How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors? a. They have one or two valence electrons, so they cannot lose electrons easily.

b. They have one or two valence electrons, so they can lose or gain electrons.

c. They have three to six valence electrons, so they cannot lose electrons easily.

d. They have three to six valence electrons, so they can lose or gain electrons

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?