a hydraulic lift is to be used to lift a 1500-kg weight by putting a weight of 25 kg on a piston with a diameter of 10 cm. determine the diameter of the piston on which the weight is to be placed.

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Which of the following list the divisions of the geologic time scale in order from longest to shortest

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?