Question

A lethal dose of radiation isQuestion 7 options:A) 500 mremsB) 300 mremsC) 20 remsD) 500 rems

Answer 1

A lethal dose of radiation, which has a 50% chance of causing death within 30 days, is 500 rems, making 'D) 500 rems' the correct answer to the question.

Step-by-step explanation:

The question you're asking relates to radiation exposure and the threshold for what can be considered a lethal dose. From the information provided, it's clear that a dose of 500 rems has a significant chance of being fatal, as it is estimated to cause death in 50% of exposed individuals within 30 days. Radiation exposure of 600 rem and higher are typically fatal, while lower doses like 20 rems or 100 mrems per year have more difficult-to-assess long-term effects, such as an increased cancer risk, despite being well beneath the threshold for acute fatality. Therefore, the answer to the question of 'A lethal dose of radiation is' corresponds to option D) 500 rems. It's crucial to note the cumulative effect of radiation and to avoid unnecessary exposure to limit long-term health risks.

Answer 2

Radiation is energy emitted by some types of atoms. We measure them with different types of units such as rem, sievert. We need about 400 to 450 rem to kill 50% of the population exposed.