Based on the above diagram, which type of stars belong to spectral class K & have lowest luminosity?

Evaluate this exponential expression,8. (2 + 3)2 – 42

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Do polar molecules have ionic bonds?