Which of the following gives the name for electromagnetic radiation that has wavelengths between 0.4 and 0.7 micrometres?
A. visible light
B. infrared light
C. microwaves
D. ultraviolet light
Answer: A
You might also like to view...
Because magnetic force on a moving electron is always perpendicular to its direction of motion, magnetic force cannot change an electron's
A. speed and direction. B. direction. C. speed. D. none of the above
NICs are best exemplified by
A) Bolivia, Burkina Faso, Ghana, Malawi, Samoa and Tanzania. B) Slovakia, Romania, Bulgaria, Latvia, Ukraine and Yugoslavia. C) Canada, Finland, Russia, South Africa, Australia and New Zealand. D) China, Brazil, South Korea, Mexico, Taiwan, India and Argentina. E) Amsterdam, New York, Tokyo, London, Moscow and Beijing.
An Alka-Seltzer antacid tablet bubbles vigorously when placed in water but only slowly when placed in an alcoholic beverage of the same temperature containing a 50:50 mix of alcohol and water
Propose a probable explanation involving the relationship between the speed of a reaction and molecular collisions. A) The alcohol absorbs the carbon dioxide bubbles before they escape the liquid phase. B) Alcohol molecules are more massive than water molecules, hence they move slower and their collisions are not as forceful. C) The tablet reacts with water but not the alcohol. D) In a 50 : 50 mix there are fewer water molecules for the antacid molecules to collide with.
At sea level, how far can a molecule in the atmosphere travel before it collides with another molecule?
A) 5 × 10-4 cm B) 2 cm C) .004 cm D) 7 × 10-6 cm