Answer:
francium
Explanation:
The most expensive natural element is francium, but it decays so quickly it can't be collected to be sold.
Answer: because as CO2 acts as a green house gas is absorbing rather than reflecting the heat energy received where infrared radiation is simply radiation emited by heated /hot body
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
Answer:
334.48
Explanation:
delta T = 4 degrees
m = 20 grams of water
c = 4.181 J / gram
E = 20 * 4.181 * 4
E = 334.48 Joules
Remember to change c to Joules / gram
4181 j / kg * 1 kg / 1000 grams = 4.181 j / gram
