How long does it take to exert 1500 J of work if power output is 350 W?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?