Aspherical ball is immersed in water contained in a vertical cylinder. the rise in water level is measured in order to calculate the radius of the ball. calculate the radius of the ball in the following cases:
(a): cylinder of radius 10cm, water level rises 4cm.
(b): cylinder of radius 100cm, water level rises 8cm

Who was the first scientist to measure speed as distance over time?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)