Some materials in seawater are economic to extract at the present
What will be an ideal response?
This is true, especially of magnesium and, to a lesser extent, chlorine.
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What types of mirrors always produce upright images?
A. Converging and plane B. Diverging and plane C. Converging and diverging D. The image from all types of mirrors is always upright.
When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard, the speed of the skateboard
A) decreases. B) increases. C) neither decreases nor increases.
A heater is rated at 1200 watts for a 120-volt source.If two heaters are connected in parallel across the 120-volt source, the current drawn from the source is 10 amperes
a. True b. False Indicate whether the statement is true or false
These two diagrams contrast the habitable zones around the Sun and around a much lower mass star. They are shown to scale. Based on what you see here, what can you conclude about the possibility of finding life around the lower-mass star compared to finding life around a Sun-like star?
A) There is a higher probability that an orbiting planet will be in the habitable zone for a Sun-like star than for a lower-mass star. B) Sun-like stars must always have more life around them than lower-mass stars. C) A Sun-like star always has at least two habitable planets, while a lower-mass star may have only one habitable planet. D) There is virtually no chance of finding life around a lower-mass star.