A2.99-m-long2.99-m-long rod, as measured in its rest frame, speeds by you longitudinally at 6.49×107 m/s6.49×107 m/s . you measure its length as it passes. by how many millimeters do you determine the rod has contracted?

The contraction in the rod is 71 mm.

Explanation:

Given that,

original length L'= 2.99 m

Speed

We need to calculate the length

Using expression for length contraction

Where,

Where, v = speed of observer

c = speed of the light

Put the value into the formula

The expression for the contraction in the rod

Hence, The contraction in the rod is 71 mm.

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

this could be newton#'s law of cooling. the cooling curve is exponential