Greenhouse gases let through a lot (but not totally all) visible light, while infrared light gets trapped in, or reflected from, the medium. That means that although visible light is able to pass through to us on the surface, the long wavelength infrared light, which is produced as a result of this visible light heating up everything on Earth, gets trapped on its way out of the earth's atmosphere, heating up the planet.
A good analogy is the effect that a sunny day has on the inside of your car when you enter it. The light comes in, the heat stays in. The glass windows of the car display similar, although more intense, properties to greenhouse gases. Hence the name "GreenHouse Effect"
Answer: <span>C.) They reflect infrared light but let visible light pass through.
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The speed should be 48 mph, because 7200 divided by 150 is 48
Answer:
D. MgO
Explanation:
We need to look at the charge of element. (Look at a periodic table for this)
Mg, which is Magnesium, has a charge of 2+ because it's in the second column, or group, from the left.
O, which is Oxygen, has a charge of 2- because it's in the second column, or group, from the right.
Since Mg is 2+, it's the cation and since O is 2-, it's the anion. We can put these two elements together into an ionic compound.
Mg^(2+) and O^(2-) becomes Mg2O2, where we can cancel the 2s: MgO.
Thus, the answer is D.
Hope this helps!
2 in front of H2. Technically nothing in front of O2 otherwise put a 1 then a 2 in front of H2O
2H20 + 1O2 —— > 2H2O
Answer: Yttruim: 39 protons, 50 neutrons, 39 electrons
Ruthenium: 44 protons, 57 neutrons, 44 electrons
