Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1.00 W/m2. (a) If a radar unit leaks 28.9 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away (in cm) must you be to be exposed to an intensity considered to be safe

Idont understand the question

How are period and frequency related to each other? dperiod is the reciprocal of frequency.

Answer;

hot magma rises and pushes up toward the lithosphere, and as it cools it cycles back down toward the core to be heated again.

explanation; convection currents are the circular pathways taken by a fluid that enhances heat transfer by the process known as convection which occurs in fluids.convection currents transfer heat from one place to another by mass motion of a fluid. earth mantle is in a semi-liquid state and behaves like any other fluid, rising up from the bottom of the mantle after becoming hotter and less dense from heat of the earth's core, as the rock loses heat into the earth's crust it becomes cooler and more dense, then sinking back down to the core, then repeating the cycle.

Hello @mmmhhbhb,how are you doing? i will answer each question individually below! i hope it ! remember to contact me if you need further assistance!   1. what is the wave speed of a wave that has a frequency of 100 hz and a wavelength of 0.30 m? 100 hz x .30 m = 30 m/s2. what is the wave speed of a wave that has a frequency of 50 hz and a wavelength of 0.10 m? 50 hz x .10 m = 5 m/s3. what is the frequency of a wave that has a wave speed of 20 m/s and a wavelength of 0.50 m? 20 m/s divided by .50 m = 40 hz4. what is the frequency of a wave that has a wave speed of 80 m/s and a wavelength of 0.20 m? 80 m/s   divided by .20 m = 400 hz5. what is the frequency of a wave that has a wave speed of 120 m/s and a wavelength of 0.40 m? 120 m/s divided by .40 m = 300 hz6. what is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 440 hz? 340 m/s divided by 440 hz = .77 m7. what is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 880 hz? 340 m/s divided by 880 hz = .38 m8. what is the wavelength of a sound wave that has a speed of 250 m/s and a frequency of 400 hz? 250 m/s divided by 400 hz = .63 m9. what is the wave speed of a wave that has a frequency of 50 hz and a wavelength of 2.0 m? 50 hz x 2.0 m = 100 m/s10. what is the wave speed of a wave that has a frequency of 100 hz and a wavelength of 0.50 m? 100 hz x 0.5 m = 50 m/sthat's all, hope i !   you,  darian d.