In a nuclear reactor , 0.20 kilogram of uranium -235 and 0.50 kilogram of plutonium -239 are completely converted to energy . How many joules of energy are produced ?

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

What causes the formation of ocean currents?