What are the signs of δs univ, δs surr, and δs sys, respectively, for water freezing at -10°c? a) δs univ is positive, δs surr is negative, and δs sys is positive. b) δs univ is negative, δs surr is negative, and δs sys is positive. c) δs univ is positive, δs surr is positive, and δs sys is negative. d) all three values are positive.

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.