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3 years ago

6

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

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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Evaluate the following expression. 5^-3

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5^-3 is 1/125

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$x =-24$

Step-by-step explanation:

Given

$(\frac{2}{3})(\frac{1}{2}x + 12) = (\frac{1}{2})(\frac{1}{3}x + 14) - 3$

Required

Solve for x

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Open all brackets

$\frac{2}{3}*\frac{1}{2}x + \frac{2}{3}*12 = \frac{1}{2}*\frac{1}{3}x + \frac{1}{2}*14 - 3$

$\frac{2 * 1}{3 *2}x + \frac{2 * 12}{3}= \frac{1 * 1}{2 * 3}x + \frac{1 * 14}{2} - 3$

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Collect like terms

$\frac{1}{3}x - \frac{1}{6}x =7 - 3 -8$

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$\frac{2-1}{6}x =-4$

$\frac{1}{6}x =-4$

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$6 * \frac{1}{6}x =-4 * 6$

$x =-4 * 6$

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