What is the resistivity of a wire of 1.3 mm diameter, 2.3 m length, and 61 ms resistance. number units the number of significant digits is set to 2; the tolerance is +/-2%

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