 g. What is the mass (in kilograms) of the meter stick

In science and physics what is the standard unit of measure for speed?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?