Final answer:
To calculate the value 46 for the microwave, measure the distance between burn marks on the bread and multiply by 2. Find the frequency of the waves on the microwave and convert it to hertz. Multiply the wavelength by the frequency to get a value close to the speed of light.
Step-by-step explanation:
To calculate the value 46 for the microwave, you will need to measure the distance between two adjacent burn marks on the bread and multiply the result by 2. This will give you the wavelength of the microwaves.
Then, you need to find the frequency of the waves, which is written on the back of the microwave. Look for something like '2,450 MHz'. To convert this frequency to hertz, multiply it by 10^6. Multiply the wavelength by the frequency expressed in hertz.
If you do everything correctly, you will get a number very close to the speed of light, which is about 3 x 10^8 m/s.