Which of the following is a sign of puberty? A.
intense changes in hormone balance
B.
increased height and strength
C.
development of sexual characteristics
D.
all of the above

Please select the best answer from the choices provided.

A
B
C
D

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

Describe the path of the electric current through a circuit?

According to the tide table below what time of day will the highest tide occur?