Two students in a physics laboratory each have a concave mirror with the same radius of curvature, 55 cm. each student places an object in front of a mirror. the image in both mirrors is two times the size of the object. however, when the students compare notes, they find that the object distances are not the same. what is the distance of the closer object?

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.

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

Arrange the images in order to show how lake-effect snow occurs.