Friday

August 22, 2014

August 22, 2014

Posted by **Mai** on Sunday, February 15, 2009 at 2:01am.

On a Sunday morning while having your breakfast you determine that you need about 2.95X10^(5)J to heat water for your tea in the microwave. If 2.5X10^(24) photons hit the cup every second and you set the timer to 2.4 min, what should the frequency of the microwave be so that the tea is ready in that time?

- College: Chemistry -
**GK**, Sunday, February 15, 2009 at 8:49pm•Convert the minutes to seconds.

•Multiply (photons/sec) by number of seconds to get the total number of photons.

•Divide total joules by numer of photons to get the energy of a photon.

• E(photon) = h*f (f = freq.)

Substitute E and h into the above formula and solve for f.

**Related Questions**

chemistry - This question I really don't get it. I tried tried tried to figure ...

college: Chemistry - I need help on this homework problem and I do not ...

5th grade math - I need help with this problem ! 5 2/5 - 3 4/5= ? 6 1/10 - 3 4/...

Chemistry - What volume would be occupied at 0°C and 1 atm by 3 mol CO₂(g...

Chemistry - I still don't understand how to do this problem; grams/molar mass I ...

algebra 1 - How do you simplify this problem? I really need help.I need it step ...

Chemistry - My teacher gave us the answer to a chemistry problem and i cannot ...

math - i need to know how to work this problem out step by step..[-16*-11/(4-9...

Chemistry - Hi! I need help with the step by step procedure for chemical ...

Chemistry - Find the pH: 1) A 0.001M solution of HCl 2) A 7.98 x 10^-2 M ...