Which of the following is not a motivation behind taking performance enhancing drugs A. improving recovery times from injuries
B. pumping blood with extra oxygen
C. having bigger, stronger muscles
D. losing weight due to decreased appetite

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?