Which of the following are likely to form a covalent bond? aluminum and oxygen sulfur and oxygen magnesium and chlorine copper and copper

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Hydrogen and helium are both members of?

What occurs during a combustion reaction