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Daniel [21]
1 year ago
12

An ultraviolet wave traveling through a vacuum has wavelength of 4.0 x 10^-7 m. The waves frequency, written in scientific notat

ion to two significant figures, is ? X10^14Hz.
Physics
1 answer:
Naily [24]1 year ago
5 0

Answer:

λ = c / f     or    f = c / λ

f = 3.0E8 / 4.0E-7 = .75E15 / sec = 7.5E14 / sec = 7.5 X 10^14 /sec

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A) use v=u+at for both

First section, v=27, u=0, a=2.4. You should get 11seconds.
Second section, v=0, u=27, a=-1.3. You should get 21seconds.
This means that the total time is 22seconds.

b) You can either use s=ut+0.5at^2 or v^2=u^2+2as. Personally, I would use the second one as you are not relying on your previous answer.

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3 years ago
How to calculate the slope of position time graph?
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Answer:

The slope of a position-time graph can be calculated as:

m=\frac{\Delta y}{\Delta x}

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\Delta y is the increment in the y-variable

\Delta x is the increment in the x-variable

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Disagree

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