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3 years ago

The wavelength of red light is 7 x 10^-7 meter. Express this value in nanometers

Physics

1 answer:

3241004551 [841]3 years ago

6 0

The wavelength of the red light in "nanometer" is 7× $10^{2}$

Wavelength is given as : 7× $10^{-7}$ meter

1 nanometer = ( $10^{-9}$ meter)

Let X= value of the wavelength in nanometer.

1 nanometer = $10^{-9}$ meter

X nanometer = 7× $10^{-7}$ meter

<em>If we Cross multiply</em>

X nanometer = ( $\frac{ 7* 10^{-7} }{ 10^{-9} }$ )

X= 7× $10^{2}$ nanometer

Therefore, the wavelength in "nanometer" is 7× $10^{2}$

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3 years ago

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4 years ago

A car accelerates in the +x direction from rest with a constant acceleration of a1 = 1.62 m/s2 for t1 = 20 s. At that point the

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Total displacement of the car: 405 m

Explanation:

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$s_1=ut_1+\frac{1}{2}a_1 t_1^2$

where:

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We can also find the velocity of the car after these 20 seconds using the equation:

$v_1 = u +a_1 t_1 = 0 + (1.62)(20)=32.4 m/s$

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$s_2 = (\frac{v_1 + v_2}{2})t_2$