A pendulum is made by letting a 4 kg mass swing at the end of a string that has a length of 1.5 meter. The maximum angle that th
e string makes with the vertical is 30 degrees (in both directions). What is the change in the potential energy of the mass as it moves from the lowest point to the highest point of its path?
The answer is D. Solutions you cannot see the separate substances. however in a mixture you can see the different substances. So the correct choice is D