Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
PHY1020-Chapter 4
PHY1020 Test 1
| Question | Answer |
|---|---|
| Energy in the Sun is produced primarily by ______. | Fusion. |
| The mass of the nucleus is closest to ______. | 99% of that in the entire atom. |
| Radioactivity in the Earth leads to: | Helium for toy balloons. |
| LD50 refers to a: | Lethal Dose |
| A major reason that your body is radioactive is that: | You eat radioactive carbon in your food. |
| The primary cause of death from the Hiroshima bomb was: | The blast from the bomb. |
| Fission fragments are: | Among the most dangerous kind of radiation. |
| If the half-life of an element is big, that means that: | It decays slower than one with a smaller half-life. |
| After 3 half-lives, the fraction of nuclei remaining is: | 1/8 |
| Most of the elements found on the Earth were created: | within a star |
| The fraction of the US population that dies from cancer is usually: | 1 out of 5 |
| Watch dials containing radium glow because: | The radiation hits a phosphor. |
| One rem of radiation dose takes how many gammas per square centimeter? | About 2 billion. |
| Which requires the larger dose: radiation poisoning or cancer? | Cancer |
| The linear is hypothesis is: | Widely used even though it is not proven. |
| 1 Sievert= ___ rem | 100 |
| Cancer is lower in Denver because: | No one knows why. |
| The number of deaths from the Chernobyl accident is about | 24,000 |
| Radioactivity it used in: | Smoke detectors |
| Neutron activation is used to: | Search for rare atoms |
| Dirty bombs may be less of a threat than people fear, because | Once spread out, the rem drops below the radiation illness threshold. |
| Radioactivity in the Earth is responsible for: | Helium we use in toy balloons |
| Volcanic heat comes from: | Radioactive explosions |
| The best way to measure the age of an ancient bone is by using: | Radiocarbon dating |
| An RTG (radioisotope thermoelectric generator) is: | Carried in satellites for power |
| Uranium is found on the Earth, even though it is radioactive. That's because: | It has a very long half-life. |
| Carbon-14, compared to Carbon-12: | Has more neutrons. |
| Alexander Litvinenko was assassinated with: | Polonium |
| The radiation from cell phones does/does not cause cancer. | Does not. :) |
| The threshold for radiation illness is about ______ rem. | 100 |
| The natural radioactivity (Rate of nuclear decays) in a typical human body is closest to: | 4000 per second |
| The source of energy in the Sun is: | Fusion of hydrogen |
| Which of the following is most toxic per gram: Arsenic, Botox, or Plutonium? | Botox |
| The radioactivity from your own body: | Does cause cancer, but at a very low rate. |
| Drinking alcohol is required to be radioactive because: | it proves that it is not made of petroleum. |
Created by:
SilhouetteXD
Popular Physics sets