jide85
asked on
Some physics calculations.
Hello experts.
I need to impress a girl by helping her cousin out with some physics calculation
(never in my life I though I would write that sentence =),
though it was a looong time ago I tried to solve anything like this.
Maybe you guys can help me out, should be a piece of cake. ;)
Questions:
---------------
1. A microwave oven discharges microwaves with a frequency of 2.45 GHz.
a) Determine the wavelength of the microwaves.
b) Determine the energy of the microwaves.
c) At a certain point of time, 3 x 10^26 photons / sec are produced.
What is the effect of the microwave?
2. A violin cord is 32.5 cm long. The E-cord has a frequency of 660Hz, how much shorter do you have to cut it so it gives an A-tone (880Hz)?
I know these questions are elementary but my mind has hidden my knowledge very deep it seems...
Thanks for the help guys!
Best regards
//Jide
I need to impress a girl by helping her cousin out with some physics calculation
(never in my life I though I would write that sentence =),
though it was a looong time ago I tried to solve anything like this.
Maybe you guys can help me out, should be a piece of cake. ;)
Questions:
---------------
1. A microwave oven discharges microwaves with a frequency of 2.45 GHz.
a) Determine the wavelength of the microwaves.
b) Determine the energy of the microwaves.
c) At a certain point of time, 3 x 10^26 photons / sec are produced.
What is the effect of the microwave?
2. A violin cord is 32.5 cm long. The E-cord has a frequency of 660Hz, how much shorter do you have to cut it so it gives an A-tone (880Hz)?
I know these questions are elementary but my mind has hidden my knowledge very deep it seems...
Thanks for the help guys!
Best regards
//Jide
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Not sure about 2, but I think you can apply the same formula - speed of sound = length * frequency
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Thanks a lot guys.
Specially to byundt who beautifully explained some history around it as well.
You guys rule!
Specially to byundt who beautifully explained some history around it as well.
You guys rule!
ASKER
That is so true WaterStreet!
Sorry about the assignment question, I wont do it again. =(
I big thanks to byundt who really should think about using his talent for teaching.
Or maybe you already are?
Best regards
/Jide
Sorry about the assignment question, I wont do it again. =(
I big thanks to byundt who really should think about using his talent for teaching.
Or maybe you already are?
Best regards
/Jide
jide85,
There is nothing wrong with asking homework questions in Experts-Exchange. People do it all the time. Just be sure that you are up front about your purpose. That way, the experts trying to help will be in coaching mode rather than "here is the exact answer."
This thread (and how we ought to respond to it) was discussed extensively in a private forum by the Mods, Zone Advisors, Administrators and Page Editors. I don't normally look at Math & Science questions, but peeked into this thread due to the discussion. Rather than debate how we ought to handle it, I decided to lead by example.
Since you were trying "to impress a girl", I decided to augment the discussion with some background material. I'm glad you appreciated my efforts. Thanks for the kind words and grade!
Brad
There is nothing wrong with asking homework questions in Experts-Exchange. People do it all the time. Just be sure that you are up front about your purpose. That way, the experts trying to help will be in coaching mode rather than "here is the exact answer."
This thread (and how we ought to respond to it) was discussed extensively in a private forum by the Mods, Zone Advisors, Administrators and Page Editors. I don't normally look at Math & Science questions, but peeked into this thread due to the discussion. Rather than debate how we ought to handle it, I decided to lead by example.
Since you were trying "to impress a girl", I decided to augment the discussion with some background material. I'm glad you appreciated my efforts. Thanks for the kind words and grade!
Brad