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3 years ago

Help me please Which of the following statements best describes the atoms and molecules that make up a glass

Physics

1 answer:

Nataliya [291]3 years ago

7 0

Answer:

The correct option is;

The atoms and molecules of the liquid water are moving, while the atoms and molecules of the glass are not moving

Explanation:

Matter that exist in the liquid or gaseous state consist of molecules that move freely about in the entire containing medium for gas, while the molecules move freely in the portion of the container occupied by the fluid in the case of liquid fluids

However, the molecules of a solid are fixed within the current shape of the solid and are only free to vibrate within a fixed location and the allow the passage of subatomic particles such as electrons

As such, the glass cup being a solid, consists of molecules fixed in space, while the liquid water consists of molecules which can translate within the portion of the volume of the glass filled with the water.

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Blue light of wavelength λ passes through a single slit of width d and forms a diffraction pattern on a screen. If we replace th

ololo11 [35]

Answer:

We can retain the original diffraction pattern if we change the slit width to d) 2d.

Explanation:

The diffraction pattern of a single slit has a bright central maximum and dimmer maxima on either side. We will retain the original diffraction pattern on a screen if the relative spacing of the minimum or maximum of intensity remains the same when changing the wavelength and the slit width simultaneously.

Using the following parameters: y for the distance from the center of the bright maximum to a place of minimum intensity, m for the order of the minimum, λ for the wavelength, D for the distance from the slit to the screen where we see the pattern and d for the slit width. The distance from the center to a minimum of intensity can be calculated with:

$y\approx\frac{m\lambda D}{d}$

From the above expression we see that if we replace the blue light of wavelength λ by red light of wavelength 2λ in order to retain the original diffraction pattern we need to change the slit width to 2d:

$y\approx\frac{m\lambda D}{d} =\frac{m2\lambda D}{2d}$

7 0

4 years ago

A 2.0 kg bucket is attached to a horizontal ideal spring and rests on frictionless ice. You have a 1.0 kg mass

bogdanovich [222]

Answer:

x = A cos (w \sqrt{2y_{o}/g})

a) maximun Ф= \sqrt{\frac{2}{3} \frac{2 y_{o} }{g} }

b) minimun Ф = $\frac{\pi }{2}$ - \sqrt{\frac{2}{3} \frac{2 y_{o} }{g} }

Explanation:

For this exercise let's use kinematics to find the time it takes for the mass to reach the floor

y = y₀ + v₀ t - ½ g t²

as the mass is released from rest, its initial velocity is zero (vo = 0) and its height upon reaching the ground is zero (y = 0)

0 = y₀ - ½ g t²

t = $\sqrt{2y_{o}/g}$

The bucket-spring system has a simple harmonic motion, which is described by

x = A cos wt

in this expression we assumed that the phase constant (Ф) is zero

let's replace the time

x = A cos (w \sqrt{2y_{o}/g})

this is the distance where the system must be for the mass to fall into it.

a) The new system has a total mass of m ’= 3.0 kg, so its angular velocity changes

w = $\sqrt{k/m}$

In the initial state

w = \sqrt{k/2}

When the mass changes

w ’= \sqrt{k/3}

the displacement in each case is

x = A cos (wt)

for the new case

x ’= A cos (w’t + Ф)

the phase constant is included to take into account possible changes due to the collision of the mass.

we see that this maximum expressions when the cosine is maximum

cos (w´t + Ф) = 1

w’t + Ф = 0

Ф = -w ’t

Ф = - $\sqrt{k/3}$ $\sqrt{2y_{o}/g}$

\sqrt{\frac{2}{3} \frac{2 y_{o} }{g} }

b) the function is minimun if

cos (w’t + fi) = 0

w’t + Ф = π / 2

Ф = π / 2 - w ’t

Ф = $\frac{\pi }{2}$ - \sqrt{\frac{2}{3} \frac{2 y_{o} }{g} }

8 0

3 years ago

you arrive at an intersection with traffic lights that arent working because of a power outage .what do you do

ElenaW [278]

Use it as a four way stop.

6 0

3 years ago

Read 2 more answers

What do you notice about the angle of earth?

Butoxors [25]

Answer:

Explanation:

Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, that is, the plane of Earth's orbit around the sun. The tilt in the axis of the Earth is called its obliquity by scientists. ... Over the course of a year, the angle of tilt does not vary

7 0

3 years ago

Read 2 more answers

Ang larong Latin at Sisiw ay________________________.

brilliants [131]

larong pinoy

Explanation:

ito ay larong Pinoy

3 0

3 years ago