# Problem: On its highest power setting, a microwave oven can increase the temperature of 0.425 kg of spaghetti by 45°C in 120 seconds.A) What was the rate of energy absorption, in watts, by the spaghetti, given that its specific heat is 3.76 × 103 J/ (kg°C) (this is about 90% that of water)?B) Find the average intensity of the microwaves absorbed by the spaghetti, in watts per square meter, given that they are absorbed over a circular area 18.5 cm in diameter.

###### FREE Expert Solution

Power:

$\overline{)\begin{array}{rcl}{\mathbf{P}}& {\mathbf{=}}& \frac{\mathbf{Q}}{\mathbf{t}}\\ & {\mathbf{=}}& \frac{\mathbf{m}\mathbf{c}\mathbf{∆}\mathbf{T}}{\mathbf{t}}\end{array}}$

The intensity of wave:

$\overline{){\mathbf{I}}{\mathbf{=}}\frac{\mathbf{P}}{\mathbf{A}}}$

99% (156 ratings) ###### Problem Details

On its highest power setting, a microwave oven can increase the temperature of 0.425 kg of spaghetti by 45°C in 120 seconds.

A) What was the rate of energy absorption, in watts, by the spaghetti, given that its specific heat is 3.76 × 103 J/ (kg°C) (this is about 90% that of water)?

B) Find the average intensity of the microwaves absorbed by the spaghetti, in watts per square meter, given that they are absorbed over a circular area 18.5 cm in diameter.

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Our tutors have indicated that to solve this problem you will need to apply the Energy Carried by Electromagnetic Waves concept. You can view video lessons to learn Energy Carried by Electromagnetic Waves. Or if you need more Energy Carried by Electromagnetic Waves practice, you can also practice Energy Carried by Electromagnetic Waves practice problems.