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 are much smaller and lighter than protons and would do less damage.
B) Neutrons travel at reduced speed compared to the speed at which protons travel.
C) Neutrons carry no electric charge and thus have a greater likelihood of passing through the tissue.
D) All of the above are reasons why neutrons are less harmful.
C
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Which of the following is true regarding Arab Americans’ collective worldview?
a. Arab Americans see themselves as part of an extended family and community structure b. Help is sought from other members of the group c. Interdependence is valued as a sign of dedication d. All of the above are true.
Which zone is the deepest seabed zone?
A) Bathyal zone B) Hadal zone C) Littoral zone D) Abyssal zone
A by-product of photosynthesis is
A) nitrogen. B) argon. C) oxygen. D) xenon.
Your friend says that the helium used to inflate balloons is a product of radioactive decay. Another friend says "no way." With whom do you agree?
A. Helium is an element of the periodic table, not some product of any reaction. Agree with the friend who says "no way." B. Your first friend is correct. Radioactive isotopes emit alpha particles which, in turn, capture electrons and become helium atoms. C. If helium were a product of radioactive decay, we would all be radioactive. Agree with the friend who says "no way." D. Radioactive decay produces alpha particles, not helium. Agree with the friend who says "no way."