An electric train move from rest with a uniform acceleration of 1.5 m per second square for the first 10 seconds and then continue accelerating at 0.5 m per second square for a further 20 seconds continue at a constant speed and finally take 30 seconds to decelerate uniformly . (a) draw a graph of Speed against time for the drawing
(b) from your graph or otherwise did use the total distance traveled
(c) what is the average speed of the train for the whole average ​

What are some properties of transverse waves?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*