frequency's unit is Hz which mean cycles per second
given frequency * wavelength = speed of wave
speed of light = 3x10^8 m/s
wavelength = 680nm = 680x10^-9 m
frequency * 680x10^-9 m = 3x10^8 m/s
frequency = 3x10^8 / 680x10^-9
= 4.41x10^14 Hz
= 441x10^12 Hz
= 441 THz
which is the frequency for red light
It’s b you better pick b because it’s b
Answer:
I think this is already answered.
Explanation:
Gomez has an evening class after ballet practice. He tries to stay alert in class, but his instructor tends to speak in a monotone voice, which makes it difficult for Gomez to focus. One strategy to remain attentive would be to show empathy, respect, and genuine interest in the lecture predict and ask questions show that he is listening focus on ballet.
The bottom part is an answer
Can you be a little more descriptive? Thanks
He stated that United States should provide support to free people who are continuously resisting and showing oppressiveness against outside pressure or armed minorities.
<u>Explanation:</u>
President Harry S Truman provided 18 minute speech before joint session of congress on 12th March 1947.
Truman stated that U.S. should provide all aids (financial/political/military) to nations which are under threat from internal or external forces. Truman Doctrine marked change in U.S. international policy to containment from isolationism. As an immediate effect in 1947, his effort helped Greek and Turkish to fight against communist.
