What is the equation for the current I1 through the resistor R1 in terms of the potential difference ΔV across this resistor? I1 = R1/ΔV I1 = ΔV/R1 I1 = ΔV · R1

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