If the train has a mass of 188 000 kg and the coefficient of friction on dry steel is 0.41 (static) and 0.38 (kinetic), what is the amount of static and kinetic friction force available to the wheels?

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.