What portion of the compound copper carbonate CuCO3 is a covalently bonded polyatomic ion? A. CO3
B. O
C. C
D. Cu

It's A

What is the mass of the same rock on the earth

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?