What is solute concentration?

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

There is only one copy machine at your office. you have to make 1000 copies of an expense report. after you begin copying, two other employees show up in the copy room. each has to make only 10 copies each. what is the proper etiquette in this situation?

Matching: 1. first used by europeans as a local anesthetic; now abused for its euphoric effects 5 marijuana 2. found in coffee beans, tea leaves, and cocoa beans 2 heroin 3. prescribed for pain involving serious injury or surgery 1 morphine 4. illegal derivative of morphine that is sold on the street as a white powder 6 caffeine 5. can evoke feelings of terror and panic 4 lsd 6. causes user to experience a conscious dreamlike state 3 cocaine