A.) Calculate the energy in joules of a photon of radiation whose wavelength is 419 nm . Express your answer with the appropriate units.

B.) What wavelength (in meters) of radiation has photons of energy 6.20×10−19 J ?
Express your answer with the appropriate units.

Which characteristics can be used to differentiate star systems? check all that apply.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe