Describe what is happening within the system when it is at equilibrium in terms of concentrations

Answer:

Speed of light changes

Explanation:

Since glass is denser than air so the speed of light in glass is less than in air so light rays bend i.e. refract.

Light refracts when traveling from air into glass due to a change in speed caused by differences in optical density. The process, governed by Snell's Law, results in the bending of light towards the normal line as it enters the denser medium.

Light refracts when traveling from air into glass because light waves undergo a change in speed when they pass from one medium to another. This process is known as refraction. Refraction occurs because there is a change in light's propagation speed due to the difference in optical density between air and glass. When light rays propagate from air (less optically dense) into glass (more optically dense), they bend towards the normal line—a line perpendicular to the boundary between the two media. This bending happens according to Snell's Law, which relates the angle of incidence to the angle of refraction, taking into account the refractive indices of the two media.

Answer:

118 N

Explanation:

Given mass of the block, m = 4.00kg.

The acceleration of the elevator, a = 3.0 m/s^2.

As elevotar attaced with spring scale and accelerating upward

(block and elevator), so total force

[tex]F_N-mg=ma[/tex]

Here, mg is the weight of the block downward direction.

or

[tex]F_N=ma+mg=m(g+a)[/tex]

substitute the given value, we get

[tex]F_N=4kg(9.8m/s^2+3m/s^2)[/tex]

     = 117.6 N = 118 N.

Thus, the reading on the spring scale to 3 significant figures is 118 N.

Answer:

Explanation:

The combined wave only end up been more powerful than the Longitudinal wave. This means, the transverse wave is more powerful than the combined wave. In transverse wave, the oscillation is perpendicular to the direction of the wave, while in longitudinal wave, the motion of the movement of the object is parallel to the movement of the wave. And in combined wave, the movement of the medium is in a circular manner,

Answer:

a) 0.3965 j

b) 0.3112 m

Explanation:

The picture attached explains it all. Thank you

Answer:9.5 seconds(approx.)

Explanation:time=distance/speed

here,

distance=3.3 km= 3300 m

standard speed of sound=344 m/s

so, time=3300/344

time=9.5(approx.)

Final answer:

It would take approximately 9.71 seconds for the sound of a shot to travel 3.3 km and reach you, using the speed of sound of 340 m/s.

Explanation:

To calculate how long it would take for you to hear the sound of a shot fired from 3.3 km away, we need to use the speed of sound. In general, the speed of sound is approximately 340 meters per second (m/s) at sea level under normal conditions. Therefore, we can use the formula:

Time = Distance / Speed of Sound.

Now we simply plugin the values to get:

Time = 3300 meters / 340 m/s = 9.71 seconds

Therefore, it would take approximately 9.71 seconds for the sound of the shot to travel 3.3 km and reach you.

Answer:

Explanation:

Given that,

Force is downward I.e negative y-axis

F = -2 × 10^-14 •j N

Magnetic field is westward, +x direction

B = 8.3 × 10^-2 •i T

Charge of an electron

q = 1.6 × 10^-19C

Velocity and it direction?

Force in a magnetic field is given as

F = q(V×B)

Angle between V and B is 270, check attachment

The cross product of velocity and magnetic field

F =qVB•Sin270

2 × 10^-14 = 1.6 × 10^-19 × V × 8.3 × 10^-2

Then,

v = 2 × 10^-14 / (1.6 × 10^-19 × 8.3 × 10^-2)

v = 1.51 × 10^6 m/s

Direction of the force

Let x be the direction of v

-F•j = v•x × B•i

From cross product

We know that

i×j = k, j×i = -k

j×k =i, k×j = -i

k×i = j, i×k = -j OR -k×i = -j

Comparing -k×i = -j to given problem

We notice that

-F•j = q ( -V•k × B×i)

So, the direction of V is negative z- direction

V = -1.51 × 10^6 •k m/s

Answer:

For steam, heat released E = 15.26KJ

For water, heat released E2 = 6.91KJ

Explanation:

Given;

Mass(steam) ms = 25g

Mass (water) mw = 25g

Change in temperature of both steam and water ∆T = 100-34= 66°C

Specific heat of water C = 4.186 J/g.°C

Specific Latent heat L = 334J/g

For steam;

Heat released E = msL + msC∆T

E = (25×334) + (25×4.186×66)

E = 15256.9J

E = 15.26KJ

For water;

Heat released E2 = mwC∆T

E2 = 25×4.186×66

E2 = 6906.9J

E2 = 6.91KJ

Answer:

a.auditory ossicles

b.oval window

c.Round window

d.tympanic membrane

Answer is tympanic membrane

Explanation:

The tympanic membrane otherwise called the ear drum is a membrane shaped like a cone,it connects the outside to the inner ear,it serves to convert vibration from air into fluid membrane vibration a good example of mechanical waves for onwatd transmission into the cochlea of the inner ear through the oval window

Sound waves are converted into mechanical movements by the ear, specifically through structures in the middle and inner ear. The eardrum, ossicles, and cochlea play significant roles in this process, with the final conversion to electrical signals occurring in the cochlea.

Sound waves are converted into mechanical movements by the ear, specifically the structures within the middle and inner ear.

When sound waves enter the ear, they strike the eardrum or tympanic membrane in the middle ear, causing it to vibrate. These vibrations are then transferred to three tiny bones in the middle ear called the ossicles, consisting of the malleus, incus, and stapes. The vibrations move these bones, with the stapes pushing into the oval window of the cochlea in the inner ear.

The cochlea is filled with fluid and lined with tiny hair-like structures called stereocilia. The mechanical movement from the ossicles creates waves in this fluid, which cause the stereocilia to move. This movement is converted into electrical signals that the brain interprets as sound.

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Answer:

The atmospheric pressure and boiling point are directly proportional

Increasing atmospheric pressure increases the boiling point also

Explanation:

The atmosphere contain molecules that are in constant motion. They exert a downward force on a liquid’s surface. The higher the air pressure, the harder it is for the liquid to evaporate. Therefore, the boiling point of a solvent or liquid is affected by the atmospheric pressure and boiling point is raised.

A liquid in a high pressure environment boils at a higher temperature.

When placed in a lower pressure environment it boils at a lower temperature.

Answer:

12 RPM

Explanation:

I would calculate the distance from the edge to the center, and then multiple that by 3RPM with 2 m/sec

Answer:

A) energy similar to radiant heat from the sun

Answer:

[tex]1.8\times 10^{-5}/K[/tex]

Explanation:

Volume of glass flask,[tex]V_0=1000 cm^3[/tex]

[tex]T_1=1.00^{\circ} C[/tex]

[tex]T_2=52.0^{\circ} C[/tex]

Over flow[tex]\Delta V=8.25 cm^3[/tex]

Coefficient of mercury=[tex]\beta_{Hg}=18.0\times 10^{-5}/K[/tex]

[tex]\Delta V_{Hg}=\beta_{Hg}V_0(T_2-T_1)=18\times 10^{-5}\times 1000\times (52-1)[/tex]

[tex]\Delta V_{Hg}=9.18 cm^3[/tex]

[tex]\Delta_{gass}=\Delta V-\Delta_{Hg}=9.18-8.25=0.93 cm^3[/tex]

[tex]\beta_{gass}=\frac{\Delta V_{gass}}{V_0(T_2-T_1)}[/tex]

[tex]\beta_{gass}=\frac{0.93}{1000\times (52-1)}[/tex]

[tex]\beta_{gass}=1.8\times 10^{-5}/K[/tex]

Hence, the coefficient of volume expansion of the glass=[tex]1.8\times 10^{-5}/^{\circ} C[/tex]

The coefficient of volume expansion of the glass [tex]\bold { 1.8 x 10^-^5\ K^-^ 1}[/tex]

Given here,

Volume of the glass flask = 1000[tex]\bold {cm^3}[/tex]

Initial temperature = 1[tex]\bold{^oC}[/tex]

Final temperature = 52 [tex]\bold{^oC}[/tex]

[tex]\bold{ \Delta V = V_0 \beta \Delta T}[/tex]

Where,

[tex]\bold {\Delta V}[/tex] - Change in volume

[tex]\bold{V_0}[/tex] - initial volume = 1000cm

[tex]\bold {\beta }[/tex] -  coefficient of volume expansion

[tex]\bold{\Delta T }[/tex] - temperature [tex]\bold { = T_2- T_1}[/tex]

Put the values in the formula

[tex]\bold {\Delta V_H_g = 18\times 10^-^5 \times 1000\times 51}\\\\\bold {\Delta V_H_g = 9.18 cm^3}[/tex]

[tex]\bold {\Delta Vglass = \Delta V_H_g - \Delta _H_g}\\\\\bold {\Delta Vglass = 9.18 -8.25 }\\\\\bold {\Delta Vglass = 0.93 cm^3}[/tex]

So,  coefficient of volume expansion for gas,

[tex]\bold {\beta glass = \dfrac {0.93 }{1000 \times 51}}\\\\\bold {\beta glass = 1.8 x 10^-^5\ K^-^ 1}[/tex]

The coefficient of volume expansion of the glass [tex]\bold { 1.8 x 10^-^5\ K^-^ 1}[/tex]

To know more about coefficient of volume expansion,

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Answer:

  (c)  n1 = n2

Explanation:

You want to know what can be said about the indices of refraction when a light ray continues on a straight path from one medium to another.

When a wave passes through media where the index of refraction changes, its path will be bent in accordance with Snell's law. When the index of refraction does not change, the path will remain unbent.

The figure shows the path of the ray is a straight line, so we can conclude ...

  n1 = n2 . . . . . choice C

__

Additional comment

Even if the indices are different, the path will remain straight if the angle of incidence is 0—the path is normal to the interface between media. Here, the path is not shown as normal to the interface.

Answer:

joule

Explanation:

every unit for Energy is joule J

The acceleration of the cart can be calculated using the equation a = (F - f) / m, where F is the applied force, f is the friction force, and m is the mass of the cart.

The acceleration of the cart can be expressed using Newton's second law, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Therefore, the acceleration (a) of the cart can be calculated using the equation:

a = (F - f) / m

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Answer: B

Explanation:

Answer:

The second kinetic energy is 162 J.

Explanation:

Given that,

Mass, [tex]m_1=15\ g[/tex]

Velocity, [tex]v_1=7\ cm/s[/tex]

Kinetic energy, [tex]K_1=147\ ergs[/tex]

Mass, [tex]m_2=10\ g[/tex]

Velocity, [tex]v_2=9\ cm/s[/tex]

We need to find kinetic energy [tex]K_2[/tex]. Kinetic energy is given by :

[tex]K=\dfrac{1}{2}mv^2[/tex]

So,

[tex]\dfrac{K_1}{K_2}=\dfrac{m_1}{m_2}\times \dfrac{v_1^2}{v_2^2}\\\\K_2=\dfrac{K_1}{\dfrac{m_1}{m_2}\times \dfrac{v_1^2}{v_2^2}}\\\\K_2=\dfrac{147}{\dfrac{15}{10}\times \dfrac{7^2}{9^2}}\\\\K_2=162\ J[/tex]

So, the second kinetic energy is 162 J.

Answer:

The mass of the wheel is 2159.045 kg

Explanation:

Given:

Radius [tex]r = 0.330[/tex]

m

Force [tex]F = 290[/tex] N

Angular acceleration [tex]\alpha = 0.814 \frac{rad}{s^{2} }[/tex]

From the formula of torque,

 Γ [tex]= I\alpha[/tex]                                        (1)

 Γ [tex]= rF[/tex]                                       (2)

[tex]rF = I \alpha[/tex]

Find momentum of inertia [tex]I[/tex] from above equation,

[tex]I = \frac{rF}{\alpha }[/tex]

[tex]I = \frac{0.330 \times 290}{0.814}[/tex]

[tex]I = 117.56[/tex] [tex]Kg. m^{2}[/tex]

Find the momentum inertia of disk,

 [tex]I = \frac{1}{2} Mr^{2}[/tex]

[tex]M = \frac{2I}{r^{2} }[/tex]

[tex]M = \frac{2 \times 117.56}{(0.330)^{2} }[/tex]

[tex]M = 2159.045[/tex] Kg

Therefore, the mass of the wheel is 2159.045 kg

Answer:

Mostly absorbed and transmitted toward Earth's surface

Explanation:

Infrared radiation from the sun reaches the Earth's surface and warms the Earth's surface. It emits some infrared radiation, some absorbed by gases such as carbon dioxide in the atmosphere. This is known as the greenhouse effect. and If it don't, radiation from the earth is powerful enough to burn the skin.

so correct answer is Mostly absorbed and transmitted toward Earth's surface

Answer:

mostly absorbed and transmitted toward Earth's surface

Explanation:

Answer:

6.0?

Explanation:

What is the current in this circuit?

A

Hold on, our servers are swamped. Wait for your answer to fully load.

Answer:

The first one is 15.

The second one is 3.0.

Explanation:

You add up all the sides accept the voltage. 2+3+4+6= 15

For the second one you divide the voltage by all the resisters. 45/15=3

The wavelength of an ultrasound with a frequency of 4.257 MHz in the human body is approximately 0.000249 meters or 0.249 mm, calculated using the formula
λ = v/f with the given speed of sound (1060 m/s) and the frequency.

The question is asking to calculate the wavelength of an ultrasound with a frequency of 4.257 MHz in the human body, given the speed of sound in the body is 1.06 km/s. To find the wavelength, we use the formula λ = v/f, where λ is the wavelength, v is the speed of sound, and f is the frequency.

First, we convert the speed of sound from km/s to m/s: 1.06 km/s = 1060 m/s. Then we use the given frequency (f) of 4.257 MHz, which we also convert to Hz: 4.257 MHz = 4.257 x 106 Hz. Now we can calculate the wavelength:

λ = v/f
λ = 1060 m/s / 4.257 x 106 Hz
λ ≈ 0.000249 m

Therefore, the wavelength of the ultrasound in the body is approximately 0.000249 meters or 0.249 mm.

The wavelength of 4.257 MHz ultrasound in the human body, using the speed of sound of 1.06 km/s, is approximately 0.249 mm.

To determine the wavelength of ultrasound in the body given the frequency and the speed of sound, we can use the formula:
lambda = v / f, where
lambda is the wavelength,
v is the speed of sound, and
f is the frequency of the ultrasound wave. The speed of sound in the body is given as 1.06 km/s, which is equivalent to 1060 m/s. The frequency of the ultrasound is 4.257 MHz, or 4.257 x 106 Hz. Plugging these values into the formula:

lambda = 1060 m/s / 4.257 x 106 Hz

The result will yield the wavelength of ultrasound in the human body, measured in meters.

Performing the calculation:
lambda = 1060 / 4.257 x 106
lambda = 0.000249 m or approximately 0.249 mm

The wavelength of 4.257 MHz ultrasound in the human body is therefore about 0.249 mm.

Answer:

Shear modulus is equal to [tex]9.82\times 10^{10}N/m^2[/tex]

Explanation:

We have given area [tex]A=0.030m^2[/tex]

Force is given [tex]F_1=F_2=30\times 10^6N[/tex]

Height of the block d = 0.11 m

Change in height of the block [tex]\Delta d=1.12\times 10^{-3}m[/tex]

Stress is given by

[tex]stress=\frac{force}{area}[/tex]

[tex]stress=\frac{30\times 10^6}{0.030}=10^9N/m^2[/tex]

Strain is equal to

[tex]strain=\frac{\Delta d}{d}[/tex]

[tex]strain=\frac{1.12\times 10^{-3}}{0.11}=10.18\times 10^{-3}[/tex]

Shear modulus is equal to

Shear modulus [tex]=\frac{stress}{strain}[/tex]

[tex]=\frac{10^9}{10.18\times 10^{-3}}=9.82\times 10^{10}N/m^2[/tex]

A. True

According to the Faraday-Lenz law, the current in the rotor is generated by the change in the magnetic flux due to the rotating stator, the polarity of the induced current is such that it produces a magnetic field that opposes the change in magnetic flux that produced it. Which causes the rotor to turn

Answer:

A) volume flow rate = 0.047 m3/s

B) mass flow rate = 39.01 kg/s

Explanation:

Detailed explanation and calculation is shown in the image below

Answer:

Both Technicaian A and B is correct

Explanation:

An alternator is a device that converts mechanical energy into electrical energy. In every alternator, there is unavoidable power losses. Such losses could be mechanical,drive belt or getting the alternator's bearing heated and electrical loss.more also changing magnetic field also causes some losses in an alternator. The diodes of an alternator get hot when there is drop in votage.At reasonable maximum engine speeds, For instance when it read 1500 RPM to redline and there is heavy loads, starting from the idle through the red line with light electrical accessory loads, Nothing will happen to battery, it will just goes along for the ride. Unless it wait for the alternator to fall below operating speeds.

Therefore, when technician A says that to perform a maximum output test on a typical heavy-duty truck charging circuit, the engine should be run at 1500 rpm, and Technician B says that alternator rpm is typically at least three times engine rpm. Both of them is is correct.

Answer:

8 ampere

Explanation:

P= V x I

so

I = P/V

I= 24 /3

I = 8 A

Explanation:

Given that,

Diameter of the gold wire, d = 0.84 mm

Radius, r = 0.42 mm

Electric field in the wire, E = 0.49 V/m

(a) Electric current density is given by :

[tex]J=\dfrac{I}{A}[/tex]

And electric field is :

[tex]E=\rho J[/tex]

[tex]\rho[/tex] is resistivity of Gold wire

So,

[tex]E=\dfrac{\rhi I}{A}\\\\I=\dfrac{EA}{\rho}\\\\I=\dfrac{0.49\times \pi (0.42\times 10^{-3})^2}{2.44\times 10^{-8}}\\\\I=11.12\ A[/tex]

(b) The potential difference between two points in the wire is given by :

[tex]V=E\times l\\\\V=0.49 \times 6.4\\\\V=3.136\ V[/tex]

(c) Resistance of a wire is given by :

[tex]R=\rho \dfrac{l}{A}\\\\R=2.44\times 10^{-8}\times \dfrac{6.4}{\pi (0.42\times 10^{-3})^2}\\\\R=0.281\ \Omega[/tex]

Hence, this is the required solution.

Final answer:

To find the current carried by the gold wire, use Ohm's law. To find the potential difference between two points in the wire 6.4 m apart, multiply the electric field by the distance. To find the resistance of a 6.4-m length of the wire, use the formula R = ρL/A.

Explanation:

To find the current carried by the gold wire, we can use Ohm's law which states that the electric field (E) is equal to the product of the current (I) and the resistance (R) of the wire. Rearranging the equation, we can solve for the current: I = E/R. Given that the diameter of the wire is 0.84 mm, we can calculate the cross-sectional area using the formula for the area of a circle (A = πr^2). With the cross-sectional area, we can find the resistance by using the formula R = ρL/A, where ρ is the resistivity of gold and L is the length of the wire. Finally, we can substitute the values into the equation to find the current carried by the wire.

(b) To find the potential difference between two points in the wire 6.4 m apart, we can multiply the electric field by the distance between the two points: V = E × d.

(c) The resistance of a 6.4-m length of this wire can be found using the formula R = ρL/A, where ρ is the resistivity of gold, L is the length of the wire, and A is the cross-sectional area of the wire.

Answer:

A very massive main- sequence star

Explanation:

Degeneracy pressure refers to pressure expend by dense material , which is composed of fermions, which is an example of electrons in a white dwarf star. According to Pauli exclusion principle, which states that no two fermions can exist in the same quantum state, actually give details about the pressure.

When there is stellar masses that is less than about 1.44 of that of solar masses, there will be gravitational fall in the energy , and the energy will not be sufficient to produce the neutrons of a neutron star, therefore, the fall is abstruptly stopped through the electron degeneracy to form white dwarfs.this result to the creation of an effective pressure that further prevents gravitational fall.

Answer:

1 or 2 or 3

Explanation:

it depends whether the coat is a light or dark colour. if it is lighly coloured it will not absorb heat from the sun and wont melt the snowman. if it is darkly coloured it will be number 1

the coat wont make a difference if the temperature of the snowman is the same and the temperature outside the snoman and the sun isnt shining. the coat would just make him look smart - so number 2

it coul keep in the cold and block out the warmth so number 3