Q1. The pH of the inner thylakoid space has been measured, as have the pH of the stroma and of the cytosol of a particular plant cell. Which, if any, relationship would you expect to find?

Q2. A student tests the second law of motion by acceleration a block of ice at a rate of 3.5 m/s2. If the ice has a mass of 12.5 kg, what force has to the student applied to the ice?

Q3. The atomic mass of a sample of oxygen, which has O-16, O-17, and O-15 isotopes, is given on periodic table as 15.9995. How was this number determined?