A magnetic field is oriented at an angle of 40^\circto the normal of arectangular area 5.4{\rm cm}by 7.8{\rm cm}.- If the magnetic flux through this surface has a magnitude of4.7×10−5{\rm{T}} \cdot {\rm{m}}^2, what isthe strength of the magnetic field?Express your answer using two significant figures.B= mT

Answer:

Mars is an opportunity for humans to carry forward the light of consciousness, plus it is the closest planet like earth, it has land humans can land on and although its small, theres still water

The student should avoid using yellow light if they want to measure activity at different wavelengths.

Yellow light should not be used since it lacks the pigment necessary to absorb wavelengths between 550 and 580 that will cause it to be completely ineffective.

Color  Wavelength (nm)

Red         650 - 800

Orange   590 - 640

Yellow    550 - 580

Blue       460 - 480

Indigo    440 - 450

Violet     390 - 430

In physics, a periodic wave's wavelength is the length over which its form repeats. It is a characteristic of other spatial wave patterns as well as traveling and standing waves.

It is the separation between two consecutive positions on a wave that correspond to the same phase, such as two close-by crests, troughs, or zero crossings. The reciprocal of wavelength is the spatial frequency. Wavelength is usually denoted by the Greek letter lambda ().

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When two vectors have the same direction, they can be added and the direction of the resultant is the same as the direction of the vectors. Additionally, the magnitude of the resultant is simply the sum of the corresponding magnitudes of the vectors.

Therefore, the answer is:

1) The resultant is the sum of the two displacements having the same direction as the original vectors.

The form of heat transfer that doesn't depend on a medium is (B) radiation.

Radiation is the form of heat transfer that doesn't require a medium. It involves the emission of electromagnetic waves, such as infrared radiation, from a warm object to its surroundings.

Unlike conduction and convection, which require a medium (such as a solid, liquid, or gas) to transfer heat, radiation can occur in a vacuum or through empty space. This is because electromagnetic waves can travel through the vacuum without the need for a physical medium.

Conduction involves the transfer of heat through direct contact between objects or particles within a substance, while convection involves the transfer of heat through the movement of a fluid (liquid or gas).

Both conduction and convection require a medium for heat transfer, unlike radiation, which can occur independently of a medium.

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Answer:

To accurately respond to stimuli, the brain relies on information communicated by sensory neurons. Sensory neurons detect inputs from the environment, convert them into signals (electrical impulses), and pass the information on to the brain and spinal cord, where a response can be generated.

Explanation:

The Sun has a complex magnetic field that is generated by the movement of charged particles in its outer layers, known as the convection zone. The Sun's magnetic field is dynamic and can undergo significant changes over time, with its behavior being influenced by the solar cycle.

The solar cycle is a period of approximately 11 years during which the Sun's magnetic field undergoes a complete reversal. At the beginning of the solar cycle, the magnetic field is weak and has a simple structure with a single polarity. As the cycle progresses, the magnetic field becomes more complex and stronger, with the appearance of sunspots and other features indicating the presence of magnetic activity.

During this period, the magnetic field lines become twisted and stretched, forming loops and arches that can extend far above the Sun's surface. These structures can become unstable and release energy in the form of solar flares and coronal mass ejections, which can have a significant impact on the Earth's environment and technology.

After the peak of the solar cycle, the magnetic field begins to weaken and become less complex, eventually returning to a simple, single-polarity configuration at the start of the next cycle.

Overall, the Sun's magnetic field is a complex and dynamic system that undergoes significant changes over time, with its behavior being driven by the movement of charged particles in the convection zone and influenced by the solar cycle.

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Answer:

Mix

Explanation:

A battery has two electrodes, at one end it has the anode and the other end has the cathode. Electrons travel through the circuit from the anode (negative) to the cathode (positive), and this is the driving force that provides electricity to flow through circuits.

The anode needs to have a low electron affinity because it needs to readily release electrons, and the cathode needs to have a high electron affinity because it needs to readily accept electrons.

Answer:

Preoperational

Explanation:

According to Piaget's theory of cognitive development, the preoperational stage is the second stage. This stage includes children between the age group of 2 to 7 years. Children can understand conservation tasks and learn to manipulate various symbols during this stage.

So, the answer is the preoperational stage.

Answer:

B Preoperational

Explanation:

This is the answer the person above is correct!

This is for edge 2021/2022

Hope this helps!!

Answer:

Bismuth And Nitrogen

Explanation:

Because they have the same number of Valence Electrons

Answer:

There is nothing above oxygen but beneath there is sulfur as shown in the figure.

Answer:

Multiple Solutions Below:

Explanation:

In the carrier of being a scientist, they often look at scientific data, then they use that data to make a hypothesis for their experiment.

Science is an interesting field that requires a long list of procedures to ensure that everyone is safe, and that it is done in an orderly fashion.

My friends hypothesize about the idea how the badger knows how to build a dam.

At a crime scene, a CSI investigates a substance on the ground, she finds a testable question and ponders to herself about what the substance is and goes to her lab.

In English class, things are not often in bold letters on what they mean, so we have to make an inference about the text to try and decipher what they mean.

Finally,

Science is one of four main subjects taught in school from fifth to twelfth grade, and beyond.

Hope this helps, and I hope it gives you multiple things to pick as the answer! Have a good day!

The angular velocity of the coil is 125 radians/s.

We can use the following formula to find the angular velocity:

ε = NBAω

where

N = number of turns in the coil

B = magnetic field strength

A = area of the coil

ω = angular velocity

Let's rearrange the formula to get the value of ω.

ω = ε / NBA

The area of the coil can be calculated as:

A = l²

where l is the length of the side of the square coil.

The given length of the side of the coil is 15.0 cm. Converting it to meters, we get:

l = 0.15 m

Therefore,

A = (0.15 m)²

= 0.0225 m²

Now, let's substitute the values in the formula to get the value of ω.

ω = ε / NBA

= (30.0 × 10⁻³ V) / [(20)(0.050 T)(0.0225 m²)]

= 125 radians/s

Therefore, the angular velocity of the coil is 125 radians/s.

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Answer:

it would melt with the hot weather

Explanation:

It melts and the water changes color

Answer:

A

Explanation:

Explanation:

Metallic bonds hold metal atoms and freely moving valence electrons together, while Van der Waals forces hold nonpolar molecules together. OD. Metallic bonds hold metal atoms and freely moving valence electrons together while Van der Waals forces hold atoms together when they share valence electrons.

The momentum of the baseball will be "4.20 kg.m/s".

Given values are:

Mass,

Velocity,

As we know the formula,

→ \(Momentum=Mass*Velocity\)

or,

→                 \(P=mv\)

By substituting the given values, we get

→                     \(=0.14*30\)

→                     \(=4.20\) \(kg.m/s\)

Thus the above answer is correct.

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Answer:

when work is done on the system or heat comes into the system

Answer:

When the piston is pulled up, air gets sucked into the pump through the inlet. The pump chamber depressurizes as it fills with air. When the piston is forced down, the air becomes compressed and closes the inlet. Then the air flows out from the outlet

Answer:

the temperature and volume

backward movement

because momentum = mass × speed

And mass must be in positive value..

so negative value is speed

which moving backward..

The center of mass of the system is located at (1.0 m, -0.33 m).

The center of mass of a system is the point at which the system can be balanced. To find the location of the center of mass, we need to consider the masses and their respective positions. In this case, we have three masses: 1.0 kg at (0, 0), 2.0 kg at (1.0 m, 1.0 m), and 3.0 kg at (2.0 m, -2.0 m).

To determine the center of mass, we calculate the weighted average of the positions of the masses, where the weights are given by the masses themselves. We multiply each mass by its respective position and then sum these values for all the masses. Finally, we divide the sum by the total mass of the system.

Using the given values, we can calculate the center of mass as follows:

(1.0 kg * (0, 0) + 2.0 kg * (1.0 m, 1.0 m) + 3.0 kg * (2.0 m, -2.0 m)) / (1.0 kg + 2.0 kg + 3.0 kg) = (1.0 m, -0.33 m).

Therefore, the center of mass of the system is located at (1.0 m, -0.33 m).

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Answer:

F = 18.9 N

Explanation:

m = 0145 kg

a = 130 m^2

F = ma = (0.145kg)(130m/s^2) = 18.9N

Answer:

Explanation:

A ) Total energy of spring block system at height = kinetic energy at the bottom

= 1/2 m V²

= .5 x 2 x 2²

= 4 J

B )

height of ramp be h

mgh = 1/2 m ( v₂² - v₁² )

2 x 9.8 x h = 2² - 1.2²

19.6 h = 4 - 1.44

h = .1306 m

13.06 cm

C ) If distance between B and C be x₁

work done by friction = reduction in kinetic energy

= μ mg x₁ = 1/2 m ( 2² - 1.4² )

.3 x 9.8 x₁ = 1.02

x₁ = 34.7 cm

D )

If distance between C and D be x₂

work done by friction = reduction in kinetic energy

= μ mg x₂ = 1/2 m ( 1.4² - 0 )

.3 x 9.8 x₂ = .98  

x₂ = 33.33 cm

E )

Total work done by friction

= 1/2 m v² - 0 , v = 2 m /s

= .5 x 2 x 2²

= 4 J .

F )

Mechanical energy of the system at E = 0

G ) 1/2 k x² = 1/2 m v²

kx = 50 N , where x is compression and k is spring constant

k²x² / 2k = 1/2 m v²

50² / k = 2 x 1.2²

k = 868.05 N / m

H ) kx = 50

x = 50 / k

= 50 / 868.05

= 5.76 cm .

The electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

To find the electric field strength at a distance 1.20 m on the x-axis, we can use Coulomb's law:

\($$F=k\frac{q_1q_2}{r^2}$$\)

where F is the force between two charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is the Coulomb constant.For a single point charge q located at the origin of the x-axis, the electric field E at a distance r is given by:

\($$E=\frac{kq}{r^2}$$\)  where k is the Coulomb constant.

So, let's calculate the electric field due to each charge separately and then add them up:

For the +2.0 C charge at x = 0, the electric field at a distance of 1.20 m is:\($$E_1=\frac{kq_1}{r^2}=\frac{(9\times10^9)(2.0)}{(1.2)^2}N/C$$\)

For the -3.0 C charge at x = 0.40 m, the electric field at a distance of 1.20 m is:

\($$E_2=\frac{kq_2}{r^2}\)

\(=\frac{(9\times10^9)(-3.0)}{(1.20-0.40)^2}N/C$$\)

The negative sign indicates that the direction of the electric field is opposite to that of the positive charge at x = 0.

To find the net electric field, we add the two electric fields\(:$$E_{net}=E_1+E_2$$\)

Substituting the values of E1 and E2:

\($$E_{net}=\frac{(9\times10^9)(2.0)}{(1.2)^2}-\frac{(9\times10^9)(3.0)}{(0.8)^2}N/C$$E\)

net comes out to be -1.5×10⁴ N/C.

Therefore, the electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

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To determine the number of moles of F2 remaining after 3 mol of S have reacted, we need to consider the balanced chemical equation for the reaction between F2 and S. However, as the equation is not provided, we cannot provide an exact answer.

Assuming a simple stoichiometric ratio, let's consider the balanced equation:

F2 + S -> SF2

Based on this equation, for every 1 mol of S, 1 mol of F2 is required to react. Therefore, if 3 mol of S have reacted, we would expect 3 mol of F2 to have also reacted, assuming the reaction has gone to completion.

Since the initial mixture contained 9 mol of F2, and 3 mol of F2 have reacted along with the 3 mol of S, the remaining number of moles of F2 would be 9 - 3 = 6 mol.

Again, it's important to note that this is a simplified assumption based on a stoichiometric ratio, and the actual balanced equation may differ, which would affect the final result.

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True, this is because the echo sounder that is applicable to boats cannot be used directly for airplanes

By sending out sound waves and timing how long it takes for them to bounce back, an echo sounder, sometimes referred to as a sonar, is a device frequently used in boats to gauge the depth of the water beneath the craft.

When a sound pulse from an echo sounder strikes a solid item in the water, such as fish, vegetation, or other objects, the signal is reflected back to the surface.

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The unit that is normally used to measure energy is called Joule.

According to the to the MKS system. The standard unit to measure the energy is decided to be Joules.

1 joule is equal to the product of the one newton blind to the 1m displacement of the object.

1 Joule = 1 Newton x 1 meter

1 Joules = 1N-m

So, from here we can conclude that one joule is equivalent to 1 Newton metre.

Joule is not a fundamental physical quantity it is a derived quantity because it is obtained from the combination obtained by the mathematical operation on other quantities.

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Given :

A 1200 kg truck traveling at 20 m/s towards the east.

To Find :

The magnitude and direction of the momentum.

Solution :

We know, momentum is given by :

Momentum, P = mv

P = 1200 × 20 kg m/s

P = 24000 kg m/s

Now, we know, direction of momentum is same as the direction of velocity.

Therefore, momentum of truck is 24000 kg m/s and direction is towards the east.

Answer:

b. 220 V

Explanation:

Let resistors be R1, R2, and R3 respectively.

Given the following data;

R1 = 20 ohms

R2 = 30 ohms

R3 = 60 ohms

Current = 2 Amperes

To find the voltage;

First of all, we would determine the total effective resistance (RT).

For series circuit;

RT = R1 + R2 + R3

RT = 20 + 30 + 60

RT = 110 Ohms

Next, we find the voltage using the formula;

Voltage = current * resistance

Voltage = 2 * 110

Voltage = 220 Volts

Given:

The speed of the train is,

The actual frequency of the whistle is,

The speed of sound in air is,

To find:

The frequency heard by the observer

Explanation:

The apparent frequency when the train approaches the observer is given by,

Hence, the frequency heard by you is 209.2 Hz.

Answer:

\( \boxed{\tt(b) \: 4 \: times \: larger \: than \: before}\)