We've discovered many exoplanets that are many light years away. Why don't these planets orbit the Sun?

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.