The speed of sound in air is 331 m/s. what is the plane's speed in terms of the speed of sound?

What is the temperature in degrees celsius of a substance with a tempature of 49k

Ways that industry and agriculture use physical properties to separate substances

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.