The pictures shows what a student observed when he looked through a hand lens at a penny.
what happens to light passing through a hand lens that makes the image of the penny appear larger?
the light is-
a. refracted
b. stopped
c . absorbed
d . reflected

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is