When you apply an alcohol swab to your skin, it feels cool because
A. the density of alcohol is less than 1 g per cm3.
B. your skin transfers a bit of heat to the liquid alcohol and the alcohol evaporates.
C. germs are destroyed by the alcohol, and they give off cold heat as they die.
D. of nothing-it is an illusion, because evaporating alcohol is actually hotter than liquid alcohol.
Answer: B
You might also like to view...
Which type of signal could carry the largest amount of information?
A) low intensity B) high intensity C) large bandwidth D) small bandwidth
Suppose you climb the stairs of an eight-story building, about 24 m high, and your mass is 70 kg. The gravitational potential energy you gain is about
A. 40 calories. B. 16,500 calories. C. 40 Joule. D. 16,500 Joule.
The main difference between a radio wave and a sound wave is
A) frequency. B) wavelength. C) energy. D) amplitude. E) basic nature.
Two horizontal curves on a bobsled run are banked at the same angle, but one has twice the radius of the other. The safe speed (for which no friction is needed to stay on the run) for the smaller radius curve is v
What is the safe speed on the larger-radius curve? A) v / B) 2v C) v D) v/2