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
D) selecting random sample allows for a more representative sample in a survey.
Answer:
Affinity
Explanation:
If you want an audience that aligns with your product, you must choose the affinity method. This method picks up preferences of people through online browsing and then segregates people with similar interests and makes sure they are presented with content they might be interested in.
For example google uses this same strategy to find out peoples interests and then showing them what they want to see.
Answer:
It relies on assumptions about the context.
Explanation:
Took the exam. It is the right answer!
Top-down is how we percieve and process from experience.
Answer:
D. A semicolon can be used where you might use a period.
Explanation:
A semicolon can be used where you might used a period if the two sentences are related to each other. Also semicolons are used before words such namely, however, therefore. Semicolons are used to join two independent clauses that are similar/closely related to each other especially those joined by a words which are connectors like and, but, or, nor, e.t.c. If a sentence contain many commas, it is suitable to add a semicolon.
