To find the total energy emitted in the proton-proton chain, you have to consider the fact that two He-3 atoms must be created to form the final He-4 atom. Write the energy produced in each step, and then find the sum of all of these energies using the table below.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth