A student has a convex lens with a focal length of 12 cm. How close should she put an object to the lens if she wants the image to be inverted and magnified by a factor of 3?
A. 4 cm
B. 15 cm
C. 16 cm
D. 36 cm

Two trains leave a station at the same time, train a travels at a constant speed of 16 m/s. train b starts at 8.0 m/s but accelerates constantly at 1.0 m/s squared. after 10.0 seconds, which train has the greater speed?

An atom that has gained or lost electrons is called an _

The release of energy by the nucleus of atom as a result of nuclear fission is radiant energy true false