A beam of protons and a beam of neutrons of the same energy are both harmful to living tissue. The beam of neutrons, however, is less harmful. Why?
A. Neutrons carry no electric charge and thus have a greater likelihood of passing through the tissue.
B. Neutrons are much smaller and lighter than protons and would do less damage.
C. Neutrons travel at reduced speed compared to the speed at which protons travel.
D. All of the above are reasons why neutrons are less harmful.
Answer: A
You might also like to view...
Major companies have increased profits by developing or using cleaner and more efficient energy technologies.
Answer the following statement true (T) or false (F)
A 100-m wide river flows due south. A boat that travels 1 m/s relative to the water is pointed due east as it crosses from the west bank. The time for the boat cross is
A. 141 s. B. 200 s. C. 100 s. D. 50 s.
Warming temperatures have accelerated the thawing of Gelisols. This is of particular concern because
A) Gelisols contain about half of the pool of global carbon and this release of carbon dioxide and methane into the atmosphere could further affect warming climate. B) as the permafrost metals, the meltwater will runoff, further contributing to global sea-level rise. C) Gelisols are an important soils for growing specialty cold weather crops. The thawing of the Gelisols will adversely impact this lucrative market. D) Gelisols are the youngest, least developed soils on the planet. Warming will further stifle the horizontal development of these soils.
In the context of the three-cell model of the general circulation, the Ferrel cell is:
a. A circulation of rising air near the equator and sinking air in the sub- tropics. b. A circulation of rising air in subpolar latitudes and sinking air in the sub- tropics. c. A circulation of rising air in subpolar latitudes and sinking air in the polar regions. d. A circulation consisting of rising air in the western equatorial Pacific Ocean and sinking air in the eastern equatorial Pacific Ocean.