0.21kg pine cone falls 14 m to the ground, where it lands with a speed of 13 m / s. (a) with what speed would the pine cone have landed if there had been no air resistance? (b) did air resistance do positive work, negative work, or zero work on the pine cone? explain

answer:

ok so not do not trust me on this but here is my answer

(a) if the pine cone would hvve landed with no resistance then it would maintain a uniform speed which in the question is 13 m/s

(b) air resistance generally does negative work but in this case it did zero work

here are some information of the future of geothermal energy:

-the future of geothermal energy can pretty much be summed up with a single word: more

-scientists plan in going deeper than 120 meters

-we are hoping that one day, we will get all of our energy from renewable energy sources such as geothermal energy

hope this !

heats surface water up