A1.80-m-tall person stands 3.50 m from a convex mirror and notices that he looks precisely half as tall as he does in a plane mirror placed at the same distance.

what is the radius of curvature of the convex mirror? (assume that sinθ≈θ.) [hint: the viewing angle is half.]

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

The energy equivalent of the rest mass of an electron is

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance