What is current of 12 ohm? help me pleasee​

Answer:

Q = N e     where N e is the number of electrons required to produce charge Q

N = Q / e = 3.5E6 C / 1.6E-19C = 2.2E25   = 2.2 X 10^25    electrons

Answer:

3.5 million C

Explanation:

This exercise is about Reflection and Mirrors. It explores the relationship between convex mirrors, virtual images, and complex images as well as to object distance d₀.

Any d₀ value greater than 10 for a convex lens will produce a true or real image, while any d₀ value greater than 15 for a complex mirror will produce a real image.

Any d₀ number less than 10 for a convex lens will result in a virtual image. Also, any d₀ value less than 15 for a complex mirror will result in a virtual picture.

The range of d₀ values that would result in a reduced picture in both lenses and mirrors is:

d₀ > 2 f, where is the Focal length.

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Hello!

Recall for resistors in parallel:
[tex]\frac{1}{R_t} = \frac{1}{R_1} + \frac{1}{R_2} + ... + \frac{1}{R_n}[/tex]

We can begin by calculating the total resistance:
[tex]\frac{1}{R_t} = \frac{1}{10} + \frac{1}{10} + \frac{1}{10}}\\\\\frac{1}{R_t} = \frac{3}{10}\\\\R_t = \frac{10}{3} = \boxed{3.333 \Omega}[/tex]

Now, we can calculate the current using Ohm's Law:
[tex]V = iR\\\\i = \frac{V}{R}[/tex]

V = Voltage of battery (V)
i = Current (A)

R = Resistance (Ω)

Plug in the given voltage and the total resistance we solved for.

[tex]i = \frac{15}{3.33} = \boxed{4.5 A}[/tex]

In a circuit, if the resistors were decreased by a factor of 1,000, it is true that the current would increase by a factor of 1,000, according to Ohm's Law.

It is a law in electricity that posits that the voltage that goes through a conductor is directly proportional to the current.

One formula in Ohm's law is:

Voltage = Current x Resistance

If the resistance were to decrease by a factor of 1,000, the current would have to increase by a factor of 1,000 as well in order to give the same voltage.

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Answer:

(B) Probably - Pitch will appear to be lower than the source

Pitch differences occur because of relative motions between the source and observer - it does not depend on distance measurements

Answer:

(B) Probably - Pitch will appear to be lower than the source

Pitch differences occur because of relative motions between the source and observer - it does not depend on distance measurements

Explanation:

The electron energy does not depend on the focusing cylinder voltage because the magnetic field runs perpendicular to the electron's direction of movement.

A magnetic field is produced by moving negatively electric charges (electrons) which generate magnetic forces that are observable.

The negative electrons that orbit around atoms in a molecule generate small magnetic fields around such atoms.

According to Fleming's left-hand rule, the direction of a magnetic force acting on a current is perpendicular to the direction of the electric current and magnetic field.

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Because it exerts a force that's also parallel to the horizontal fields instead of in opposition to it, the final electron energy is unchanged by the focusing cylinder voltage.

An electron's energy is on the same scale (in the same range) as that of light. The lines in an element's spectrum represent changes in the energy of electrons within the element's atoms. Scientists have reached numerous conclusions regarding the behavior of electrons in atoms by studying these spectra.

Negative electrons orbiting around atoms in a molecule produce modest magnetic fields surrounding them.

The vector of a magnetic force that acts on a current is opposite to the axis of the electric current and magnetic fields, as per Fleming's left-hand rule.

Thus, because it exerts a force that's also parallel to the horizontal fields instead of in opposition to it, the final electron energy is unchanged by the focusing cylinder voltage.

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Distance = (speed) x (time)  <== This is important.  You should memorize it.

Distance = (30 km/hr) x (3 hr)

Distance = (30 x 3) (km/hr x hr)

Distance = 90 km

Answer:

Explanation:

w=F×S

F=mg

F =50×110

F=500N

S=0.1 m

W=500×0.1

W=50j

(a) The impulse on the puck is 1.323 kgm/s.

(b) The magnitude of the force that acted on the puck is 264.5 N.

The impulse on the puck is equal to the change in momentum of the puck.

The change in th momentum of the puck is calculated as follows;

ΔP = m(u - v)

where;

Magnitude of the final velocity

|v| = √[(-25)² + (5)²] = 25.5 m/s

ΔP = 0.115(37 - 25.5)

ΔP = 1.323 kgm/s

Thus, the impulse on the puck is 1.323 kgm/s.

The magnitude of the force that acted on the puck is calculated as follows;

F = ΔP/t

F = 1.323/0.005

F =264.5 N

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The magnitude of the centripetal acceleration of the bicycle wheel is 40 m/s².

The centripetal acceleration of the bicycle wheel is the inward or radial acceleration of the bicycle on the circular path.

The magnitude of the centripetal acceleration of the bicycle wheel is calculated as follows;

a = ω²r

where;

ω is angular speed

r is the radius of the circular path

a = (10)² x 0.4

a = 40 m/s²

Thus, the magnitude of the centripetal acceleration of the bicycle wheel is 40 m/s².

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The acceleration of a body travelling in a circular route is known as centripetal acceleration.  The centripetal acceleration of the wheel at this time point is 40 m/sec².

The acceleration of a body travelling in a circular route is known as centripetal acceleration. It is given by the formula,

[tex]a_c = \dfrac{v^2}{r} = \omega^2 r[/tex]

The centripetal acceleration of the wheel with angular velocity 10 rad/sec and velocity 40cm (0.4 m) can be written as,

[tex]a_c = \omega ^2\times r\\\\a_c = (10)^2\times 0.4\\\\a_c = 40\rm\ m/sec^2[/tex]

Hence, the centripetal acceleration of the wheel at this time point is 40 m/sec².

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Answer:

B. where tectonic plates meet

Explanation:

Most volcanoes occur near tectonic plate boundaries. For example, a large amount are found on the Ring of Firez connecting several plates.

Answer:

9.8 m/s2

Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2. When discussing the acceleration of gravity, it was mentioned that the value of g is dependent upon location.

Explanation:

H

Hydrogen

-259.14 -252.87 0.00008988 (gas, 273K)

2

He

Helium

-272.20 (under pressure) -268.934 0.0001785 (gas, 273K)

3

Li

Lithium

180.54 1347 0.534

4

Be

Beryllium

1278 2970 1.8477

5

B

Boron

2300 3658 2.34

6

C

Carbon

3527 4827

(sublimes) 2.260 (graphite)

3.513 (diamond)

7

N

Nitrogen

-209.86 -195.8 0.0012506 (gas, 273K)

8

O

Oxygen

-218.4 -182.96 0.001429 (gas, 273K)

9

F

Fluorine

-219.62 -188.14 0.001696 (gas, 273K)

10

Ne

Neon

-248.67 -246.05 0.00089994 (gas, 273K)

11

Na

Sodium

97.81 882.9 0.971

12

Mg

Magnesium

648.8 1090 1.738

13

Al

Aluminum

660.37 2467 2.698

14

Si

Silicon

1410 2355 2.329

15

P

Phosphorus

44.1 (white)

410 (red, under pressure) 280 (white) 1.82 (white)

16

S

Sulfur

113 (α)

119 (b)

106.8 (g) 444.67 2.070 (α)

1.957 (b)

17

Cl

Chlorine

-100.98 -33.97 0.003214 (gas, 273K)

18

Ar

Argon

-189.37 -185.86 0.001784 (gas, 273K)

19

K

Potassium

63.65 774 0.862

20

Ca

Calcium

839 1484 1.55

21

Sc

Scandium

1541 2831 2.989

22

Ti

Titanium

1660 3287 4.54

23

V

Vanadium

1887 3377 6.11 (292 K)

24

Cr

Chromium

1857 2672 7.19

25

Mn

Manganese

1244 1962 7.44

26

Fe

Iron

1535 2750 7.874

27

Co

Cobalt

1495 2870 8.90

28

Ni

Nickel

1453 2732 8.902 (298 K)

29

Cu

Copper

1083.4 2567 8.96

30

Zn

Zinc

419.58 907 7.133

31

Ga

Gallium

For a person dragging a packing crate of mass 100 kg, the angle above the horizontal  is mathematically given as

theta = 21.8 °

Generally, the equation for the Force   is mathematically given as

[tex]Fnet = F_{costheta} - F_{friction}[/tex]

Therefore

Fnet = Fcostheta - mu*((mg) - Fsintheta)

sin theta = mu*costheta

mu = tantheta

theta = tan^-1(mu)

theta = tan^-1(.400)

theta = 21.8 °

In conclusion, the angle above horizontal

theta = 21.8 °

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The centripetal force of the rock tied to a string and swung in a circular path is determined as 1.65 N.

The angular speed of the rock is calculated as follows;

ω = 2π N

[tex]\omega = 35^0 \times \frac{2 \pi \ rad}{360^0} \times \frac{100}{3\min} \times \frac{1 \min}{60 \ s} \\\\\omega = 0.339 \ rad/s[/tex]

The centripetal force of the rock is calculated from the product of mass and centripetal acceleration as shown below;

Fc = ma

Fc = m(ω²r)

Fc = mω²r

Fc = 8 x (0.339)² x 1.8

Fc = 1.65 N

Thus, the centripetal force of the rock tied to a string and swung in a circular path is determined as 1.65 N.

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the Army had a fight in unfamiliar territory but with the combination of disadvantages and a loss of public support what to the United States withdrawing from Vietnam

Explanation:

I hope this helps

Answer:

= -1515N

Explanation:

v^2=u^2+2as

0m/s

u=20.1m/s

0=(20.1)^2+(2xax200)

0=404.01+400a

-404.01=400a

-404.01÷400=a

a= -1.01m/s^s

its negative because the force is slowing down the car

Newton's second law of motion

F=ma

=1500×-1.01

F= -1515N

Answer:

ADD ALL THEM AND ANSER WILL BE THERE 19.O

Explanatio

1. Resistance is the opposition offered in a path of flow of current by the atoms or molecules of the conductor.

Factors on which resistance of a conductor depends are:

2. Rheostat is used to change the resistance without changing the voltage source in an electric circuit.

3.

Given :

[tex]\dashrightarrow l = 50 m[/tex]

[tex]\dashrightarrow A = 0.01 {mm}^{2} [/tex]

[tex]\dashrightarrow A = 0.01 \times {10}^{ - 6} \: {m}^{2} [/tex]

[tex]\dashrightarrow \rho = 5 \times {10}^{ - 8} \: \Omega \: m[/tex]

We know that,

[tex] \dashrightarrow R = \rho \dfrac{l}{A}[/tex]

[tex] \dashrightarrow R = 5 \times {10}^{ - 8} \bigg(\dfrac{50}{0.01 \times {10}^{ - 6} } \bigg)[/tex]

[tex] \dashrightarrow { \pink{ \underline{ R = 250 \: \Omega }}}[/tex]

The resistance of a conductor is the opposition to the flow of current and depends on the length and area of the material

Resistance is the opposition to the flow of current by the atoms or molecules of the conductor.

The factors on which resistance of a conductor depends are:

A Rheostat is the device used to change the resistance without changing the voltage source in an electric circuit.

The resistanceis given as:

Area = 0.01 square mm = 1.0 × 10^-8 square m

R = (50 × 5 ×10 ^-8 ohm m)/1.0 × 10^-8 square m

Resistance = 250 ohm

Therefore, resistance of a conductor is the opposition to the flow of current.

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Answer:

C. 10kg to 10kg

Explanation:

You have to picture to it I think

Answer:

C

Explanation:

true because c is the best answer

Answer: The answer is C. It is true because the two cities are at the same latitude.

Explanation:

Hi I was doing the same test are u in flvs lol I am too if you are!

For a mass m1 on the frictionless table, the speed m1 must rotate a with radius r if m2 is to remain hanging at rest is mathematically given as

[tex]v=\sqrt{m1/m2*xg}[/tex]

Generally, the equation for the Force  is mathematically given as

Fc=Fw

Therefore

[tex]\frac{m1v1}{x}=m2g[/tex]

[tex]v=\sqrt{m1/m2*xg}[/tex]

In conclusion,  if m2 is to remain hanging at rest the speed of ratio of m1 is calcuylated using

[tex]v=\sqrt{m1/m2*xg}[/tex]

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The value of the velocity for the mass m₁ on the frictionless table will be [tex]\rm v = \sqrt{\frac{m_1}{m_2 xg} }[/tex]. Velocity is a time-based component. Its unit is m/sec.

The change of distance with respect to time is defined as speed. Speed is a scalar quantity.

The given data in the problem is

m is the mass

g is the acceleration of free fall =10m/sec²

v is the velocity

From the balancing equation of force the centripetal force is equal to the weight;

[tex]\rm F_c= m_2 g \\\\ \rm \frac{m_1v_1^2}{x} = m_2 g \\\\ v= \sqrt{\frac{m_1}{m_2xg} } \\\\[/tex]

Hence the value of the velocity for the mass m₁ on the frictionless table will be [tex]\rm v = \sqrt{\frac{m_1}{m_2 xg} }[/tex].

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Scientific evidence such as reflection and photoelectric effect has proven the wave-particle model of electromagnetic radiation to be true.

Electromagnetic radiation is radiation produced as a result of the interactions of the electric and magnetic fields.

Some forms of electromagnetic radiation include:

Electromagnetic radiation can be described using a wave model or a particle model.

The wave property of electromagnetic radiation include:

The particle property of electromagnetic radiation include:

Therefore, the wave-particle model of electromagnetic radiation is correct because it can be backed up by experiments and evidence.

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Answer:

I just took the identifying Claims Quick check

Explanation:

1. Claim: Electromagnetic radiation can be described by a wave model or a particle model, depending on the situation.

Is this a scientific claim?

Yes, it can be backed up by experiments and evidence.

2. A student states, "The wave model is better than the particle model for electromagnetic radiation because it is easier to understand." Is the student's statement a scientific claim?

No, it isn't because the statement is an opinion.

3. A student wants to make a scientific explanation regarding the wave model of electromagnetic radiation. Which of the following would be part of the scientific explanation?

Claims

4. A student makes this statement before conducting an experiment on electromagnetic radiation: "We expect the laser to diffract when passed through a slit." Which of the following explains why the student's statement is not a claim?

It is a prediction or hypothesis.

5. Which claim do scientists use to describe electromagnetic radiation?

Electromagnetic radiation exhibits properties of both particles and waves.

6. A physician is going to use high-frequency electromagnetic radiation to treat cancer in a patient. Which is a claim about this event?

A wave model is most useful for describing the frequency of the radiation.

(a) The wavelength of the resonance created is 0.8 m.

(b) The speed of the sound in the fundamental mode is 400 m/s.

(c) The low value of speed of speed of sound in water calculated may be as a result of low temperature of the water poured into the cooking pot.

The wavelength of the resonance created is determined by assuming the cooking pot to be a closed pipe.

Wavelength of fundamental mode of a closed pile = 4L

where;

λ = 4 x 0.2 = 0.8 m

The speed of the sound in the fundamental mode is calculated as follows;

v = fλ

v = 500 x 0.8

v = 400 m/s

Sound wave is directly proportional to temperture, as the temperature of the water increases, the speed of sound increases as well.

The low value of speed of speed of sound in water calculated may be as a result of low temperature of the water poured into the cooking pot.

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Answer:

C

Explanation:

Alveoli are tiny functioning structures that compose your lungs. They help with respiration. They have a large total surface area, which is very useful for respiration. The more surface area there is, the more transactions can happen. Which means that breathing will be easier/faster when you have more alveoli. (Please rate this answer if you have time!)

Answer:

position

Explanation:

Okay, so this already exists

Colorblind people use the position of the light

Red on top, yellow in middle, green on bottom

Explanation:

|F|= B/2

B/2 = √(A²+B²+2ABcosθ) ------(1)

Since the resultant of A and B is perpendicular to Vector A

tan90°= BSinθ/(A+BCosθ)

(A+BCosθ)=0

Cosθ=-A/B ----(2)

Using equation (1)

B/2 = √(A²+B²+2ABcosθ)

B/2 = √(A²+B²+2AB×-A/B)

B/2=√(A²+B²-2A²)

B/2=√(B²-A²)

B²/4=B²-A²

A²=B²-B²/4

A²=3B²/4

A=√3B/2

Using equation (2)

Cosθ=-A/B

Cosθ=-[√3B/2]/B

Cosθ=-√3/2

θ= cos^-1 (-√3/2)

θ= 150°

Answer: 10 cm

Explanation:

[tex]$$The focal length is: \\ \\ \begin{aligned}f &=\frac{R}{2} \\&=-\frac{46}{2} \\f &=-20 \mathrm{~cm}\end{aligned}$$[/tex]

[tex]$$ Since the image is virtual: \\ \\ :\begin{aligned}\frac{v}{u} &=m \\\Rightarrow & v=m u \\\Rightarrow &v=2 u\end{aligned}$$[/tex]

[tex]$$ Using: \\ \\ \begin{aligned}&\frac{1}{l}=\frac{1}{v}+\frac{1}{u} \\&\frac{1}{20}=-\frac{1}{2 u}+\frac{1}{u} \\&\frac{1}{2 u}=\frac{1}{-20} \\&\Rightarrow u=-10 \\&\therefore u=10 \mathrm{~cm}\end{aligned}$$[/tex]

Therefore, you must be 10 cm away from the mirror so that your virtual image is twice the size of your actual face