Context: When two surfaces are in contact, friction is always present. Definition: To pull along with difficulty or effort. Context: An airplane comes to a stop because of the drag or pull on it as it moves through air and across a surface. Definition: Strength or energy exerted. Context: A force can change the direction of motion, increase the rate of motion, slow down motion, or stop it all together. Definition: The rubbing of one object or surface against another; the force that resists motion between bodies in contact. Context: Bicycle brakes use friction to stop the wheels from turning.
Caffeine CAN halt hair loss, says German scientist. By Marika Sboros. You know the kick caffeine in a cup of coffee gives to your body and mind first thing in the morning. Now, German scientist Dr Adolph Klenk says that same caffeine can prevent hereditary and hormonal hair loss in men and women. Klenk was in South Africa recently to present his pioneering research on caffeine and hair loss to delegates attending the second international conference of the Dr Wolff Group in Cape Town.
Weight loss. Taking caffeine in combination with ephedrine seems to help reduce weight, short-term. Taking 192 mg of caffeine in combination with 90 mg of ephedra daily for 6 months seems to cause a modest weight reduction (5.3 kg or 11.66 pounds) in overweight people.