Answer:
the angle is given by
Tan theta = 35/59 = 0.59
so theta = Tan ^-1 ( 0.59 )
theta = 30.54 deg.
The 2 means there are two phosphate ions in a molecule of magnesium phosphate.
As we know that P=IV so P = (0.5A)(4.5V)
P= 2.25 watt
"Waves can exist in solids, liquids, and gases."
is the ONLY accurate statement.
The word "only" in the other 3 statements makes them
not accurate at all.