Question

Projectile of mass 50g is projected with a velocity of 10ms from the ground at an angle of 45 with the horizontal find the magnitude of the change in its momentum between leaving and arriving back to the ground

Answer 1

The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution. The letters pH stand for "power of hydrogen" and numerical value for pH is just the negative of the power of 10 of the molar concentration of H+ ions.