Answer:
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From the freezing temperature up to about 4°C (39°F) the water CONTRACTS. That is, it becomes MORE dense. I think I read that water is the ONLY known substance whose solid phase floats in its liquid phase. That's why the cubes float in your soda and bergs float in the ocean. And if weren't so, then life on Earth would not be possible ! Oceans and lakes would freeze from the bottom up, ONE TIME, and then never thaw again.
Answer:
The focal length of the given spherical mirror is 20cm.
Explanation:
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One Celsius degree is the same size as one Kelvin. Each of them is the size of 1.8 Fahrenheit degrees.
