How is the nuclear fusion that takes place in the sun different from a chemical reaction? a. it happens at a lower temperature. b. more energy is released for a given mass of fuel. c. more hydrogen is formed. d. the energy input is greater than the energy output.

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.