Calculate the electric field at distance of 320 cm from an infinitely long wire carrying a charge per unit length 8.3 cm

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?