1/f= 1/di+1/do
1/f=1/90m+1/40m
1/f ≈27.7m
Answer:
It says energy can't be created or destroyed
Explanation:
Answer:
All the elements of a period have similar chemical properties because they have the same number of valence electrons in their outermost shell. Their atoms have the same number of electrons in the highest occupied energy level
It increases. Mercury takes 88 days to orbit the sun once. The Earth takes a year. Pluto takes 248 years.
Answer:
What is it called when the right side of a design is reflected across a central axis and mirrored on the left side of the design?
