If the crate shown here is moving at a constant speed in a straight line, and the force applied is 310 n, what is the magnitude of the force of friction?.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Which type of basaltic lava flow has a fairly smooth

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.