How long a boy will take to run round a square field of side ,35 if he run at the rate of 9km/hr

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

How many times did thomas edison mess up the light bulb

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.