PLEASE HELP! I'LL GIVE BRAINLEST. PLEASE A RIGHT ANSWER​

Answer:

moving

Explanation:

hope it helped!!!

Answer:

B

Explanation:

Answer:

a. When the magnetic field is constant, there is only a magnetic field in the region of space. When the magnetic field is time dependent, there will be both a magnetic field and an electric field in the region of space.

Explanation:

This is true because according to Maxwell's equation, a time dependent magnetic field produces an electric field.

When the magnetic field is constant, there is no electric field in that region of space. But, when it begins to vary, an electric field is then generated by Maxwell's equation which is given by

CurlE = -dB/dt

So, there is initially no electric field when the magnetic field is constant, but it exists when the magnetic field becomes time dependent.

So when dB/dt = 0

CurlE = 0 ⇒ E = 0

So when dB/dt ≠ 0

CurlE ≠ 0 ⇒ E ≠ 0

Answer:

x₂ = 1.33 m

Explanation:

For this exercise we must use the rotational equilibrium condition, where the counterclockwise rotations are positive and the zero of the reference system is placed at the turning point on the wall

            Στ = 0

            W₁ x₁ - W₂ x₂ = 0

where W₁ is the weight of the woman, W₂ the weight of the table.

Let's find the distances.

Since the table is homogeneous, its center of mass coincides with its geometric center, measured at zero.

           x₁ = 2.5 -1.5 = 1 m

The distance of the person is x₂ measured from the turning point, at the point where the board begins to turn the girl must be on the left side so her torque must be negative

            x₂ = [tex]\frac{M_1g }{m_2 g} \ x_1[/tex]

let's calculate

           x₂ = [tex]\frac{100}{75} \ 1[/tex]

           x₂ = 1.33 m

Answer:

80 A

Explanation:

Hi there!

Ohm's law states that [tex]V=IR[/tex] where V is the voltage, I is the current and R is the resistance.

Plug the given information into Ohm's law (V=0.8, R=0.01) and solve for I

[tex]V=IR\\0.8=I(0.01)[/tex]

Divide both sides by  0.01 to isolate I

[tex]0.8=I(0.01)\\\frac{0.8}{0.01}= \frac{I(0.01)}{0.01} \\80=I[/tex]

Therefore, the current for this circuit would be 80 A.

I hope this helps!

Answer:

Nothing

Explain

Nothing happenes when you take off your cloths quickly.

Scientificly nothing really happnes.

Answer:

speed in vacuum

Explanation:

lets say we are in an empty universe and you are moving 10% the speed of light you wont slow down or speed up.

Answer:

There are 5 general layers; organism, population, community, ecosystem, and biosphere.

Explanation:

Hope this helps!

Answer:

No

Explanation:

Recall that the hierarchy of wavelength color from minimum wavelength to maximum wavelength is:

[tex]V < I < B < G < Y < O < R;[/tex] and

[tex]E \ \alpha \ \dfrac{1}{\lambda}[/tex]

As a result, blue light has a higher energy level than green and red light.

As a result, the surface glows due to the blue LED. The green LED, on the other hand, would not allow the surface to glow as much as the red LED, which has a lower energy level when compared to the green light. As a result, the red LED would not allow the surface to glow as well.

Answer:

[tex]0.0084575\ \text{T}[/tex]

[tex]0.272\ \text{m}[/tex]

2.2 cm easily observable

Explanation:

[tex]m_1[/tex] = Mass of 12 C = [tex]1.99\times 10^{-26}\ \text{kg}[/tex]

[tex]m_2[/tex] = Mass of 13 C = [tex]2.16\times 10^{-26}\ \text{kg}[/tex]

[tex]r_1[/tex] = Radius of 12 C = [tex]\dfrac{25}{2}=12.5\ \text{cm}[/tex]

B = Magnetic field

v = Velocity of atom = 8.5 km/s

[tex]r_2[/tex] = Radius of 13 C

The force balance of the system is

[tex]qvB=\dfrac{m_1v^2}{r}\\\Rightarrow B=\dfrac{m_1v}{rq}\\\Rightarrow B=\dfrac{1.99\times 10^{-26}\times 8500}{12.5\times 10^{-2}\times 1.6\times 10^{-19}}\\\Rightarrow B=0.0084575\ \text{T}[/tex]

The required magnetic field is [tex]0.0084575\ \text{T}[/tex]

Radius is given by

[tex]r=\dfrac{mv}{qB}[/tex]

[tex]r\propto m[/tex]

So

[tex]\dfrac{r_2}{r_1}=\dfrac{m_2}{m_1}\\\Rightarrow r_2=\dfrac{m_2}{m_1}r_1\\\Rightarrow r_2=\dfrac{2.16\times 10^{-26}}{1.99\times 10^{-26}}\times 12.5\times 10^{-2}\\\Rightarrow r_2=0.136\ \text{m}[/tex]

The required diameter is [tex]2\times 0.136=0.272\ \text{m}[/tex]

Separation is given by

[tex]2(r_2-r_1)=2(0.136-0.125)=0.022\ \text{m}[/tex]

The distance of separation is 2.2 cm which is easily observable.

Answer:

Explanation:

wavespeed = wavelength * frequency

wavespeed / wavelength = frequency

343 / 17 = 20.17 Hz

343 / 0.017 = 201764 Hz

So range of frequencies we can hear is between 20Hz and 20,000 Hz ( or 20.17 to 201764 if you dont round up/down)

Answer:

the answer is B

Answer: [tex]0.0353\ s^{-1}[/tex]

Explanation:

Given

Radioactive material is found to decrease 40% of its original value in [tex]2.59\times 10\ s[/tex]

Sample at any time is given by

[tex]N=N_oe^{-\lambda t}[/tex]

where, [tex]\lambda=\text{decay constant}[/tex]

Put values

[tex]\Rightarrow 0.4N_o=N_oe^{-\lambda\cdot 2.59\times 10}\\\Rightarrow 0.4=e^{-\lambda\cdot 2.59\times 10[/tex]

Taking natural logarithm both side

[tex]\Rightarrow \lambda=\dfrac{\ln 2.5}{25.9}\\\\\Rightarrow \lambda =0.0353\ s^{-1}[/tex]

Answer:

the Earth's crust is broken into about 12 plates that float on hotter, softer rocks in the underlying mantle

Explanation:

Answer:The three main types are reflecting telescopes, refracting telescopes, and catadioptric telescopes. Radio telescopes collect and focus radio waves from distant objects. Space telescopes orbit Earth, collecting wavelengths of light that are normally blocked by the atmosphere.

Answer:

oii me manda mensagem fofo vc tem namorada fofo

Answer:

1. sleep well

2. drink water

3. eat healthy

4. less sugar and salt

5. exercise 30 minutes daily

6. eat whole grains

7. eat fruits and vegetables

8. practice mental health

9. stay motivated

10. eat a variety of foods

Answer:

https://www.ux1.eiu.edu/~cfadd/1350/Hmwk/Ch08/Ch8.html

Explanation:

Using ohm's law and the characteristics of series and parallel circuits, we find that the correct answer is B: Voltage on the voltmeter 1.5 V

given parameters

    * The element X has a resistance Rₓ = R

    * Element Y with resistance R_y = R / 2

     * The voltmeter with internal resistance R_v = R

    * Battery voltage V = 6V

    * the circuit is in the diagram

To find

     The Voltmeter reading.

For this exercise we use ohm's law which establishes a linear relationship between voltage and current

      V = i R

Let's solve the circuit in parts:

1 part.  We reduce the part in parallel, finding its equivalent resistance

            R_ {eq1}

The equivalent resistance between Y element and the voltmeter that is in parallel, therefore their equivalent resistance is

         [tex]\frac{1}{R_{eq1} } = \frac{1}{R_y} + \frac{1}{R_v}[/tex]

         [tex]\frac{1}{R_{eq1} }= \frac{1}{\frac{R}{2} } + \frac{1}{R} = \frac{3}{R}[/tex]

         [tex]R_{eq1} = \frac{R}{3}[/tex]

Now element X and this equivalent resistance are in series ( see attached), so the equivalent resistance of the entire circuit is

        R_{eq} = Rₓ + R_{eq1}

we substitute

       R_{eq} = [tex]R + \frac{R}{3} = \frac{4}{3} \ R[/tex]

2 part. We look for the current of the circuit, usin the ohm's Law

        V = i R_{eq}

        i = [tex]\frac{V}{R_{eq} }[/tex]

        i = [tex]\frac{6}{\frac{4R}{3} } = \frac{18}{4R}[/tex]

        i = 4.5 / R

In a series circuit the current is constant and the total voltage is the sum voltage of each element, so the voltage in the parallel R_{eq1}

        V₂ = I R_{eq1}

        V₂ = [tex]\frac{4.5}{R} \ \frac{R}{3}[/tex]4.5 / R R / 3

        V₂ = 1.5 V

3 part. The voltmeter and the Y element  are in parallel, so the voltage in the two elects is the same,  consequently the voltage of the voltmeter (V_v)

          V_v = V₂ = 1.5 V

Using ohm's law and the properties of series and parellel circuits we find the voltage across the voltmeter

           V_v = 1.5 V

To learn about series and parallel circuits here:  brainly.com/question/11409042

Answer:

λ = 1.86 x 10⁻⁴ m = 186 μm

Explanation:

The relationship between the wavelength and the frequency of a wave is given by the following equation:

[tex]c = f\lambda\\\\\lambda = \frac{c}{f}[/tex]

where,

λ = wavelength of infrared radiation = ?

c = speed of infrared radiation = speed of light = 3 x 10⁸ m/s

f = frequency of infrared radiation = 1.61 THz = 1.61 x 10¹² Hz

Therefore,

[tex]\lambda = \frac{3\ x\ 10^8\ m/s}{1.61\ x\ 10^{12}\ Hz}[/tex]

λ = 1.86 x 10⁻⁴ m = 186 μm

Answer:

[tex]B_{int}=-0.015T[/tex]

Explanation:

From the question we are told that:

RF source oscillation speed [tex]\sigma= 34 MHz[/tex]

The external field [tex]Bext =0.78 T[/tex].

Pro- ton magnetic moment component [tex]\mu=1.41 X 10-26 J/T[/tex]

Generally the equation for magnitude of [tex]B_{int}[/tex] is mathematically given by

[tex]B_{int}=B_{ext}-\frac{h\triangle \sigma}{2 \mu}[/tex]

[tex]B_{int}=0.78-\frac{6.6*10^{-34}*34*10^6}{2*1.41*10^{26}}[/tex]

[tex]B_{int}=0.78-0.7957[/tex]

[tex]B_{int}=-0.015T[/tex]

Answer:

0.5 m/s 2 is the acceleration

Explanation:

hope it helped!!!

The nonmechanical energy or the loss of energy after the collision will be equal to  [tex]E=6\ J[/tex]

The conservation of the momentum is defined as when two bodies collide with each other then the total energy of the masses will remain constant.

It is given in the question that

Mass of the body X is  [tex]M_X=4\ kg[/tex]

The velocity of the body X is  =[tex]V_x=3 \ \frac{m}{s}[/tex]

Mass of the body Y is   [tex]M_Y= 2\ kg[/tex]

The velocity of body Y is [tex]V_y= 0[/tex]

Now to find out the energy converted after the collision we will first find the final velocity of both the bodies.

Now from the conservation of the momentum

[tex]M_X V_X +M_YV_Y=(M_X+M_Y)V_F[/tex]

[tex](4\times 3)+(2\times0)=(4+2)\times V_F[/tex]

[tex]V_F= \dfrac{12}{6}[/tex]

[tex]V_F = 2 \frac{m}{s}[/tex]

Now to find the Change in the energy of the body

[tex]\Delta E=E_i-E_f[/tex]

[tex]\Delta E=\dfrac{1}{2} M_XV_X^2+\dfrac{1}{2} M_YV_Y^2-\dfrac{1}{2} (M_X+M_Y)V_F^2[/tex]

[tex]\Delta E=\dfrac{1}{2} (4)(3^2)+\dfrac{1}{2} (2)(0^2)-\dfrac{1}{2} ( 4+2) 2^2[/tex]

[tex]\Delta E= 6\ J[/tex]

Thus the nonmechanical energy or the loss of energy after the collision will be equal to  [tex]E=6\ J[/tex]

To know more about the collision follow

https://brainly.com/question/7694106

Answer:

The thickness of the oil slick. t = 173.91 nm

Explanation:

Oil film thickness t is given by the equation

[tex]t = \frac{\lambda}{2n}[/tex]

where λ = wavelength of incident light in air = 400 nm

and n = index of refraction of oil

therefore,

[tex]t =\frac{400}{2\times 1.15}\\t= 173.91 nm[/tex]

The thickness of the oil slick. t = 173.91 nm

Answer:

- the forces on the left hand side is 1.038 kN

- the forces on the right hand side is 1.483 kN

Explanation:

Given the data in the question, as illustrated in the image below;

Length of the scaffold = 3 m

weight of the scaffold = 395 N

Weight of Bob = 805 N and stands 1 m from the left end

weight of washing equipment = 500N and on sits 2 m from the left end

Weight of Joe = 820 N and stand 0.500 m from the right end

so the force on the left cable will be;

[tex]T_{left[/tex] = [tex]\frac{1}{3m}[/tex][ (805 N)( (3-1) m) + ( 395 N )( [tex]\frac{3}{2} m[/tex]) + ( 500 N )(1m ) + ( 820 N)( 0.500m ) ]

[tex]T_{left[/tex] =  [tex]\frac{1}{3m}[/tex][ 1610 + 592.5 + 500 + 410 ]

[tex]T_{left[/tex] =  [tex]\frac{1}{3m}[/tex][ 3112.5 ]

[tex]T_{left[/tex] =  1037.5 N

[tex]T_{left[/tex] =  1.038 kN

Therefore, the forces on the left hand side is 1.038 kN

On the right hand side;

[tex]T_{Right[/tex] =  ( 805 N + 395 N + 500 N + 820 N ) - 1037.5 N

[tex]T_{Right[/tex] =  2520 N - 1037.5 N

[tex]T_{Right[/tex] =  1482.5 N

[tex]T_{Right[/tex] =  1.483 kN

Therefore, the forces on the right hand side is 1.483 kN

It's easier for you to solve these than to try and read my solutions if I solve them.

Use this magic formula:

(period) · (frequency)  =  1

If you handle the magic formula carefully and correctly, you can get these facts out of it:

--  Period =  1 / frequency

-- Frequency =  1 / period

Use the first one to solve #1.

Use the second one to solve #2.

Answer:

[tex]T=8\times 10^{-19}\ s[/tex]

Explanation:

Given that,

The frequency of x-ray is, [tex]f=1.25\times 10^{18}\ Hz[/tex]

We need to find the time period of these x-rays. Let it is be T. We know that, the relation between f and T is given by :

T = 1/f

So,

[tex]T=\dfrac{1}{1.25\times 10^{18}}\\\\=8\times 10^{-19}\ s[/tex]

So, the time period of these x-rays is equal to [tex]8\times 10^{-19}\ s[/tex].

The time period of the electromagnetic wave is 8.0 × 10⁻¹⁹ seconds.

Given the data in the question;

Frequency; [tex]f =1.25 * 10^{18}Hz[/tex]

Time period; [tex]T =\ ?[/tex]

Time period is simply the time taken for one complete cycle of vibration to pass a given point.

It is expressed as:

[tex]T = \frac{1}{f}[/tex]

We substitute our value into the equation

[tex]T = \frac{1}{1.25 * 10^{18}Hz} \\\\T = \frac{1}{1.25 * 10^{18}s^{-1}}\\\\T = 8.0 * 10^{-19}s[/tex]

Therefore, the time period of the electromagnetic wave is 8.0 × 10⁻¹⁹ seconds.

Learn more: https://brainly.com/question/24094163

Answer:

C) 26.6

Explanation:

I don't know how to calculate vector

The angle between the two vectors is 117⁰

The given parameters;

vector A = 3.00i + 1.00j

vector B = -3.00i + 3.00j

The  angle between the two vectors is calculated as follows;

[tex]cos \ \theta = \frac{A\ . \ B}{|A| \ . \ |B|}[/tex]

The dot product of vector A and B is calculated as;

[tex]A \ . \ B = (3i \ + j) \ . \ (-3i \ + 3j) = (3\times -3) + (1 \times 3) = -9 + 3 =- 6[/tex]

The magnitude of vector A and B is calculated as;

[tex]|A| = \sqrt{3^2 + 1^2} = \sqrt{10} \\\\|B| = \sqrt{(-3)^2 + (3)^2} = \sqrt{18}[/tex]

The  angle between the two vectors is calculated as;

[tex]cos \ \theta = \frac{-6}{\sqrt{10} \ . \sqrt{18} } \\\\cos \ \theta = \frac{-6}{\sqrt{180} } \\\\cos \ \theta = -0.4472\\\\\theta = cos \ ^{-1} (-0.4472) \\\\\theta = 116.6^0 \approx 117^0[/tex]

Thus, the angle between the two vectors is 117⁰

Learn more here: https://brainly.com/question/15006306