If for a particular component its rf value in hexane is 0.25, how would this value be affected if instead of hexane a mixture of 25% hexane and 75% ethyl acetate was used as eluent?

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

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above

Wind and moving water provide energy. chemical mechanical thermal none of the above