Need help for physics thanks

Which statement best explains why an object weight less on mercury than it does on earth

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.