PLEASE HELPPPPPP <333​

Answer:

0.647 meters

Explanation:

i did the quiz

Answer:

Value of Q when W = 288 is 192

Explanation:

Given that;

q varies as w [Using ratio property]

Given that value of q = 24

And value of w = 36

Find:

Value of Q when W = 288

Computation:

If Q varies as W

So their ratio must be same

So, using ratio property for find factor

q / w = Q / W

24 / 36 = Q / 288

Q = [24 x 288] / 36

Q = 6,912 / 36

Value of Q when W = 288 is 192

Oh god someone sent something really bad, I only saw it for a few seconds. Honestly you should re post this question, jeez...

Answer:

ΔT = 0.02412 s

Explanation:

We will simply calculate the time for both the waves to travel through rail distance.

FOR THE TRAVELING THROUGH RAIL:

[tex]T_{rail} = \frac{Distance}{Speed\ of\ Sound\ in\ Rail}\\\\T_{rail} = \frac{8.8\ m}{5950\ m/s}\\\\T_{rail} = 0.00148\ s[/tex]

FOR THE WAVE TRAVELING THROUGH AIR:

[tex]T_{air} = \frac{Distance}{Speed\ of\ Sound\ in\ Air}\\\\T_{air} = \frac{8.8\ m}{343\ m/s}\\\\T_{air} = 0.0256\ s[/tex]

The separation in time between two pulses can now be given as follows:

[tex]\Delta T = T_{air}-T_{rail} \\\Delta T = 0.0256\ s - 0.00148\ s\\[/tex]

ΔT = 0.02412 s

Wouldn't it be B because it's a majority pointing to it?

Sorry if i'm wrong.

Answer:

Virtual

Explanation:

Answer:

B. Virtual

Good Luck!

Answer:

4 photovoltaic cells are required to meet monthly energy consumption of the cabin.

Explanation:

Let suppose that PV generation system produces energy at constant energy, the number of photovoltaic system to meet energy consumption of the cabin is:

[tex]n = \frac{E}{\dot E \cdot t}[/tex] (1)

Where:

[tex]E[/tex] - Energy consumption of the PV system, in kilowatt-hours.

[tex]\dot E[/tex] - Power generation of the PV cell, in kilowatts.

[tex]t[/tex] - Working times, in hours.

If we know that [tex]E = 720\,kWh[/tex], [tex]\dot E = 0.25\,kW[/tex] and [tex]t = 720\,h[/tex], then the number of photovoltai cells is:

[tex]n = \frac{E}{\dot E \cdot t}[/tex]

[tex]n = 4[/tex]

4 photovoltaic cells are required to meet monthly energy consumption of the cabin.

Answer:

Convection currents

Explanation:

As hot air cools it sinks back to the surface of the earth, where it gets warmed by the ocean only to rise again. This is called a convection current. Convection currents are defined as room air rising and cold air sinking

~Hope this helps

~Bre

Answer:

D. 10 atoms

Explanation:

Answer:

  w = [tex]\sqrt{\frac{2gy}{r^2 + \frac{1}{2} R^2 } }[/tex]

Explanation:

For this exercise let's start by applying Newton's second law to the mass with the string

                W - T = m a

In this case, as the system is going down, we will assume the vertical directional down as positive.

                T = W - m a

Now we apply Newton's second law for rotational motion to the pulley of radius r. We will assume the positive counterclockwise rotations

                ∑ τ = I α

                T r = I α

the moment of inertia of the disk is

               I = ½ M R²

angular and linear acceleration are related

               a = α r

we substitute

               T r = (½ m R²) (a / r)

               T = ½ m ([tex]\frac{R}{r}[/tex] )² a

we write our two equations

               T = W - m a

               T = ½ m ([tex]\frac{R}{r}[/tex] )² a

we solve the system of equations

              W - m a = ½ m (\frac{R}{r} )² a

              m g = m a [ 1 + ½ (\frac{R}{r} )² ]

             a = [tex]\frac{g}{ 1 + \frac{1}{2} (\frac{R}{r})^2 }[/tex]

this acceleration is constant throughout the trajectory, so with the angular and lineal kinematics relations

             w² = w₀² + 2 α θ

             v² = v₀² + 2 a y

as the system is released its initial angular velocity is zero

              w² = 0 + 2 α θ

              v² = 0 + 2 a y

we look for the angular acceleration

              a =α r

              α = a / r

              α = [tex]\frac{g}{r (1 + \frac{1}{2} (\frac{R}{r})^2 }[/tex]

we look for the angle, remember that they must be measured in radians

             θ = s / r

in this case we approximate the arc to the distance

            s = y

            θ = y / r

we substitute

            w = [tex]\sqrt{2 \frac{g}{ r( \frac{1}{2} (\frac{R}{r})^2 } \frac{y}{r} }[/tex]

            w = [tex]\sqrt{\frac{2gy}{r^2 + \frac{1}{2} R^2 } }[/tex]

    for the simple case where r = R

            w = [tex]\sqrt{ \frac{2gy}{ \frac{3}{2} R^2 } }[/tex]

            w = [tex]\sqrt{ \frac{4}{3} \frac{gy}{R^2} }[/tex]

Answer:

1.33

Explanation:

According to snell's law,

n = sin(a)/sin(b)

Given

a = 25.0°

b = 18.5°

Substitute

n = sin25/sin18.5

n = 0.4226/0.3173

n = 1.33

Hence the index of refraction nb for this type of glass is 1.33

Answer

t = 367.77 s = 6.13 min

Explanation:

According to the law of conservation of energy:

[tex]Heat\ Supplied\ By \ Heater = Heat\ Absorbed\ by\ Glass + Heat\ Absorbed\ by\ Water\\Pt = m_gC_g\Delta T_g + m_wC_w\Delta T_w\\[/tex]

where,

P = Electric Power of Heater =  300 W

t = time required = ?

m_g = mass of glass = 300 g = 0.3 kg

m_w = mass of water = 250 g = 0.25 kg

C_g = speicific heat of glass = 840 J/kg.°C

C_w =  specific heatof water = 4184 J/kg.°C

ΔT_g = ΔT_w = Change in Temperature of Glass and water = 100°C - 15°C

ΔT_g = ΔT_w = 85°C

Therefore,

[tex](300\ W)(t) = (0.3\ kg)(840\ J/kg.^oC)(85^oC)+(0.25\ kg)(4184\ J/kg.^oC)(85^oC)\\[/tex]

t = 367.77 s = 6.13 min

Given the information on the graph, we can confirm that this profile represents the Ocean floor profile.

Therefore, we can confirm that the profile belongs to the ocean floor profile, firstly because of the information provided, as well as it being consistent with the irregularities in the depth of the ocean floor.

To learn more about the Ocean visit:

https://brainly.com/question/11803537?referrer=searchResults

Answer: its d

Explanation:

Answer:

The Nucleus of an atom change

Explanation:

Ap3x

Answer:oxidation number

Explanation:

i just took quiz;)

The ratio of the elements in a binary ionic compound are based on the element's oxidation number.

Oxidation number can be generally described as the number which is allocated to the chemical elements in a chemical combination of different compounds. The oxidation number of an element is basically the number or count of electrons that atoms in a molecule can share, lose or gain while they are forming chemical bonds with the other atoms of a different element or atom.

The oxidation state, or oxidation number is the hypothetical charge which is present on an atom if all of the bonds in an atom to different atoms were fully ionic in nature. Oxidation state describes the degree of oxidation of an atom in a chemical compound or molecule. The oxidation state may be positive, negative or zero depending upon the loss or gain of electrons.

Learn more about Oxidation number here:

https://brainly.com/question/29263066

#SPJ2

Answer:

-7.2 * 10^4 kJ mol-1

Explanation:

First we obtain the change in enthalpy for the reaction;

ΔHrxn= ΔHproducts - ΔHreactants

ΔHrxn=[( −510 ) - (−110.53) + (−277.69)]

ΔHrxn= -121.78 * 3 J mol-1

The we obtain the entropy change of the reaction

ΔSrxn= ΔSproducts - ΔSreactants

ΔSrxn= [(191) - (197.67) + (160.7)]

ΔSrxn= -167.37  J K-1 mol−1

Then we calculate ΔG at 298 K

ΔG = ΔH - TΔS

ΔG = ( -121.78 * 3) - (298) (-167.37)

ΔG = -7.2 * 10^4 kJ mol-1

we know that,

Frequency = 1/ time period

hence, Feq = 1/5 ===> 0.2 Hz

hence, wave velocity = freq * wavelength

hence,

V = 0.2 * 100

==> Wave velocity = 20 m/s

Answer:

3.69 m/s²

Explanation:

weight = mass × Acceleration of gravity

479.96 = 129.72 × Acceleration of gravity

Acceleration of gravity = 479.96/129.72 = 3.69 m/s²

Answer:

* for the condition the velocity in column A is less than in column B

   all the answers are false

* the speed of sound in column A is greater than in column B

      True b and c

Explanation:

This interesting exercise we have a mixture of the resonance conditions and the conditions for the speed of sound.

The resonance condition is that at the closed end we have a node and at the open end a belly

          λ = 4L        first harmonic (fundamental)

The conditions of the speed of sound are

         v = [tex]\sqrt{\frac{B}{ \rho } }[/tex]

the velocity for air is v = 343 m/s at 20ºC and for argon it is v = 670 m/s at 20ºC

Another relationship is that the density of a gas depends on the temperature

            v = v₀ [tex]\sqrt{1 + \frac{T}{273} }[/tex]

v₀ is the speed of sound at 0ºC

let's examine the different answers

* for the condition the velocity in column A is less than in column B

a) False. The resonance does not depend on the diameter but on the length of the column

b) False. The speed of sound in argon is greater than in air, the volume modulus of argon is greater

c) False. The speed depends on the root of the temperature, increasing the temperature increases the speed of sound.

As you can see in this case all the answers are false, let's change the condition

* the speed of sound in column A is greater than in column B

a) False

b) True

c) True

Answer:

Snell's Law states

Ni sin i = Nr sin r

Judging from the question the source of the ray is in the water (directed up)

or NI = 1 / sin 49      Ni = 1.325 deg     the critical angle

From inside the pond:

Nr = 1.325 * sin 45 / 1 = 94 deg  

So refraction can occur  outside the pond and you do not have total internal refection.

Answer:

solidification

Explanation:

a liquid becoming a solid, is called solidification. For any pure substance, the temperature at which melting occurs—known as the melting point—is a characteristic of that substance.

Answer:

D. Friction is the type of force

Answer:

manage your weight better, have stronger bones, have lower blood pressure, less risk of a heart attack, etc.

Answer:

You become healthier, your body starts regulating better, you get stronger bones and muscles, and you lower the risk of diabetes,heart problems and other diseases.

Answer:

c baseball

Explanation:

the baseball traveling at 40m/seg

Answer: Computed tomography (CT) is an imaging tool that combines x-rays with computer technology to produce a more detailed, cross-sectional image of your body. A CT scan lets your doctor see the size, shape, and position of structures that are deep inside your body, such as organs, tissues, or tumors.

So, the answer must be a CT scan. I may be wrong.

Answer:

B. CT SCAN

Explanation:

Edge 2021

Answer:

the number of turns in the winding is 387 turns.

Explanation:

Given;

radius of the solenoid, r = 0.12 m

cross sectional area of the solenoid, A = 20 x 10⁻⁴ m²

current flowing through the solenoid, I = 20 A

the energy of the flowing current, E = 0.1 J

The energy stored in solenoid is given as;

[tex]U = \frac{1}{2} LI^2\\\\L = \frac{2U}{I^2} \\\\L = \frac{2 \times 0.1}{20^2} \\\\L = 5 \times 10^{-4} \ H[/tex]

The number of turns in the winding is calculated as follows;

[tex]L = \frac{\mu_o N^2A}{2\pi r} \\\\N^2 = \frac{2\pi r L}{\mu_o A} \\\\N = \sqrt{\frac{2\pi r L}{\mu_o A}} \\\\N = \sqrt{\frac{2\pi \times 0.12 \times 5\times 10^{-4} }{4\pi \times 10^{-7} \times 20\times 10^{-4} }}\\\\N = 387 \ turns[/tex]

Therefore, the number of turns in the winding is 387 turns.

Answer:

The net force is 0.

Explanation:

If I pull to the left with 400 N and you pull to the right with 400 N, we're going in opposite directions. If the left is negative (-400N) and the right is positive (+400N), add them to get the resultant force.