19. 160 g of molten silver at its melting point, 960°C, is allowed to solidify at the same temperature and gives out 16 800 J of heat. (a) Calculate the specific latent heat of silver?

And

If the mean specific heat is 230j/k. How much additional heat does it give out in cooling to -40C?

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.