Amp "A" - 250W, Amp "B" - 40W
a) Estimate sound level in dB you would expect at a point of 3.5m from a speaker connected to each amplifier.
I think the formula to start with is to convert watts to decibels(B). B = 10xlog (I/1x10[SUP]-12)
okay the superscript isn't working...that's I...
Oops, I meant to write: M=QL where,Q=180.0Kcal and L=539kCal/g?
I'm having trouble figuring out where to use given values in a formula and re-arranging formulas as we haven't gone over it in class yet..
Thanks for your help!
Homework Statement
During exercise a person may give off 180.0 kcal of heat in 30.0 minutes by evaporation of water from the skin. How much water has been lost? The latent heat of evaporation of water is 539 kcal/kg.
[b]2. I believe the formula to use is Q=MxLv
[b]3. I started...