An electric field is given by E = xy-a, -xz²a, + xyzd,.
Calculate the x component of its curl at (2, 1, 3)​

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g