According to the Hertzsprung-Russell diagram, a star with a very high luminosity and a temperature of around 9000 K is most likely which type of star? A. Main Sequence Star
B. Giant
C. Supergiant
D. White Dwarf ​

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Which describes increasing the efficiency of energy resource

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3