A object 0.25mm long is viewed through a converging lens.calculate the distance of the object from the lens,size of the image,power of the lens
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 18.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. The station in 215 m long.
(a) How long is the nose of the train in the station?
s
(b) How fast is it going when the nose leaves the station?
m/s
(c) If the train is 130 m long, at what time t does the end of the train leave the station?
s
(d) What is the velocity of the end of the train as it leaves?
m/s
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