Acommon way to measure the distance to lightning is to start counting

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction