PLEASE HELP!!! WILL GIVE 30 POINTS!! HAS TO BE CORRECT!


The picture below shows a solar event in the sun's atmosphere.


Which of these events is most likely to occur as a result of the solar event pictured above?


Disruption to electricity power grid

Less aurora activity at the poles

The sun's photosphere would be blocked

The sun's magnetic effect would decrease

Answer: [tex]278\ Hz[/tex]

Explanation:

Given

Distance between two speakers is 8 m

Man is standing 12 away from the wall

When the person moves 3 parallel to the wall

the parallel distances from the speaker become 4+3, 4-3

Now, the difference of distances from the speaker is

[tex]\Delta d=\sqrt{12^2+(4+3)^2}-\sqrt{12^2-(4-3)^2}\\\Delta d=1.85\ m[/tex]

Condition for destructive interference is

[tex]\Delta d=(2n-1)\dfrac{\lambda }{2}=(2n-1)\dfrac{\nu }{2f}\\\\\Rightarrow f=(2n-1)\dfrac{v}{2\Delta d}[/tex]

for second destructive interference; n=2

[tex]\Rightarrow f=(2\times 2-1)\dfrac{343}{2\times 1.85}=278.10\approx 278\ Hz[/tex]

Answer:

2.72*10^-7m

Explanation:

Using the formula

v = fλ

v is the speed

f is the frequency

λ is the wavelength

Substitute for λ

λ = v/f

λ = 2.05 x 10^8/7.55 x 10^14

λ = 2.05/7.55 * 10^{8-14}

λ = 0.272 * 10^-6

λ = 2.72*10^-7m

Hence the wavelength of the wave in carbon tetrachloride is 2.72*10^-7m

Answer:

1) Van der rcf generator

2) the charge is distributed among all the hairs, as they all have the same potential,

the charges are of the same sign repel each other

Explanation:

1.) The object is a Van der rcf generator, which is loaded by friction,

The girl has no load

2) when the girl touches the sphere of the generator part of the electrons of this is transferred to the girl, when this charge reaches the hair, the charge is distributed among all the hairs, as they all have the same potential,

the charges are of the same sign repel each other

Answer:

When we have a current I, we will have a magnetic field perpendicular to this current.

Then if we have a wire in a "spring" form. then we will have a magnetic field along the center of this "spring".

Now suppose we put an iron object in the middle (where the magnetic field is) then we will magnetize the iron object.

Of course, the intensity of the magnetic field is proportional to the current, given by:

B = (μ*I)/(2*π*r)

Where:

μ is a constant, I is the current and r is the distance between to the current.

Now remember that for a resistor:

R = ρ*L/A

R is the resistance, ρ is the resistivity, which depends on the material of the wire, L is the length of the wire, and A is the cross-section of the wire.

If we increase the area of the wire (if we use a thicker wire).

And the relation between resistance and current is:

I = V/R

Where V is the voltaje.

Now, if we use a thicker wire, then the cross-section area of the wire increases.

Notice in the resistance equation, that the cross-section area is on the denominator, then if we increase the area A, the resistance decreases.

And the resistance is on the denominator of the current equation, then if we decrease R, the current increases.

If the current increases, the magnetic field increases, which means that we will have a stronger electromagnet.

Answer: Energy dissipation

As water passes over a spillway and down the chute, potential energy converts into increasing kinetic energy. Failure to dissipate the water's energy can lead to scouring and erosion at the dam's toe (base).

HOPE THIS HELPS

Answer: Energy dissipation

Explanation: As water passes over a spillway and down the chute, potential energy converts into increasing kinetic energy. Failure to dissipate the water's energy can lead to scouring and erosion at the dam's toe (base). Hope this helps. Can u give me brainiliest

Answer:

the far distance is 15 meters

Explanation:

The computation is shown below

The Light from the back of your head must be

= 7.50m - 1.00m

= 6.50m

It should be  the back mirror.

Now 7 m to front mirror and 1.00 m from the front mirror to

Therefore you see the back of your head is

= 7.50m + 1.00m + 6.50m

= 15 meters away

Hence, the far distance is 15 meters

Answer:

b

Explanation:

For given diverging lens(Concave) ; a) The distance of the image is -6 Cm, b) The image is virtual.

The lens that diverge incident parallel beam of light after refraction from the lens, is called diverging or concave lens.

Given data:

a)

        [tex]\frac{1}{f} = \frac{1}{v} - \frac{1}{u} \\[/tex]

        [tex]\frac{1}{-10} = \frac{1}{v} - \frac{1}{-15}\\\frac{1}{-10} = \frac{1}{v} + \frac{1}{15}[/tex]

        [tex]\frac{1}{v} = \frac{1}{-10} -\frac{1}{15} \\\frac{1}{v} = \frac{-3-2}{30} \\[/tex]

         [tex]v = -6 Cm[/tex]

b) Magnification ,

m= ([tex]\frac{v}{u}[/tex])

on putting values,

[tex]m =(\frac{-6}{-15} )=\frac{2}{5} =0.4[/tex]

since m is positive it means the image is virtual

Hence a) distance of image is -6 Cm and b) the image is virtual.

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Answer:

acceleration = - 9.8 m/s²

Explanation:

From the question, we can deduce that the only force that will be acting on the car is gravity and as such the acceleration during free fall will be equal to the acceleration due to gravity but will be negative since it is towards the ground.

Thus, acceleration = - 9.8 m/s²

Answer:

i dont know

Explanation:

do you mean to save the answer or to save your question

Answer:

Uzi

Explanation:

When somebody comes to me I don’t have any

Answer:

It is doubled

Explanation:

f2=2f1

x1=x2=x

W1=f1*x1=f1*x

W2=f2*x2=f2*x=2*(fi*x)=2*W1

Answer:

The correct solution is "64 RPM".

Explanation:

The given values are:

Mass,

M = 2.3 kg

Diameter,

D = 20 cm

i.e.,

   = 0.2 m

Rotates at,

N = 110 rpm

Mass of block,

m = 460 g

i.e.,

   = 0.46 kg

According to angular momentum's conservation,

⇒  [tex]I_1\omega_1=I_2\omega_2[/tex]

then,

⇒  [tex]I_1=\frac{1}{2}MR_2[/tex]

On substituting the values, we get

⇒      [tex]=\frac{1}{2}\times 2.3\times (0.1)^2[/tex]

⇒      [tex]=\frac{1}{2}\times 0.023[/tex]

⇒      [tex]=0.0115 \ kg \ m^2[/tex]

Now,

⇒  [tex]I_2=I_1+2mR^2[/tex]

        [tex]=0.0115+2\times 0.46\times (0.1)^2[/tex]

        [tex]=0.0115+0.0092[/tex]

        [tex]=0.02 \ kg \ m^2[/tex]

then,

⇒  [tex]0.0115\times 110=0.02\omega_2[/tex]

⇒              [tex]1.265=0.02\omega_2[/tex]

⇒                  [tex]\omega_2=\frac{1.265}{0.02}[/tex]

⇒                       [tex]=63.25 \ or \ 64 \ RPM[/tex]

Answer:

It would Be C The temperatures of the stars

Explanation:

Answer:

its b 100 kg

they told m¹ and m²

160‐60

Answer:

c

Explanation:

Wonderful.

Look out below !

Was the FAA notified ?

Answer:

Not all appliances run on energy. Some of them run on gas. Some both. It just depends on the age of the appliance, the make of the appliance, and the company who made it.

Answer:

The angle of reflection is "60°".

Explanation:

The given values are:

Light from monochromatic source,

= 560 nm

Angle of incidence,

= 60°

Surface of fused quartz (n),

= 1.56

Whenever a light ray was indeed occurring at a flat surface, it should be the law or concept of reflection which contains this same rays of light, the reflected ray as well as the "normal" ray at either the mirror surface.

According to the above law,

⇒  [tex]Angle \ of \ incidence=Angle \ of \ reflection[/tex]

then,

⇒  [tex]Angle \ of \ reflection=60^{\circ}[/tex]

Answer:

The force holding you down is gravity.

Explanation:

Gravity is a force between two objects with mass. It pulls things together. You have mass, and the Earth has mass, so gravity tries to pull you and the Earth together. The gravitational force is much bigger for more massive objects.

Answer:

Gravitational Force

Explanation:

Gravitational Force holding everything down

-TheUnknownScientist

Answer:

a)    F = 18.375N, b) F = 24.5 N

Explanation:

This exercise can be solved using the translational equilibrium equations.

Let's start by fixing a reference system with the horizontal x axis and the vertical y axis, from the statement of the exercise I understand that the wall is vertical and the book is supported on it, therefore the applied force is in the direction towards the wall

a) In this part the force that does not allow the movement of the book is requested, therefore the static friction coefficient must be used (μ_s = 0.8)

X axis  

       F - N = 0

       N = F

Y axis

       fr - W = 0

       W = fr

where W is the weight of the book.

The friction force has the formula

       fr = μ_s N

we substitute

       mg = μ_s F

       F = [tex]\frac{mg}{\mu_s }[/tex]

let's calculate

       F = 1.5 9.8 / 0.8

       F = 18.375N

b) In this case the book is moving so the friction coefficient to use is kinetic (   μ_K = 0.6)

       F = [tex]\frac{mg}{\mu_K }[/tex]

we calculate

        F = 1.5 9.8 / 0.6

        F = 24.5 N

Well, my German isn't as sharp as it used to be, but it looks like you're supposed to use the symbols at the top and draw two circuits ... one where the switch is closed and the light is shining, the other where the switch is open and the light is out.

That should be pretty easy for you. Just hook up one battery, one switch, and one light, all in series. Then opening and closing the switch makes the light go on and off.

Answer:

D. An AC circuit

Explanation:

AC= Alternating current

Answer:

1.6 g

Explanation:

Use the formula: W =  m× g

       ∴ g =  W / m

Here, W = 128N

         m = 80 Kg

     ∴ g = 128 ÷ 80

           = 1.6 N (Ans)

Answer:

5. 60 Ω

6. 60 Ω

7. 10 Ω

8. 0.625 KΩ

Explanation:

5. Determination of the equivalent resistance.

Resistor 1 (R₁) = 10 Ω

Resistor 2 (R₂) = 20 Ω

Resistor 3 (R₃) = 30 Ω

Equivalent Resistance (R) =?

Since the resistors are arranged in series connection, the equivalent resistance can be obtained as follow:

R = R₁ + R₂ + R₃

R = 10 + 20 + 30

R = 60 Ω

Thus, the equivalent resistance is 60 Ω

6. Determination of the equivalent resistance.

Resistor 1 (R₁) = 10 Ω

Resistor 2 (R₂) = 35 Ω

Resistor 3 (R₃) = 15 Ω

Equivalent Resistance (R) =?

Since the resistors are arranged in series connection, the equivalent resistance can be obtained as follow:

R = R₁ + R₂ + R₃

R = 10 + 35 + 15

R = 60 Ω

Thus, the equivalent resistance is 60 Ω

7. Determination of the equivalent resistance.

Resistor 1 (R₁) = 6 Ω

Resistor 2 (R₂) = 4 Ω

Equivalent Resistance (R) =?

Since the resistors are arranged in series connection, the equivalent resistance can be obtained as follow:

R = R₁ + R₂

R = 6 + 4

R = 10 Ω

Thus, the equivalent resistance is 10 Ω

8. Determination of the equivalent resistance.

Resistor 1 (R₁) = 10 KΩ

Resistor 2 (R₂) = 2 KΩ

Resistor 3 (R₃) = 1 KΩ

Equivalent Resistance (R) =?

Since the resistors are arranged in parallel connection, the equivalent resistance can be obtained as follow:

1/R = 1/R₁ + 1/R₂ + 1/R₃

1/R = 1/10 + 1/2 + 1/1

Find the least common multiple (lcm) of 10, 2 and 1. The result is 10. Divide 10 by each of the denominator and multiply the result obtained by the numerator. This is illustrated below:

1/R = (1 + 5 + 10) / 10

1/R = 16/10

Invert

R = 10/16

R = 0.625 KΩ

Thus, the equivalent resistance is 0.625 KΩ.

Answer:

720N

Explanation:

180+(40×10)+140=720 remember we can only add with same units ;1kg=10N therefore 40 kg=(40×10)N=400N

The net force would be the summation of all the forces in addition to the weight force of the 40 kg weight, thus the net force of all the forces would come out to be 712.4 Newtons.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

F = ma

As given in the problem we have to find the net force,

Let us assume the acceleration due to gravity would be 9.81 m/s².

The force generated by the 40-kilogram weight =40 ×9.81 Newtons.

The force generated by the 40-kilogram weight = 392.4 Newtons

Net force = 180 + 140 +392.4

                =712.4 Newtons

Thus, the net force of all the forces would come out to be 712.4 Newtons.

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Answer:

true  b, e

Explanation:

The expression that describes the diffraction of a grating is

         d sin θ = m λ

where d is the separation between the slits, m is the order of the spectrum

let's analyze the different answers

a) False. The size (height) of the slits does not influence the resolution, the number of them per unit of length influences, the greater the number, the smaller the distance (d) this they

b) True. The spectrum is resolved on a screen, in the form that each wavelength corresponds to a fixed distance from the central maximum, for a given order

c) False. The exit slit selects a given wavelength, but does not deflect the beam from its path

d) False. The slit lets in light, but does not measure its intensity

e) True. For a continuous spectrum, the wavelength variation that passes through a slit is proportional to its width. For a discrete spectrum the width of the slit does not affect the wavelength

Answer:

[tex]193743.49\ \text{Pa}[/tex]

Explanation:

G = Gravitational constant = [tex]6.674\times 10^{-11}\ \text{Nm}^2/\text{kg}^2[/tex]

M = Mass of Europa = [tex]4.74\times 10^{22}\ \text{kg}[/tex]

R = Radius of Europa = [tex]\dfrac{3130}{2}=1565\ \text{km}[/tex]

h = Depth = 150 m

[tex]\rho[/tex] = Density of water = [tex]1000\ \text{kg/m}^3[/tex]

Acceleration due to gravity is given by

[tex]g=\dfrac{GM}{R^2}[/tex]

Pressure is given by

[tex]P=\rho gh\\\Rightarrow P=\rho \dfrac{GM}{R^2}h\\\Rightarrow P=1000\times \dfrac{6.674\times 10^{-11}\times 4.74\times 10^{22}}{1565000^2}\times 150\\\Rightarrow P=193743.49\ \text{Pa}[/tex]

The submarine should be designed to withstand a pressure of [tex]193743.49\ \text{Pa}[/tex].

The pressure due to column of liquid increases with the gravitational

attraction, density of the liquid and height of the liquid column.

Reasons:

Mass of Europa, M = 4.78 × 10²² kg

Diameter of Europa, r = 3,130 km

Required:

The pressure a submarine must be designed to withstand when submerged to a depth of 150 meters.

Solution:

Gravitational acceleration on Europa is given by the formula;

[tex]\displaystyle g = \mathbf{\frac{G \cdot M}{r^2}}[/tex]

G = Universal gravitational constant = 6.67408 × 10⁻¹¹ m³/(kg·s²)

[tex]Radius \ of \ the \ satellite\ Europa = \dfrac{3,130 \ km}{2} = \mathbf{1,565 \ km}[/tex]

[tex]\displaystyle g = \frac{6.67408 \times 10^{-11} \times 4.78 \times ^{22}}{1565000^2} \approx 1.303[/tex]

The gravitational acceleration on Europa, g ≈ 1.303 m/s²

Therefore;

Pressure due to a liquid's weight, P = ρ·g·h

The pressure at 150 m, P₁₅₀ = 150 × 1.303 × 997 = 194863.65

The pressure the submarine must be designed to withstand is, P₁₅₀ ≈ 194863.65 Pa.

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Answer:

Nuclear fusion

Explanation:

This is because main sequence of star is powered by fusion of hydrogen to helium atoms together and this process releases energy. The energy released when the gas collapse into a protostar make the center of the protostar to be extremely hot. When the core becomes very hot, nuclear fusion can start.