is it ?
a) 75
b)7500
c)750,000
d)75 million
e)750 million
2006-10-11 10:41:05 · 3 answers · asked by steve_felicia_ramirez 1 in Science & Mathematics ➔ Earth Sciences & Geology
Divide the speed of light (3*10^8 m/s) by the wavelength (4*10^-7 m) to get .75*10^15 Hz or 750*10^12 Hz or 750 million Mhz, answer e.
2006-10-11 11:19:43 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋
velocity = wavelength * frequency, so making use of algebra, frequency = velocity / wavelength. (approximating velocity of sunshine, so answer no longer precisely perfect) velocity = 3 x 10^5 km/s. changing to meters: velocity = 3 x 10^8 m/s wavelength = 4000 Angstroms = 4000 x 10^-10 m So frequency = (3.0 x 10^8 m/s) / 4000 x 10^-10 m, = then you definately calculate the flexibility of 10, it somewhat is 8 - (-10) = 18, and positioned the different words at the same time: (3.0 / 4000) x 10^18 Hz = Cancel one thousand from the 4000 and 10^18: (3.0 / 4) x 10^15 Hz = 0.seventy 5 x 10^15 Hz = 7.5 x 10^14 Hz There are 10^6 Hz in a million MHz: 7.5 x 10^14 Hz * (a million MHz/10^6 Hz) = 7.5 x 10^8 MHz, very final answer
2016-12-08 13:02:53 · answer #2 · answered by girardot 4 · 0⤊ 0⤋
B.
2006-10-11 10:54:14 · answer #3 · answered by Jason W 4 · 0⤊ 0⤋