Can you please answer theese two qeastion

The vertical magnetic field required to keep the rod moving at a constant speed is  IBd=[tex](u_{k} )[/tex]mg.

When describing the distribution of the magnetic force in the area surrounding and inside of a magnetic object, we use the metaphor of a magnetic field.

The most of us are somewhat familiar with common magnetic items and are aware that there may be forces present between them. We know that magnets have two poles, and that two magnets can be attracted (opposite poles) or repellent depending on how they are oriented (similar poles). We understand that this occurs in some area that surrounds a magnet. Described by the magnetic field, this area.

Mathematics uses a vector field to represent the magnetic field. An array of several vectors drawn on a grid can be used to directly plot this vector field.

Explanation:

Given mass of rod ,m

current carrying= I  

Separation between rails =d

The kinetic friction coefficient, uk

The force of magnetic field (F) is perp. to the magnetic field.

Let required magnetic field be B.

Now balancing forces in y-direction,

       N=mg

And. in x-direction,

       F=f

      IBd= [tex]u_{k}[/tex]N

      IBd=[tex](u_{k} )[/tex]mg

B=[tex]\frac{u_{k} mg}{Id}[/tex]

To learn more about magnetic field ,visit:

https://brainly.com/question/11514007

#SPJ4

Answer:

Black Flies, leeches and aquatic worms.

Explanation:

Black Flies, leeches and aquatic worms are the organisms that are tolerant to pollution and has the ability to survive in the polluted environment occur due to man-made waste. these organisms sometimes takes food from these pollutants and help in surviving these organisms. Without these tolerant organisms, those organisms which are not sensitive to these pollutants will die and removed from that polluted environment.

Answer:b

Explanation:

b

Answer:

It's Compleatly False

Explanation:

It would violate the first law of thermodynamics which states that energy cannot be created or destroyed, and these laws are not optional. Furthermore, A perpetual motion machine would have to produce work without energy input. The Second Law of Thermodynamics states that that an isolated system will move toward a state of disorder.

The approximate magnitude of the electric field at <0,2,0>m is 0.

Size alludes to the reviewing of the splendor of stars, the first being the most splendid. It has been moved to different issues since essentially the seventeenth hundred years. A size is the estimation or outright worth of an amount. A size is addressed by a positive genuine number. In Physics, greatness is characterized as the most extreme degree of size and the course of an article. Greatness is utilized as a typical calculate vector and scalar amounts. By definition, we realize that scalar amounts are those amounts that have size as it were.

Learn more about magnitude, refer:

https://brainly.com/question/17157624

#SPJ4

A person who unintentionally grabs the terminals of a 14-kV power supply while holding body resistance between his palms.

(A) What is the current flowing through the person's body if the power supply's internal resistance is?

(b) Where does his body's power go when it is dispersed?

(c) If the power supply's internal resistance is to be increased in order to make it safer, what internal resistance should it have for the maximum current in the aforementioned scenario to be 1.00 mA or less?

employing ohm's law

a) The equation V = IR, where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms

R = V / I = 1.50 V/ ( 2.05 /1000) A = 731.71 ohms

b) E = IR + Ir = (731.71 0.0036) Power = IV = v = = = 0.1107 W

Ohm's regulation states that the cutting-edge through a conductor between two factors is without delay proportional to the voltage across the two factors. Introducing the steady of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship:

The regulation became named after the German physicist Georg Ohm, who, in a treatise posted in 1827, described measurements of applied voltage and current thru easy electrical circuits containing various lengths of wire.

To learn more about ohm's law visit : https://brainly.com/question/15233790

#SPJ9

Since the plastic is not very thick, light rays can penetrate through when I hold my largest cardboard square between the light source and the wall. As a result, the cardboard tends to cast a shadow.

Based on the precise materials and light sources that were employed, the results of the cardboard experiment frequently differ.

Keep in mind that it is generally expected that reflective materials, such aluminum foil and mirrors, would reflect the specified or given light.

Since the plastic is not very thick, light rays do penetrate when I hold my largest cardboard square between the light source and the wall. As a result, the cardboard tends to cast a shadow when held in this position.

To learn more about light:

https://brainly.com/question/15200315

#SPj4

Answer:

Newton's law of gravitation states that every object in this universe attracts every other object with a force called gravity,

when the distance between the two object is increased the gravitational force decreases by its square,

and when the mass an object increases the gravitational force also increases,

therefore, gravitational force is directly proportional to the mass of the two objects and is square inversely proportional to distance between them.

Hope it helped u,

pls mark as the brainliest and put thanks

^_^

Answer:

Radiation

Explanation:

bc Radiation transfers heat through electromagnetic waves.

The one who waits for a shorter time wins. Neha leaves her pendulum from point L and Suhani leaves her pendulum from point P.Neha wins as her bob comes back faster. Therefore, option A is correct.

A weight suspended from a pivot such that it can freely swing is called a pendulum. Gravity's restoring force will cause a pendulum to accelerate back toward its equilibrium position if it is sideways moved from its resting, equilibrium position.

An object that is suspended from a fixed location by a string or rod and can move freely due to gravity and momentum. frequently used to control electronics like clocks. Simple pendulum: A back-and-forth swinging pendulum. A circularly swinging pendulum is referred to as a spherical pendulum.

The force of gravity acting on the swing causes it to move freely back and forth after being raised and released. The swing keeps returning.

Thus, option A is correct.

To learn more about pendulum, follow the link;

https://brainly.com/question/14759840

#SPJ2

1. The phone is moving with a velocity of 20.77 m/s before racking into pieces

2. The time taken for the ball to come back to their hand is 0.82 s

3. The maximum height reached by the batarang is 49.03 m

4. The cliff is 1016.06 m high

5. The object is moving with a velocity of –8.6 m/s after 2 s

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 22)

v² = 431.2

Take the square root of both side

v = √431.2

v = 20.77 m/s

We'll begin obtaining the time taken to reach the maximum height. This is illustrated below:

v = u – gt (since the ball is going against gravity)

0 = 4 – (9.8 × t)

0 = 4 – 9.8t

Collect like terms

0 – 4 = –9.8t

–4 = –9.8t

Divide both side by –9.8

t = –4 / –9.8

t = 0.41 s

Finally, we shall determine the time for the entire trip

T = 2t

T = 2 × 0.41

T = 0.82 s

v² = u² – 2gh (since the ball is going against gravity)

0² = 31² – (2 × 9.8 × h)

0 = 961 – 19.6h

Collect like terms

0 – 961 = –19.6h

–961 = –19.6h

Divide both side by –19.6

h = –961 / –19.6

h = 49.03 m

h = ½gt²

h = ½ × 9.8 × 14.4²

h = 4.9 × 207.36

h = 1016.06 m

v = u – gt (since the ball is going against gravity)

v = 11 – (9.8 × 2)

v = 11 – 19.6

v = –8.6 m/s

Learn more about motion under gravity:

https://brainly.com/question/20385439

#SPJ1

The acceleration of a car that starts from rest and accelerates to a speed of 30 m/s in 20 seconds is 1.5 m/s².

Acceleration is defined as the change in velocity of a body or an object with time.

Mathematically;

The acceleration of the car is calculated using the equation of motion as follows:

v = u + a * t

where;

v is the final velocity

u is the initial velocity

t is the time taken

a is the acceleration

From the dat provided: v = 30 m/s, t = 20 s, u = O m/s

a = v - u/t

a = 30 - 0/20

a = 1.5 m/s²

Therefore, the acceleration of the car that starts from rest and accelerates to a speed of 30 m/s in 20 seconds, is 1.5 m/s².

Learn more about acceleration at: https://brainly.com/question/605631

#SPJ1

Answer:

D and C

Explanation:

C. The bulbs will stay on when one bulb breaks or burns out.

D. You will always know when there is a break in the circuit.

BENEFITS of a SERIES circuit:

Therefore, option C and D are correct.

Learn more:

brainly.com/question/11798838

Here the sound intensity in the bar is 4.73×10⁹ W/m².

The power carried by sound waves per unit area in a direction perpendicular to that region is known as sound intensity or acoustic intensity. The watt per square meter (W/m²) is the SI unit of intensity, which also covers sound intensity. One use for this technology is to measure the amount of sound energy present in the air near a listener.

According to the question:

The sound intensity in the bar, I = 1/2 ρω²s²v

I = 1/2 (8.92×10³)(2π×500)²(4.63×10⁻³)²(5010)

I = 4.73×10⁹ W/m².

Hence, the sound intensity in the bar is 4.73×10⁹ W/m².

To know more about sound intensity, visit:

https://brainly.com/question/15089336

#SPJ4

Answer:

Answer: B. 12 N

Explanation:

Static Equilibrium

Static equilibrium occurs when an object is at rest, i.e., neither rotating nor translating.

In the static rotational equilibrium, the total torque is zero with respect to any rotational axis.

The torque applied by a force F perpendicular to a displacement X with respect to a reference rotating point is:

T = F*X

Considering the pivot as the rotating point, there are 3 forces producing torque. Let's consider counterclockwise torques as positive, thus:

30N * 40 cm - 60 N * 30 cm + F (30 cm + 20 cm) = 0

Operating:

1200 N.cm - 1800 N.cm + F(50 cm) = 0

- 600 N.cm + F(50 cm) = 0

Solving for F:

F = 600/50

F = 12 N

Answer: B. 12 N

Answer:

Heat

Explanation:

Answer:

Heat conduction, also called diffusion, is the direct microscopic exchange of kinetic energy of particles through the boundary between two systems.

Explanation:

The value of [tex]V_{H}[/tex] is[tex](1.00\times10^{-4} V/T)B[/tex].

What is a magnetic field?

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. A magnetic field that varies with location will also exert a force on a variety of non-magnetic materials by changing the velocity of those particles' outer electrons. Electric currents, like those utilized in electromagnets, and electric fields that change in time produce magnetic fields that surround magnetized things. Since a magnetic field's position can affect both its strength and its direction.

By using the trend line option in excel, we get

[tex]\Delta V_{H} (in\mu V) = 100B[/tex]

[tex]\Delta V_{H} (V)= (\frac{100} {10^{-6} } V/T)B[/tex]

=[tex](1.00\times10^{-4} V/T)B[/tex]

To learn more about the magnetic field, visit:

https://brainly.com/question/24761394

#SPJ4

Answer:

[tex]{ \rm{A .B = |A| |B| \sin( \theta) }} \\ { \rm{A.B = 5 \times 7 \times \sin(45) }} \\ { \rm{A.B = 35 \times \frac{1}{ \sqrt{2} } }} \\ \\ { \rm{A.B = \frac{35}{ \sqrt{2} } }}[/tex]

rationalise the denominator;

[tex]{ \rm{A.B = \frac{35}{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } }} \\ \\ { \rm{A.B = \frac{35 \sqrt{2} }{2} }}[/tex]

Explanation:

When there is a constant unbalanced force applied in the same direction as the motion, speed will increase and acceleration will remain constant. When there is an increasing unbalanced force applied in the same direction as the motion, speed will increase and acceleration will increase.

According to newton's 2nd law

F = ma

F ∝ a

meaning when F increases , a increases and vice versa

Answer: decibels

Explanation:

Answer:

Explanation:

Hi! It would be A. Plane mirrors produce only virtual images,and concave mirrors produce real and virtual images.

Plane mirrors construct only virtual images, and concave mirrors make real and virtual images. Thus, this statement best corresponds concave and plane mirrors.

A virtual image exists represented as the opposite of a real image, thus an image that cannot be obtained on a screen stands produced as a virtual image. The motivation for this exists in the fact that the beams of light that form a virtual image never connect therefore a virtual picture can never be projected onto a screen. Examples: Image formed in a plane mirror, an image constructed on the front and back surfaces of a spoon, etc.

Therefore, the (A) option exists as the accurate answer.

To learn more about the virtual image, refer here :

https://brainly.com/question/9861899

#SPJ2

Answer:

false

Explanation:

Answer:

4 meters............

.

.

.

.

.

Answer: rats and mice

Explanation: because they are small and easy and more ethical

Answer:

B. Rats and mice

Explanation:

They use rodents more as a test subject, so the answer would be B. Rats and Mice.

I hope it helps! Have a great day!

R₁ = 28. 535 v  and  R₂  10.125 Ω  are the resistance are wired in series with a battery.

Let  R₁  and R₂ be the  two Resistance

resistance - which resists the flow of current.

R₁ - Resistance of 1st resistor

R₂ - Resistance of 2nd resistor

V = Voltage = 12V

I = O.31A ( in series)

I  = 1.6 A ( in parallel)

when two resistance connected in series then

Rs = R₁ + R₂

V = IRs = 12 /0.31 V

R₁+R₂ = 38.700Ω   (equation1.)

When two resistance connected in parallel then the value of R is.

    [tex]R_{p} =\frac { R_{1} R_{2}}{R_{1} + R_{2} }[/tex]

V = I Rp

V=  I (R₂ R₁ /R₁ +R₂)

R₁ R₂ = 290.25 Ω  

As we know

(R₁ - R₂ ) ² = (R₁ + R₂ ) ² - 4R1R2

Using above values we get,

 (R₁ - R₂ ) ²  = (38.70) ²  - 4x 290.25

 (R₁ - R₂ ) ²   = 336.69  Ω  

R₁ - R₂ = 18.34     (equation 2 )

Using equation 1 and 2 we get

R₁+ R₂ = 38.70 52

R₁ - R₂ = 18.34

R₁ = 28.535 Ω  

Using the value of  R₁ in equation 1 we get

R₂ = 38·700 -  28.535

R₂ = 10.125 Ω  

R₁ = 28. 535 v  and  R₂  10.125 Ω  are the resistors are wired in series with a battery.

To know more about resistance in series and parallel:

https://brainly.com/question/27882579

#SPJ4

Answer:

can you put it in a sentence

A copper wire that is 1 mm thick and 30 cm long is connected to a 1 v battery. (the resistivity of copper is 1.69 x 10-8 ω⋅m). The power is 154.82 W.

As we know the formula of Power:

P = V²/R ......(i)

Where,

P = power dissipated, V = voltage R = resistance

Now,

R = Lρ/A .....(ii)

Where,

L = length of the wire, A = cross-sectional area,  ρ = resistivity of the wire.

From eq (i) and eq(ii),

P = V²/(Lρ/A)

P = AV²/Lρ........ (iiI)

Here,

A = πd²/4, Where d = 1 mm

A = (3.14×0.001²/4) = 7.85×10⁻⁷ m²

Putting the value of A and the given values from the question in equation (iii).

P = (7.85×10⁻⁷×1²)/(0.3×1.69 x 10⁻⁸)

P = 154.82 W

If you need to learn more about questions related to wires, click here

https://brainly.com/question/27548725?referrer=searchResults

#SPJ4