The atoms and molecules in gases<span> are much more spread out than in solids or</span>liquids<span>. They vibrate and move freely at high speeds. A </span>gas<span> will fill any container, but if the container is not sealed, the </span>gas<span> will escape. </span>Gas<span> can be compressed much more easily than a </span>liquid<span> or solid</span>
Answer:
Considering the half-life of 10,000 years, after 20,000 years we will have a fourth of the remaining amount.
Explanation:
The half-time is the time a radioisotope takes to decay and lose half of its mass. Therefore, we can make the following scheme to know the amount remaining after a period of time:
Time_________________ Amount
t=0_____________________x
t=10,000 years____________x/2
t=20,000 years___________x/4
During the first 10,000 years the radioisotope lost half of its mass. After 10,000 years more (which means 2 half-lives), the remaining amount also lost half of its mass. Therefore, after 20,000 years, the we will have a fourth of the initial amount.
Answer:
RADIATION <em>is</em><em> </em><em>the</em><em> </em><em>transfer</em><em> </em><em>of</em><em> </em><em>Heat</em><em> </em><em>energy</em><em> </em><em>through</em><em> </em><em>space</em><em> </em><em>by</em><em> </em><em>Electromagnetic</em><em> </em><em>Radiation</em><em>.</em><em> </em><em>Most</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>electromagnetic</em><em> </em><em>radiation</em><em> </em><em>that</em><em> </em><em>comes</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>earth</em><em> </em><em>from</em><em> </em><em>the</em><em> </em><em>Sun</em><em> </em><em>is</em><em> </em><em>invisible</em><em>.</em>
Answer:
b. glass and charcoal
Explanation:
Step 1: Given data
- Density of Glass: 2.6 g/mL
- Density of charcoal: 0.57 g/mL
- Density of platinum: 21.4 g/mL
Step 2: Determine which material will float in molten lead
Density is an intrinsic property of matter. Less dense materials float in more dense materials. The materials whose density is lower than that of lead and will therefore float on it are glass and charcoal.
