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
The answer is texting and driving
Answer: dry scrubbers are less than 10% efficient at removing particles less than 1μm in size
Explanation:
A dry scrubber or dry scrubber system is one type of scrubber that is used to remove harmful materials from industrial exhaust gases before they are released into the environment. That substance then falls out of the gas stream or is caught in a particle screen.
Answer:
Europe was part of the Roman Empire until the 5th century. After parting ways, Europe faced its darkest age until 1020, it started making steady progress in the field of agriculture, trade, craftsmanship etc.
Mills, storage, horse harnesses, harvesting, threshing etc improved drastically due to wide contact with people from different regions, spreading their knowledge in Europe.
Crusade trading had also started during the time while Europe faced a spike in population as well.
The East Asian States during this whole time faced many political troubles. Their governments kept on changing continuously from one dynasty to another.
Meanwhile, in these regions, Da-rul-Islam had formed deep roots as a result of which many forms of art and traditions excelled. <em>Muslim scientists continuously made astonishing discoveries one after another</em>.
