Calculate the mass of a proton (in kg) using the charge-to-mass ratio given below and its known charge. (the charge of a proton is 1.602 ✕ 10−19 c and the charge-to-mass ratio of a proton is 9.579 ✕ 107 c/kg. round your answer to at least four significant figures.)

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter