1A.9 problem

[Jazlyn Romero 1I]

A college student recently had a busy day. Each of the student’s activities on that day (reading, getting a dental x-ray, making popcorn in a microwave oven, and acquiring a suntan) involved radiation from a different part of the electromagnetic spectrum. Complete the following table and match each type of radiation to the appropriate event:

In the third, column, we are given 300 MHz, how would we convert this to Hz to be able to solve for wavelength? Thanks!

[Melody Haratian 2J]

Hi! You can convert MHz to Hz by multiplying MHz by 10⁶. So 300 MHz * 10⁶ would be the amount of MHz in Hz.

[kristinalaudis3e]

To convert 300 MHz to Hz you would multiply it by 10^6. This is because Hz refers to the frequency, in which one cycle goes every second. MHz or Megahertz indicates millions, which is 1 x 10^6. I hope this helps!

[Kaiya_PT_1H]

Does anyone else get an answer of the wavelength being 1 m? In the back of the book it says the answer is 1 nm but I don't see how I'm getting it wrong somehow.

[kateraelDis1L]

I'm getting that too...^^

[Silvi_Lybbert_3A]

Does anyone else get an answer of the wavelength being 1 m? In the back of the book it says the answer is 1 nm but I don't see how I'm getting it wrong somehow.

I also am getting this, and I'm led to believe the book must have made a typo because they do say that the wavelength corresponds to microwaving popcorn and microwaves occur from 1 to 10^-3 m. 1 nm would be x-ray I believe, and the book does not list this activity to correspond with this answer.

[jadensteplight_2F]

Going off of that last reply, I have heard of a few typos in the book's answer key. This could be one of them.

[Kaiya_PT_1H]

okay cool, glad it's not just me! I think based on the range for microwaves it would make sense anyway, as Silvi said.