Friction is also a force that, when unbalanced, can change the velocity of an object. What You Will Learn â¢ The magnitude of the force of friction can vary. â¢ Kinetic friction is a force that, when unbalanced, can change the velocity of a moving object. â¢ Static friction balances an applied force and can prevent motion.
It belongs to the group of compounds. known as methylxanthines which include. theobromine (cocoa) and theophylline (tea). Because of its excellent solubility and slow rate. of degradation, caffeine can persist in aquatic. environments (Seiler et al., 2005) and has the. potential to biomagnify through the food chain. Thus, even a small amount of dissolved caffeine. in aquatic environment can concentrate over. time.
Caffeine is a mild diuretic, speeding up the urination cycle, but steals calcium which is lost through urine. Long term, heavy caffeine use leads to a rapid development of osteoporosis. 6. The effect of coffee on the cardiovascular health is controversial: some say it's good, others that it is a risk factor. Caffeine blocking adenosine constricts the brain's blood vessels.