If the temperature (at constant volume) of an ideal gas with 20 K is increased to 60 K, the pressure will be: increased to 3P

increased to 40P

decreased by 3P

decreased by 40P

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.