A high-speed train accelerates at a constant rate in a straight line. The speed of the train increases from 30 m/s to 42 m/s in 60 seconds.
a) Calculate the change in speed of the train

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger

Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.

When solid surfaces slide over each other the kind of friction that occurs is called friction