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Microwave ovens emit microwave radiation that is absorbed by water as heat. Suppose that the wavelength of the radiation that is 12.5 cm in an oven that has a power rating of 900 watts. (1W = 1 J/s) a) How many moles of photons are released per minute b)...

A typical laser pointer is rated at 5.0 mW. It outputs red light with a wavelength of about 6300 Angstrom. How many photons of laser light will be emitted from the pointer if it is used 120 seconds.

To eject electrons from the surface of potassium metal, 222kJ/mol of electrons are needed. a) What minimum frequency of light is needed to supply the required energy? b) What is the wavelength of this light? c) If potassium is irradiated with light having...

The height of an isosceles triangle is 4r. The radius of an inscribed circle is r. What is the area of the triangle?

The sides AB and AC of triangle ABC have lengths of 4 inches and 7 inches, respectively. The median AM is 3.5 inches. What is the EXACT length of BC. Show your work.

Go to: //mmpc.svsu.edu/54thMMPC-PI-Test.pdf Can you explain why number 12 is D?

a triangle has vertices A, B, and C, and the respective opposite sides have lengths a,b, and c. If a=1, b=3, and C=60, then sin^2(B) is equal to ?

99 - 98.2 = .8 .8 divided by .6 = 1.29...z-score z-score of 1.29...on table =.9015 = 90.15 %

sum=(7.4)5=37. 37-11-12-5-3=x=6.

q=mct c is the specific heat in j per gram times degree celsius 150g*(4.18)(10)=6270 J

Heat loss rate= q/t= (0.97(2)(28-22))/ thickness of skin.

I figured out the answer to my own question. 9(0.75)/c^2=6.75/c^2=(sin^2)B. Using law of cosines, c^2=7. 6.75/7=27/28.