The intensity of an image of an object formed by a convex lens is i.
the intensity of this image can be made i÷4 by
(1) decreasing the size of the object.
(2) decreasing the sidtance of the object from the lens.
(3) covering one half of the lens with a black paper.
(4) covering three fourth of the lens with a black paper.

Asher cycles 12 miles in 16 hours. what is his speed?

Which of the following is an example of motion in two dimensions?

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.