(1 Point) To construct an angle of 22.5 we must

bisect a 60° angle
bisect a 45degree angle
bisect 30° angle
none of the above​

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule