Amicrowave oven has a power rating of 850 w. if the microwave is turned on for 6 minuites how much energy will it use? ?

Before we jump into it, I just want to point out that a microwave oven has two
power ratings.  One is the amount of electrical power it takes from the wall outlet to do its job. The other is the "cooking power" it delivers into the chamber in the form of microwave radiation to heat the meatloaf.  The utility power required from the wall outlet is always more than the cooking power radiated into the chamber.

But we didn't really need to go into all that in order to answer the question.

1 watt = 1 joule per second
1 minute = 60 seconds

(850 watts) x (1 (joule/sec) / watt) x (60sec/min) x (6 minutes) = 306,000 joules 

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.