Question

0. The speed of a train is 40 Km/h. If crosses a pole in 18 sec. Length of train
be.............
(a) 190m (b) 160 m (c) 180 m (d) 200m​

Answer 1

Step-by-step explanation:

That time is a dimension of spacetime (sometimes called the fourth dimension) is another valid definition.

For example, consider the Minkowkski metric

ds²= -c²dt² + dx² + dy² + dz².

Then that temporal dimensions, and the usual coordinate time t in particular, are different form spatial dimensions like x,y, and z, is indicated by the fact that the coefficient of the temporal summand is negative, while it is positive for like spatial summands

Answer 2

Step-by-step explanation:

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