If the mass of the Crown is 505431 mg, and volume is 44 mL, what is the density of the Crown? Was the Crown solid gold? (the density of gold is 19.3 g per cubic centimetre.)

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

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m