The following statements are true about hypotheses and theories except: testing a hypothesis may lead to the development of a theory. new theories and hypotheses may be the result of thinking about old problems in new ways. both theories and hypotheses have undergone testing. a theory is based on observations, while a hypothesis is not yet tested.

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

What is the role of the ocular lens?

How would a small bar magnet be oriented when placed at position x?