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.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry