6the planet koi-314c was discovered in 2013. it has a similar mass to earth and is
200 light-years away. if we can see the light reflected from this planet today, does this
mean that the planet still exists? explain your answer.

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)