The sun could have a small degree of influence on global warming, but it is not the main cause of the rapid rise in Earth's temperature. What evidence from the text supports this conclusion?
A: The sun's brightness varies slightly and regularly over time. The main cause of that dimmer-switch effect is sunspot activity. B: Since 1979, the sun's output has decreased while the Earth has warmed more rapidly than in any 30-year period for centuries. C: Clouds have a cooling effect on climate because they reflect the sun's energy. So fewer clouds could indeed lead to warming. D: Ionized molecules have electric charges. Ionized molecules might attact water molecules, causing clouds to form.

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2