Answer:
The wavelength of the radio wave is 3.003 m.
The energy of the radio wave is .
Explanation:
Frequency of the radio waves, ν = 99.9 MHz =
Wavelength and frequency are related to each other by realtion:
= Wavelength of the wave
c = speed of the light
ν = Frequency of the wave
The wavelength of the radio wave is 3.003 m.
The energy of the electromagnetic wave is given by Planck's equation:
h = Planck's constant =
The energy of the radio wave with 99.9 MHz frequency will be:
The energy of the radio wave is .
E. 0.42 meters / second
Since you are finding the average speed, you don't need to factor in all the stops Mary makes on her way to her final destination. Add the total distance she walked ( 80 + 125 + 45 ) and divide it by the amount of time IN SECONDS that it took for her to do this. Since the time given is in minutes, simply multiply the number of minutes ( 10 ) by 60 ( the amount of seconds in a minute ). Then divide the total number of meters walked by the total amount of seconds it took to walk, and you will get your average speed.
( Also, this is a Physics question, not Chemistry :D )
Answer:
Protons
Explanation:
Protons are worth 1, while neutrons are neutral and are worth zero.
Answer:
Cerium-140 (Ce)
Explanation:
Cerium-140 has 52 protons and 82 neutrons and is stable.