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3 years ago

Movement of a stationary object

Physics

1 answer:

castortr0y [4]3 years ago

5 0

That is a paradox b/c stationary means not moving

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The second-order bright fringe in a single-slit diffraction pattern is 1.35 mm from the center of the central maximum. The scree

Dafna11 [192]

Answer:

The wavelength is 754.2 nm.

Explanation:

Given that,

Diffraction pattern y= 1.35 mm

Width = 0.838 mm

Distance D= 75 cm

We need to calculate the wavelength

Using formula of diffraction pattern

$y=\dfrac{m\lambda D}{d}$

$\lambda=\dfrac{yd}{mD}$

Where, y = diffraction pattern

m = order

d = width

D = distance

Put the value into the formula

$\lambda=\dfrac{1.35\times10^{-3}\times0.838\times10^{-3}}{2\times75\times10^{-2}}$

$\lambda=7.542\times10^{-7}\ m$

$\lambda=754.2\ nm$

Hence, The wavelength is 754.2 nm.

4 0

3 years ago

An incident ray strikes a piece of diamond at an angle of 40.5 degrees. The index of refraction of air is 1.0003 and the index o

horrorfan [7]

The angle of refraction is 15.6 deg.

When a ray of light passes from medium 1 to medium 2, the refractive index of medium 2 with respect to 1 is the ratio of the absolute refractive index of medium 2 and medium 1

$_1n_2 =\frac{n_2}{n_1}$

When light passes from air into diamond, with the given values of refractive indices,

$_an_d =\frac{n_d}{n_a} =\frac{2.42}{1.0003} =2.4193$

According to Snell's law,

$_an_d=\frac{sini}{sinr} \\ sinr=\frac{sini}{_an_d} =\frac{sin(40.5)}{2.4193}=0.2684\\ r=arcsin(0.2684)=15.57 deg$

The angle of refraction is 15.6 deg

7 0

4 years ago

Read 2 more answers

At what speed, as a fraction of c , is a particle's total energy twice its rest energy

WINSTONCH [101]

The rest energy of a particle is
$E_0=m_0 c^2$
where $m_0$ is the rest mass of the particle and c is the speed of light.

The total energy of a relativistic particle is
$E=mc^2 = \frac{m_0 c^2}{ \sqrt{1- \frac{v^2}{c^2} } }$
where v is the speed of the particle.

We want the total energy of the particle to be twice its rest energy, so that
$E=2E_0$
which means:
$\frac{m_0c^2}{ \sqrt{1- \frac{v^2}{c^2} } }=2m_0 c^2$
$\frac{1}{ \sqrt{1- \frac{v^2}{c^2} } }=2$
From which we find the ratio between the speed of the particle v and the speed of light c:
$\frac{v}{c}= \sqrt{1- (\frac{1}{2})^2 } =0.87$
So, the particle should travel at 0.87c in order to have its total energy equal to twice its rest energy.

3 0

3 years ago

How does surface texture affect friction

Nadya [2.5K]

Answer:

The rougher a surface is, the more friction it can create.

Explanation:

The rougher a surface is, the more "holes" are on the edge which means things can get caught on in because multiple holes can catch each other.

4 0

3 years ago

According to the picture, what is the truck doing?

Slav-nsk [51]

Answer:

but were is the picture

how can we see

4 0

3 years ago