3 years ago

The speed of light is 3.010^8 m/s. Red light has a wavelength of 7 10^-7 m. What is its frequency?

Mathematics

1 answer:

Lemur [1.5K]3 years ago

6 0

Frequency : f=c/lambda=3.0e8/7e-7=3/7*10^15 Hz~4.3*10^14 Hz=430THz

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The width of a kitchen is 4.2 metres.

Zolol [24]

Answer:

11,67

Step-by-step explanation:

In the order to get the answer, we need to get the right measurements. That is turn the cm into m or 60 cm to 0,6 m because 1 cm is 0.01m. How many cupboards in a kitchen that is 4,2 m long? To get the answer just divide 4,2 m with 0,6 m, and that is 11,67 cupboards in a 4,2 m long kitchen.

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3 years ago

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Peirce swims 10 laps in a pool in 8 minutes how much time does it take him to swim 1 lap

Jobisdone [24]

10 laps in 8 minutes

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1 lap in 8/10 (4/5) of a minute

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3 years ago

PLEASE help me with this question and I WILL love you forever But yeah please help me with the question.And EXPLAIN in words how

Rufina [12.5K]

Well on this problem recall area of a rectangle is defined by:

A = lw our w = 1/6 and our l = (x + $\frac{2}{3}$ ) we have let 'x' represent our original length.
$(x + \frac{2}{3} )( \frac{1}{6} )= \frac{11}{72}$
$\frac{1}{6} x+ \frac{2}{18} = \frac{11}{72}$
12x + 8 = 11
12x = 11 - 8
12x = 3
x = $\frac{3}{12} = \frac{1}{4}$ So our original length is $\frac{1}{4}$