The oxidation number of calcium in the compound CaCl2 has to be... A. -1 O
B.-2 O
C. +2 O
D. +1

(Edit)
Correct Answer C

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?