Red paint mixed with blue paint becomes purple. What is the most likely cause of this color change? A.
a change in the state of matter
B.
the formation of a new substance
C.
a physical change
D.
a chemical reaction
plz help

How many joules of heat are absorbed to raise the temperature of 650 grams of water from 5.00c to it's boiling point, 100c

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Find the mass in grams of 1.37x1020 particles of h3po4