The pressure at the top of a liquid is zero. At a depth of 0.589 m, the
fluid pressure is 4910 Pa. What is
the density of the fluid?

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?