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4 years ago

How do you calculate leap years?

Physics

1 answer:

Vadim26 [7]4 years ago

8 0

Every 4 years is a leap year 2016 is a leap year and so is 2020

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Seberkas cahaya monokromatik dijatuhkan pada kisi difraksi dengan 5000 goresan/cm menghasilkan spectrum garis terang orde kedua

Vlada [557]

Answer:

500 nm

Explanation:

In this problem, we have a diffraction pattern created by light passing through a diffraction grating.

The formula to find a maximum in the pattern produced by a diffraction grating is the following:

$d sin \theta = m\lambda$

where:

d is the distance between the lines in the grating

$\theta$ is the angle at which the maximum is located

m is the order of the maximum

$\lambda$ is the wavelength of the light used

In this problem we have:

$\theta=30^{\circ}$ is the angle at which is located the 2nd-order bright line, which is the 2nd maximum

n = 5000 lines/cm is the number of lines per centimetre, so the distance between two lines is

$d=\frac{1}{d}=\frac{1}{5000}=2\cdot 10^{-4} cm = 2\cdot 10^{-6} m$

Re-arranging the equation for $\lambda$ , we find the wavelength of the light used:

$\lambda=\frac{d sin \theta}{m}=\frac{(2\cdot 10^{-6})(sin 30^{\circ})}{2}=5\cdot 10^{-7} m = 500 nm$

4 0

3 years ago

What is your operational definition for a fast reaction time?

LuckyWell [14K]

Answer:

The ability to react to a certain stimulus with a speedy and effective manner

Explanation:

7 0

3 years ago

Pls help A ball rolls horizontally off a 100-meter-tall cliff at 40 meters per second. How far does the ball travel horizontally

svet-max [94.6K]

First find the time it takes for the ball to reach the ground using the vertical component of its position vector:

$y=y_0+v_{0y}t+\dfrac12a_yt^2$

$\implies0=100\,\mathrm m+\dfrac12\left(-9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)t^2$

$\implies t=4.52\,\mathrm s$

Meanwhile, the horizontal component of the ball's position vector is

$x=x_0+v_{0x}t+\dfrac12a_xt^2$

$\implies x=\left(40\,\dfrac{\mathrm m}{\mathrm s}\right)t$

After about 4.52 s, the ball has traveled a horizontal distance of

$x=\left(40\,\dfrac{\mathrm m}{\mathrm s}\right)(4.52\,\mathrm s)=180.8\,\mathrm m$

which you would round to 200 m, so the answer is B.

8 0

3 years ago

Whats is the definition of Parallel Circuit

Aleksandr-060686 [28]

A parallel circuit is one in which there's a place where the flow of current
can split up and follow different paths.

An example might be:
Two lamps plugged into the same outlet and both turned on.

Current that comes out of the outlet splits up, and parts of it flow
through each lamp.

3 0

3 years ago

Read 2 more answers

The body attempts to fight off an infection by Sleeping Exercise Fever Coughing

erastovalidia [21]

The body fights off an infection by a fever since the higher temperature will denature what is causing the infection

3 0

3 years ago