Jj thomson's cathode-ray tube experiment showed which of the following? a. matter can be neither created nor destroyed b. atoms are small individual spheres c. electrons are in a cloud surrounding positively charged particles d. atoms consist of at least some negatively charged particles

Metallic bonds are good conductors of electricity true or false

Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments