A body of mass x gram suspended at the 15cm mark of a ruler balanced it at the 30cm mark on a pivot. If the ruler has a mass of 36g and its centre of gravity is 55cmmark, calculate the (i) mass x (ii) distance of the balanced point of the ruler from the zero end when the body is moved to the 25cm mark.​

Which branches of natural science include the study of an organism that lived 10 million years ago

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?