Microwave ovens use microwave radiation to heat food. theenergy of the microwave

Question

Microwave ovens use microwave radiation to heat food. theenergy of the microwaves is absorved by water molecules in food,then transferred to other components of the food.
(a) suppose that the microwave radiation has a wavelength of11.2cm. How many photons are required to heat 200mL of coffee from23oC to 60oC? (b) suppose the microwaves power is 900 W (1 watt = 1 J-s).How long would you have to heat the coffee in part (a)? Microwave ovens use microwave radiation to heat food. theenergy of the microwaves is absorved by water molecules in food,then transferred to other components of the food.
(a) suppose that the microwave radiation has a wavelength of11.2cm. How many photons are required to heat 200mL of coffee from23oC to 60oC? (b) suppose the microwaves power is 900 W (1 watt = 1 J-s).How long would you have to heat the coffee in part (a)?

Explanation / Answer

doesnt planks constant x speed of light / .112 m (which is the wavelength) = 1.77 x 10^-24th? how do they get 2. something x 10^-26

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