A box is lifted vertically 1.5 m and is then held there. The box has a weight of 100 N. Ignore friction. How much work is being done lifting the box? 150 J

50 J

100 J

0 J

Can you think of a way a rock unit with an older fossil could be above a rock until with a younger fossil? describe the scenario.

Which example has gravitational potential energy? a. a horse slowing down from a run b. an apple about to fall from a tree branch c. a bicycle being pedaled down a horizontal path d. beaker sitting on the floor

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?