1. A student using a stopwatch finds that the time for
10 complete orbits of a ball on the end of a string
is 25 seconds. The period of the orbiting ball is
A 25 sec
B 2.0 sec
C. 2.5 sec
D. 5.0 sec

What happens to the light rays when they hit the specimen?

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

Quantum mechanics applies to subatomic, atomic, nanometer-size, and micrometer-size systems. nanometer, micrometer, and kilometer-size systems. atomic, nanometer-size, and micrometer-size systems. subatomic, atomic, and nanometer-size systems.