A sun-like star is barely visible to naked-eye observers on earth when it is a distance of 7.0 light years, or 6.6 * 1016 m, away. The sun emits a power of 3.8 * 1026 W. Using this information, at what distance would a candle that emits a power of 0.20 W just be visible?

At a distance of 1376.49 candle emits 0.2 watt power

Explanation:

Distance between Sun and earth

Sun emits a power of

Power emitted by candle = 0.20 watt

We know that brightness is given by

So

So at a distance of 1376.49 candle emits 0.2 watt power

truck y has a greater velocity than truck x.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods