A 2cm by 3cm by 4cm block of metal is placed on a balance, which reads 187.2g. What is the density of the metal block? 46.8 g/ccm 7.8 g/ccm 4.5 g/ccm 20.8 g/ccm ​

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.