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2 years ago

How can you tell if a decimal can be written as a rational number?

2 answers:

4 0

In general, any decimal that ends after a number of digits such as 7.3 or −1.2684 is a rational number.

Hope this helps

Lubov Fominskaja [6]2 years ago

3 0

Answer:

any decimal that ends after a number of digits such as 7.3 or −1.2684 is a rational number

Step-by-step explanation:

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Dennis_Churaev [7]

Answer:

Step-by-step explanation:

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2 years ago

At what angle does a diffraction grating produce a second-order maximum for light having a first-order maximum at 20.0 degrees?

hichkok12 [17]

Answer:

At 43.2°.

Step-by-step explanation:

To find the angle we need to use the following equation:

$d*sin(\theta) = m\lambda$

Where:

d: is the separation of the grating

m: is the order of the maximum

λ: is the wavelength

θ: is the angle

At the first-order maximum (m=1) at 20.0 degrees we have:

$\frac{\lambda}{d} = \frac{sin(\theta)}{m} = \frac{sin(20.0)}{1} = 0.342$

Now, to produce a second-order maximum (m=2) the angle must be:

$sin(\theta) = \frac{\lambda}{d}*m$

$\theta = arcsin(\frac{\lambda}{d}*m) = arcsin(0.342*2) = 43.2 ^{\circ}$

Therefore, the diffraction grating will produce a second-order maximum for the light at 43.2°.

I hope it helps you!

6 0

2 years ago

What equation results from completing the square and factoring x2+2×=9

Arturiano [62]

The answer should be A. If you need work I can show you.

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2 years ago

Deviance is best defined as

Licemer1 [7]

Answer:

I don't think devlance is a real word but maybe u r trying to sat deviance The answer might be B

Step-by-step explanation:

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2 years ago

Find it ASAP What is the whole 85% of 17

Paraphin [41]

If you're just trying to find 85% of 17, you would do 17 * .85 which gives us 14.45

4 0

2 years ago