A metal rod .76 m long moves with a speed of 2 m/s perpendicular to a magnetic field. If the induced emf between the ends of the rod is .45 V what is the strength of the magnetic field?

Answer:

34.55m/s

Explanation:

Now from Newton's law of motion;

V= U+ a×t

V- final velocity

U- initial velocity = 0m/s

a- acceleration

t- time

Note that a = g/cos53.2°

Now g is acceleration of free fall due to gravity

This is a vertical acceleration since the course of motion is along a plane inclined at 53.2° to the height of the pool.

Also from trigonometry identity

cos 53.2°= vertical component a/ acceleration ( cos a = adjacent/hypothenus)

If we assume g = 9.8m/S2 { a generally given value}

Substituting t = 3.45s as the time of consideration, we have;

V = 0 + (9.8/cos53.2°)×3.45

= -34.55m/s

Note the -ve sign is just telling us this velocity is causing the object to move down.

Hence V = 34.55m/s

Answer:

27.07 m/s

Explanation:

this is the right answer

Answer:

where is the number line? I'm not sure what I'm supposed to be looking at.

According to the given statement , the acceleration of the sphere at the instant when its speed is 27.0 m/s.

We can use the principles of electrostatics and kinematics.  a = [(9.00 x 10⁹ N * m² / C²) * |5.00 μC * 2.00 μC| / (0.08 m)²] / (4.00 x 10⁻³ kg).

1. Determine the electric force between the two charges:
  - The electric force between two charges can be calculated using Coulomb's Law:

F = k * |q1 * q2| / r².
  - In this case, q1 = 5.00 μC and q2 = +2.00 μC. The distance between them, r, is the horizontal distance of 8.00 cm (which is 0.08 m).
  - The constant k is 9.00 x 10⁹ N * m^2 / C².
  - Plugging in the values, we get F = (9.00 x 10^9 N * m² / C²) * |5.00 μC * 2.00 μC| / (0.08 m)².

2. Calculate the net force acting on the sphere:
  - At any instant, the net force acting on the sphere is the sum of the electric force and the force due to gravity.
  - However, in this case, gravity can be neglected, as stated in the question.
  - Therefore, the net force acting on the sphere is equal to the electric force between the two charges.

3. Calculate the mass of the sphere:
  - The mass of the sphere is given as 4.00 x 10⁻³ kg.

4. Apply Newton's second law:
  - Newton's second law states that the net force acting on an object is equal to the product of its mass and acceleration: Fnet = m * a.
  - In this case, the net force acting on the sphere is the electric force between the charges.
  - Plugging in the values, we get (9.00 x 10⁹ N * m^2 / C²) * |5.00 μC * 2.00 μC| / (0.08 m)² = (4.00 x 10⁻³ kg) * a.

5. Solve for the acceleration:
  - Rearranging the equation, we have a = [(9.00 x 10⁹ N * m² / C²) * |5.00 μC * 2.00 μC| / (0.08 m)²] / (4.00 x 10⁻³ kg).
  - Evaluating the expression, we find the value of acceleration.

By following these steps, you can find the acceleration of the sphere at the instant when its speed is 27.0 m/s.

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Given :

Actual mass , \(m_e=436.8\ g\) .

Three observations 460.9 g, 461.4 g, 459.0 g .

To Find :

The percent error of the student.

Solution :

Percent error is given by :

\(\%error=\sum \dfrac{|approx\ value -actual\ value |}{exact\ value}\times 100\\\\\%error=\dfrac{|460.9-436.8|+|461.4-436.8|+|459-436.8|}{436.8}\times 100\\\\\%error=\dfrac{70.9}{436.8}\times 100\\\\\%error=16.23\%\)

Therefore , the percent error of the student is 16.23 % .

Hence , this is the required solution .

Answer:

It has a mass of 5 kilograms

Explanation:

Kg is the unit of mass. So a 5kg object has a mass of 5kg. The weight you associate with it is only relevant on Earth (under its specific gravity)

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m= near point/ s.

s=4.28 cm ( the distance of the contract from the magnifying glasses)

Near point = 30cm

so m= 30/4.28= 7

Thus, far from the lens should you hold the print to see a final virtual image 30 cm from the lens (at the eye's near point) is 7

Answer:

The lower the level of resistivity, the more electrical conductivity a metal has. And since copper wire has a low level of resistivity, it's a fantastic electrical conductor. Copper is also an incredibly flexible material.

Answer:

Brick A has more energy because its weight is more, that means that the gravitational pull to the earth will be more if the brick will fall from 30 feet.

Answer:

Element

Explanation:

The Number 1 which is Ca is a calcium element that is taking part in the chemical combination.

An element is a substance made up of one kind of atom.

Calcium is an element belong to the alkali earth metals. These group of elements are found on the second group of the periodic table.

For a planar surface, the direction of dip is always perpendicular (90 degrees) to the direction of strike.

In geology, the strike and dip are measurements used to describe the orientation of a planar rock surface, such as a bedding plane or fault. The strike represents the horizontal direction of the line formed by the intersection of the rock surface with a horizontal plane. The dip, on the other hand, represents the angle of inclination of the rock surface from the horizontal plane. In a planar surface, the dip is always perpendicular to the strike. This means that if the strike is in a particular direction, the dip will be at a right angle (90 degrees) to that direction.

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Answer:

The chef can make 8 casseroles

Explanation:

Units Conversion

We need to recall 1 gallon = 16 US cups.

A casserole needs 1 cup of milk, and the chef has 0.5 gallons of milk. Those 0.5 gallons are equivalent to 0.5*16 = 8 cups, thus the chef can make 8 casseroles.

Answer:

ethylene

Explanation:

ethylene is a compound consist of two double bonded carbon atom and four hydrogen atoms at room temperature is a gas

Answer:

Ethylene

Explanation:

Because Ethylene is a simple molecule composed of two double-bonded carbon atoms and four hydrogen atoms. It's a gas at room temperature. Ethylene molecules can be chemically bonded, end to end, to form a polymer named polyethylene.

If the object in motion has some magnetic properties or contains a magnet, we can use another magnet to change its direction of motion by exerting a force on it through magnetic interaction. This principle is known as the Lorentz force.

Here's how we can set up the experiment:

Take a magnet and place it on a flat surface.

Take another magnet or the object with magnetic properties that is in motion.

Hold the magnet or the object in your hand and bring it close to the stationary magnet without touching it.

Move the magnet or the object towards the stationary magnet and observe its behavior.

If the magnet or the object has the same polarity as the stationary magnet, they will repel each other, and the motion of the object will be deflected in a direction away from the stationary magnet. If the magnet or the object has opposite polarity to the stationary magnet, they will attract each other, and the motion of the object will be deflected in a direction towards the stationary magnet.

Here's a diagram to help you visualize the setup:

                 N   S          N   S

       __________    __________

      |                       |  |                     |

      |   M1               |  |           M2     |

      |__________|  |__________|

              ( )                             ( )

               |                               |

        Motion              Stationary

        Object                 Magnet

In this diagram, M1 represents the motion object or magnet, and M2 represents the stationary magnet. The N and S represent the North and South poles of the magnets. The arrows indicate the direction of motion and the direction of the magnetic field.

As we move M1 towards M2, the magnetic interaction will exert a force on M1, causing it to change its direction of motion. The direction of deflection will depend on the polarity of the magnets.

Note: It's important to keep in mind that the magnetic force is only one of the many factors that can affect the motion of an object. Other factors such as friction, air resistance, and gravitational forces can also play a significant role.

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When they are anti-parallel to one another, the dipole has the highest electric potential energy.

Think about a dipole with charges q1 = +q and q2 = -q that is set up in the same uniform electric field as in the previous figure. There is a gap between the charges, and the electric field's strength is E.

As shown in the figure, the charges' respective forces are given as -qE and +qE.

Knowing that a dipole experiences a torque equal to, which can be expressed as  = p*E, when it is placed in a uniform electric field rather than a force,

Taking into account that the potential energy is located at the initial angle

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Answer:

i think it is Joules (J).

... any unit of energy.

A few good ones:

... Joules

... Calories

... Ergs

... Newton-meters

... Dyne-centimeters

A truck is traveling at speed of 15 m/s on a slippery road. It will travel a distance of 57.4 meters before finally stop.

Using the Newton's 2nd law of motion:

Fs = m . a

Where:

Fs = friction force

m = mass of the truck

a = acceleration

Fs = μ . N

    = μ . mg

Where:

μ = coefficient of kinetic friction the tires and the road = 0.2

N = normal force = m . g

Hence,

μ . mg = m . a

a = μ . g

  = 0.2 x 9.8 = 1.96 m/s²

Using the equation of motion for a decelerated motion:

v² = u² - 2as

Where:

v = final speed = 0 (since the truck finally stop)

u = initial speed

s = distance

Hence,

0 = 15² - 2 x 1.96 x s

s = 225 / 3.92 = 57.4

Hence, the truck will travel a distance of 57.4 meters before finally stop.

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We may utilise the formula f = I + t to find the solution to this issue. Here, f denotes the final angular velocity, I the beginning angular momentum, the angular acceleration, and t the time interval.

The starting angular velocity (i) is claimed to be 171 rad/s, while the end angular velocity (f) is provided as 9 rad/s or around 28.27 rad/s. The elapsed time (t) is 6.0 s. These numbers are substituted into the formula to produce the result: 9 = 171 + (6.0)When we simplify and solve for, we obtain the following: \(= (9 - 171) / 6.0 = -41/3 rad/s2\)As a result, the angular acceleration is equal to -41/3 rad/s2. The solution is E. –41/3. The wheel's initial angular velocity is 171 rad/s. Its angular velocity is 9 rad/s after 6.0 seconds. The following formula can be used to get the constant angular acceleration (): _final = _initial + _*where is the angular acceleration, _final is the final angular velocity, _initial is the initial angular velocity, and t is the time interval. Changing the formula such that When we plug in the data, we obtain the following when we solve for = \((_final - _initial) / tα = (9π - 171) / 6.0\)The computation is now: = \((28.27 - 171) / 6.0 -142.73 / 6.0 -23.79\) since 9 28.27. The solution closest to this number is E. -41/3, or around -23.67 rad/s.

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Answer:

too much :(

Explanation:

\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}

\overline{a} = average acceleration

v = final velocity

v_0 = starting velocity

t = elapsed time

Answer:

a = Δv⁄t.

Explanation:

The work done by the aluminum in 216 Joules.

The ratio of the increase in length to the original length for each degree increase in temperature is called the coefficient of linear expansion. The coefficient of linear thermal expansion describes the change in the length of a material as a function of temperature. A distinction is made between the average thermal coefficient of expansion and the physical coefficient of linear expansion.

calculation:-

Work done = msT2 -T1

= 8000000 g × 2 × 1/000000 ( 20- 10)

= 600

density = 2.7

work done per unit = 600/2.7

= 216 jolues

The volume expansion coefficient is three times the linear expansion coefficient. Heating an object changes its dimensions. It depends on your body type. Expansion can be done in length in which case it is called linear expansion. Heating a square wafer causes expansion in two planes lengthwise and widthwise. We call this range dilation.

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The temperature of the air is approximately 20.65°C.

v = 331.3 m/s * sqrt(T/273.15 K)

Using the formula for the speed of sound, we can calculate the temperature of the air:

v = f * λ

where f is the frequency and λ is the wavelength.

Substituting the given values, we get:

v = 781 Hz * 0.45 m = 351.45 m/s

351.45 m/s = 331.3 m/s * sqrt(T/273.15 K)

Squaring both sides and rearranging, we get:

T = (351.45^2 / 331.3^2) * 273.15 K = 293.8 K

Converting from Kelvin to Celsius, we get:

T = 293.8 K - 273.15 K = 20.65°C

In physics, wavelength is a term that refers to the distance between two consecutive points in a wave that is in phase with each other. It is usually denoted by the Greek letter lambda (λ). The wavelength of a wave is typically measured from crest to crest or from trough to trough.

Wavelength is an important concept in physics as it is related to the energy and frequency of a wave. In fact, the wavelength of a wave and its frequency are inversely proportional to each other, meaning that as the frequency of a wave increases, its wavelength decreases, and vice versa. This relationship is described by the equation λ = c/f, where c is the speed of light and f is the frequency of the wave.

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The velocity of the car before the brakes were pressed was approximately 17.995 m/s. This velocity is obtained by subtracting the product of the acceleration and time from the final velocity using the kinematic equation.

To determine the velocity of the car before the brakes were pressed, we can use the kinematic equation that relates initial velocity (Vi), final velocity (Vf), acceleration (a), and time (t):

Vf = Vi + at

In this case, the final velocity (Vf) is given as 3.5 m/s, the acceleration (a) is -6.5 m/s² (negative sign indicates deceleration), and the time (t) is 2.23 seconds. We need to find the initial velocity (Vi).

Rearranging the equation, we have:

Vi = Vf - at

Substituting the given values, we get:

Vi = 3.5 m/s - (-6.5 m/s² * 2.23 s)

  = 3.5 m/s + 14.495 m/s

  = 17.995 m/s

Therefore, the velocity of the car before the brakes were pressed was approximately 17.995 m/s.

It's important to note that the direction of the velocity would be west since the car was initially driving west along Steeles Avenue and experienced acceleration in the east direction. However, since the problem does not explicitly mention the direction, we focus on the magnitude of the velocity.

The negative sign of the acceleration indicates deceleration, and the direction of the velocity is west based on the initial direction of the car.

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Answer:

Acceleration at its most basic is the act of increasing your running speed. From a standing start (or blocks), you explode into action. If you’re already running, you pick up the pace. Acceleration continues until you can no longer increase your speed, at which point you achieve maximum velocity (top-end speed). Acceleration seems simple enough. The plus means your increasing speed, the k=minus means your decreasing in speed.

Explanation:

Answer:

The recurve bows

Explanation:Vote brainliest plz

Action-reaction pairs are forces that operate on separate objects in opposing directions and at identical magnitudes. Never do they affect the same thing. We learn that forces are interactions from Newton's third law.

When two bodies contact, they exert an equal and opposite force on one another in accordance with Newton's third rule of motion. Action-reaction forces are made up of these forces.

Think about how a baseball bat and a ball interact, for instance. The bat forces the ball to the right while the baseball forces the bat to the left. The action-reaction force pair is made up of these two forces acting on two separate objects together.

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Answer:

24.14 degrees.

Diffraction grating is a flat and smooth surface with several parallel and closely spaced grooves, which are of the same width, separated by a groove-to-groove distance known as the grating period or the ruling.

To calculate the angle of diffraction maxima?

The angle of diffraction maxima can be calculated by using the equation d sin θ=nλ where d is the distance between the slits of the diffraction grating, θ is the angle at which the bright fringe is formed, n is the order of the bright fringe and λ is the wavelength of the incident light.

Let’s substitute the given values in the above equation. d = 0.00167 mm=1.67 × 10^-6 mλ = 656.3 nm=656.3 × 10^-9 m For n=2, the angle at which the second maximum is transmitted isθ = sin^-1(nλ/d)=sin^-1(2 × 656.3 × 10^-9 m/1.67 × 10^-6 m)=24.14° (approx)Thus, the angle at which the second maximum is transmitted is 24.14 degrees.

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Explanation:

If you place an electrically charged hair comb near bits of paper, the paper bits may be attracted to or repelled from the comb, depending on the charge of the comb and the bits of paper.

When you comb your hair with a plastic comb, the comb can pick up electrons from your hair, which gives the comb a negative charge. This negative charge can attract positively charged objects, such as small bits of paper or dust, to the comb.

On the other hand, if the comb has a positive charge, it can repel positively charged objects and attract negatively charged objects. So if the bits of paper have a negative charge, they may be repelled by the positively charged comb.

In either case, the attraction or repulsion would be relatively weak because the charge on a hair comb is typically small. However, it can still be a fun experiment to try!

Answer:

-30N to the left

Explanation:

Step one:

Given data

the mass of the monkey is 50N

Step two:

Required is the net force acting on the monkey

Now to the right Bunny is applying 95N,

Deer pushes on Monkey Tom Lee

with a 75N the net force acting on the monkey to move it is

= 95-50-75= -30N to the left

the other user said: