What is the average 40 yd dash time for an 11 yr old and what time should my 40 yd dash be at 13 years old.

This is the new face book like like like like like like

Which incomplete plant-based protein can be combined with legumes to achieve balance nutrition

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 dependent variable in galileo's experiment?