61. A stone is projected horizontally from the top of a tower with a
speed of 10ms-1, it lands at a
horizontal distance of 20m from the
foot of the tower. Calculate the
height of the tower. (g=10ms-2)​

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?