Kara built a model of how molecules behave when they are in solid form. she filled a clear plastic box with marbles to the very top and put the lid on the box. when she shakes the box, the marbles can barely move. which of the following is a limitation of kara's model?

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.