The warm up period of a work out is important because it?
(a).guarantees an injury free workout.
(b).slowly and safely raises heart rate.
(b). a person to exercise for a longer period of time.
(d) ensures the effectiveness of the workout.

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Why would a smoker tend to inhale more deeply and smoke more cigarettes when he or she switches to low nicotine cigarettes

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