Question

question 17 (1 point)
alpha radiation travels at the speed of light and has high penetration power in biological tissue
true
false
question 18 (1 point)
a nuclear reaction may not obey the laws of conservation of energy and mass even using e = mc²
true
false
question 19 (1 point)
the unit curie, ci, is not a dosage. (note that 1 ci = 3.7 x 10¹⁰ disintegrations/s)
true
false

Explanation:

• For Question 17: Alpha - radiation travels much slower than the speed of light and has low penetration power in biological tissue.
• For Question 18: Nuclear reactions obey the combined law of conservation of mass - energy using $E = mc^{2}$.
• For Question 19: The Curie (Ci) is a unit of radioactivity (number of disintegrations per second) and not a dosage unit.

Answer:

Question 17: B. False
Question 18: B. False
Question 19: A. True