How does the direction of motion of the bar magnet affect the direction of deflection of the galvanometer needle?
Answers
If the motion (or polarity of the magnet) is reversed, the direction of deflection in a galvanometer is also reversed.
What is galvanometer?An electromechanical device used to measure electric current is a galvanometer. Early galvanometers were not calibrated, but later models, known as ammeters, were, and could measure current flow more precisely.
If the motion (or polarity of the magnet) is reversed, the direction of deflection in a galvanometer is also reversed. This suggests that an emf is produced anytime the magnetic flux connected to a coil changes.
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Related Questions
the bulb is about one meter from the battery. once the switch is closed, how long will it take for electrons from the battery to reach the bulb?
Answers
When a switch is closed, the electrons from the battery will reach the bulb at the speed of light or 299,792,458 meters per second. So, it will take approximately 3.34 x \(10^{-9}\) seconds for electrons from the battery to reach the bulb.
Electric current is the flow of electric charges. The flow of electric charges through a circuit is known as current. It is defined as the rate of flow of electric charges through a conductor. The SI unit of electric current is Ampere (A). Electric charge is a fundamental property of matter that results from an imbalance in the number of protons and electrons present in an atom or molecule. When the number of electrons is more than the number of protons, an atom or molecule is said to be negatively charged.
On the other hand, when the number of electrons is less than the number of protons, an atom or molecule is said to be positively charged. Electric potential is the work done per unit charge by an external force in moving a positive charge from infinity to a point in the electric field. The electric potential difference between two points in an electric field is the work done per unit charge by an external force in moving a positive charge from one point to another in the electric field.
The SI unit of electric potential difference is also volt (V). Therefore, , it will take approximately 3.34 x \(10^{-9}\) seconds for electrons from the battery to reach the bulb.
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therm is a unit that is generally used to measure the energy contained in natural gas. true/false
Answers
Answer: True
Explanation: got it right
Redox reactions include which types of reactions?
A. Single-replacement, double-replacement, acid-base, synthesis
B. Single-replacement, synthesis, decomposition, combustion
C. Acid-base, decomposition, double-replacement, synthesis
O D. Double-replacement, combustion, synthesis, decomposition
Answers
Answer:Single-Replacement, synthesis, decomposition, combustion.
Explanation:
Had to get it wrong to find out
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions. Hence option B is correct.
What is redox reaction ?Redox reaction is type of reaction in which oxidation number participating molecules changes. Redox reaction involves two types of the reaction oxidation and reduction. these two reaction take place simultaneous. Oxidation is the loss of electrons and reduction is the gain of electrons.
Oxidation is nothing but addition of oxygen and loss of hydrogen and reduction is loss of oxygen and gain of hydrogen.
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions.
The oxidation half-reaction is: H₂ → 2H⁺ + 2e⁻
The reduction half-reaction is: F₂ + 2e⁻ → 2F⁻
Hence option B is correct.
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please solve this in notebook and send please
Answers
Answer:
Amplitude: The maximum displacement of a Vibrating body from its central position.
Time period : The time taken by one complete vibration to pass a given point.
Frequency: The number of waves that pass a point in a particular amount of time.
Answer:
\( \fbox{ \sf{ \: Below \: in \: bold}}\)
Explanation:
\( \star{ \: \: \underline{ \sf{Amplitude}}} : \) The maximum displacement of a particle from its mean position in a wave is called amplitude of a wave. It occurs at crest and trough in a transverse wave and at compression and rarefaction in a longitudinal wave. It's SI unit is ' m '.
\( \star{ \underline{ \: \sf{ \: Time \: period}}} : \) The time taken by a wave to travel complete one cycle of a complete wave is called time period. It's unit is second. For example : if a sound wave takes two seconds to complete one cycle , it's time period is two seconds.
\( \star{ \underline{ \sf{ \: \: Frequency}}} : \) The number of complete waves , set up in a medium in one second is called frequency of the wave. The SI unit of frequency is hertz ( Hz ). For example , if a sound wave completes 15 compressions and 15 rarefactions in one second , it's frequency is 15 Hz. Kilohertz ( KHz ) and megahertz ( MHz ) are the higher units of frequency.
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Linear momentum is conserved is a system when the net force is equal to
Answers
Answer:
zero
Explanation:
The linear momentum is conserved when the system is closed. Therefore, the net force is zero.
A man walks 7 km East in 2 hours and then 2.5 km West in 1 hour. What is
the man's average velocity for the whole journey?
Answers
We know that, Velocity is the rate of displacement covered. Displacement is the shortest path between the Initial and Final point covered by the body. So,
Velocity = Displacement / TimeAnd, when it comes to Average velocity, It is the total displacement by total time taken. So, By using this let's solve this question.....
Solution:✏️ Refer to the attachment...
Let the body goes to point A that is 7 m East of the Initial point. Then it comes backward because West is opposite to East in perpendicular direction. It covers 1.5 m backwards in the same line to reach B which is the Final point.
So,
Displacement = Final point - Initial point⇛ Displacement = 7 m - 1.5 m
⇛ Displacement = 5.5 m
Total time taken,
⇛ 2 hours + 1 hour
⇛ 3 hours
Finding Average displacement,
⇛ Total displacement / Total time taken
⇛ 5.5 m / 3 hours
⇛ 1.83333.... hours
So, the Final answer is,
\( \huge{ \boxed{ \bold{ \purple{1.8 \bar{3}m}}}}\)
━━━━━━━━━━━━━━━━━━━━
how does an elevator model Newton’s First Law of Motion?
Answers
When the elevator is going up, though, you are accelerating, which adds more force to the scale and increases your apparent weight. When the elevator is going down, the same is true, but the acceleration is negative, subtracting force from the scale and decreasing your apparent weight.
Milk of magnesia is a slippery, bitter-tasting white substance that is commonly used as a laxative. If the pH of milk of magnesia is between 10 and 11, it can best be described as a
Answers
Answer:
a moderate base
Explanation:
Milk of magnesia is popularly known as magnesium hydroxide. Magnesium hydroxide Mg(OH)₂ is used as an anti-acid in toothpaste and medically as a mild laxative.
Its pH values range between 10- 11 on the pH scale.
A solution with pH value of 7 is neutral(i.e. neither acidic nor basic.
A pH value which is less than 7 is acidic while a pH value greater than 7 is basic.
For a pH value between 12 -14 on the pH scale is said to be a strong base.
Since Milk of magnesia Mg(OH)₂ pH values ranges between 10- 11 on the pH scale, it is known to be moderately basic.
This theory states that Earth's plates move on top of the mantle at a slow and
constant rate due to convection currents
Answers
Answer:
The theory of plate tectonics proposes that the Earth's outer layer, or lithosphere, is broken up into a number of large plates that interact with one another. These plates are slowly moving across the Earth's surface, driven by convection currents in the mantle below.
The mantle is the layer of the Earth that lies beneath the crust, and it is made up of hot and viscous rock. At certain depths, the mantle rock can become partially molten, and this creates convection currents. These currents are driven by the heat difference between the deeper, hotter parts of the mantle and the cooler, shallower regions.
As these convection currents move, they push against the base of the lithosphere, which is divided into several plates. The interaction between these plates creates a variety of geological features, including mountain ranges, volcanoes, and earthquakes.
The movement of the plates is hardly noticeable in human terms, with rates of movement averaging to just a few centimeters per year. However, over millions of years, these small movements can add up, leading to significant changes in the Earth's geography and climate. For example, the collision of two plates can result in the formation of a mountain range, while the separation of two plates can create a new ocean basin.
A block of mass M is attached to a spring of negligible mass and can slide on a horizontal surface along the x-direction, as shown above. There is friction present between the block and the surface. The spring exerts no force on the block when the center of the block is located at x=0. At the instant shown above, the block is located at x=0 and moving toward the right with speed v=v0. (a) For the instant shown above, with the block located at x=0 and moving to the right, predict the direction of the net force on the block. If the net force is zero, select “The net force is zero.”
_ To the left _ The net force is zero _ To the right
Briefly justify your prediction.
Answers
Answer:
Because of the frictional force, the net force will oppose direction of the block and be directed towards the left even tho the spring exerts no force at this point
Can someone help me PLEASEEE ASAP
Answers
Answer:
12 meters and 2 n
Explanation:
16 - u = 6 (8.0 + 11)
P1= 100 kPa
V1= 5 L
T1= 300 degrees Kelvin
P2=100 kPa
V2= ? L
T2= 350 degrees Kelvin
Answers
Explanation:
using Charles law; since the pressure is constant
V1/T1 = V2/T2
5/300 = V2/350
cross multiply
V2 X 300 = 5 X 350
V2 = 1750/300
V2 = 5.833L
Name:
Date:
12. Maria hiked up Kennesaw mountain heading east. She hiked for a total of 2 hours, and
covered a total distance of 6 miles. What was her average velocity?
Answers
The average velocity of the Maria is equal to 3 miles/hour.
What is average velocity?The average velocity of an object can be described as a vector quantity and can be defined as the change in position (∆x) of the object divided by the time intervals (∆t) in which it takes place.
The average velocity can be positive or negative and has a unit of measurement of m/s but can be measured in miles per hour or kilometers per hour.
Average velocity of body = ∆x/∆t
The average velocity of a body involves just the displacement of the object. However, the magnitude of the distance of an object can be different from the real path length.
Given, the total distance covered by the maria = 6 miles
The time by Maria = 2 hours
The average velocity of Maria = 6/2 = 3 mph
Therefore, the average velocity of Maria is 3 mph.
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this is a 3 part question6) (a) Your heart beats with a frequency of 1.45 Hz. How many beats occur in a minute? (b) If the frequency of your heartbeat increases, will the number of beats in a minute increase, decrease, or stay the same? (c) How many beats occur in a minute if the frequency increases to 1.55 Hz?
Answers
Given,
The initial frequency of the heartbeat, f₁=1.45 Hz
The increased heartbeat, f₂=1.55 Hz
The frequency of the heartbeat can be described as the number of occurence of the heartbeat per second. That is every second, the heart beats 1.45 times.
(a)
Thus for a minute, the number of the heartbeats is,
\(\begin{gathered} N_1=f_1\times60 \\ =1.45\times60=87 \end{gathered}\)Thus 87 beats occur for a minute.
(b)The increase in the frequency of the heartbeat implies the increase in the number of the heartbeat for every second. And hence the beats in a minute increase when the frequency of the heartbeat increases.
(c)
The number of the beats per minute after the increase of the frequency is,
\(\begin{gathered} N_2=f_2\times60 \\ =1.55\times60 \\ =93 \end{gathered}\)Thus after the increase in the frequency, 93 beats occur in a minute.
For two nucleons 2 fm apart, the strong force is ________. A) strongest for two interacting neutrons. B) strongest for a proton interacting with a neutron. C) strongest for two interacting protons. D) equally strong for any combination of protons and neutrons.
Expert A
Answers
Answer: B
Explanation:
Main answer: B) strongest for a proton interacting with a neutron.
EXPLANATION: The strong force, which is one of the four fundamental forces in nature, is responsible for holding the nucleus of an atom together. It is the strongest force among the four fundamental forces, but it has a very short range, typically limited to within the size of a nucleus. For two nucleons (protons or neutrons) 2 fm (femtometers) apart, the strong force is strongest for a proton interacting with a neutron. This is because the strong force is mediated by the exchange of particles called mesons, which carry a "nuclear charge" and are attracted to opposite nuclear charges. Since protons have a positive nuclear charge and neutrons have no nuclear charge, a proton and neutron will attract each other strongly through the exchange of mesons. In contrast, two protons or two neutrons will repel each other due to their similar nuclear charges, resulting in a weaker strong force between them. Therefore, the correct answer is B) strongest for a proton interacting with a neutron.
Hi, I'd be happy to help with your question.
Main answer: For two nucleons 2 fm apart, the strong force is D) equally strong for any combination of protons and neutrons.
EXPLANATION: The strong force, also known as the strong nuclear force, is responsible for binding protons and neutrons together in the nucleus. This force is independent of the electric charge of the nucleons, so it acts equally strong between any combination of protons and neutrons. Therefore, it doesn't matter if the interaction is between two neutrons, two protons, or a proton and a neutron; the strong force remains equally strong in all cases.
The diagram shows a circuit with a 3-cell battery, a light bulb, and four labeled locations. Which statement describes the direction of conventional current in this circuit?
Answers
The statement that correctly describes the direction of conventional current in the circuit is : ( C ) current is directed from A to B to C to D
Conventional currentconventioanl current is simply the flow of protons from the positive terminal of the voltage source ( battery ) to the negative terminal of the battery. Also conventional current is the charge transferred in a given direction per unit time. for a conventional current the charge carrier is irrelevant.
Hence we can conclude that the direction of conventional current in the circuit is : current is directed from A to B to C to D.
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Attached below is the missing part of the question
Yub87654d HELP there is this person trying to kid,.,nap,./, kids so if you see an account called Hernyana report there questions and there account
copy my question and post it
76ryvubiuoj78
Answers
Answer:
what???
Explanation:
Calculate the total work done (J) by a force given by: F = ( 3i
-6j) N to move an object a displacement given by: R = ( 8i +
6k) m
O a
- 12
Rb
18 i-48)
C C
C
24i - 36j
O d.
d
+ 24
Answers
Work done (J) by the force is 60i - 78j + 18k.
Given,
F = (3i - 6j) NR
= (8i + 6k) m – 12i – 18j + 24J
= F * dJ = (3i - 6j) * (8i + 6k – 12i – 18j + 24)J
= (3i - 6j) * (-4i - 18j + 6k + 24)J
= (-12i - 54j + 18k + 72i - 24j)J
= (60i - 78j + 18k)J
Work done (J) by the force is 60i - 78j + 18k.
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Select the correct answer.
If you increase the frequency of a sound wave four times, what will happen to its speed?
OA
The speed will increase four times.
OB.
The speed will decrease four times.
The speed will remain the same.
OD.
The speed will increase twice.
O E.
The speed will decrease twice.
Answers
how many electrons can be held in the second orbital
Answers
The second orbital, also known as the "2s orbital," can hold a maximum of 2 electrons.
In the Bohr model of the atom, electrons occupy different energy levels or orbitals around the nucleus. Each orbital has a specific capacity to hold electrons. The second orbital, which belongs to the second energy level, consists of a single spherical 2s orbital. According to the Pauli exclusion principle, each orbital can hold a maximum of two electrons, with opposite spins. Therefore, the second orbital can accommodate a maximum of 2 electrons.
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The moment of the couple is 600k (N-m). What is the angle A? F = 100N located at (5,0)m and pointed in the positive x and positive y direction -F = 100N located at (0,4)m and pointed in the negative x and negative y direction
Answers
To find the angle A, we will use the formula for the moment of a couple:
Moment = F * d
where Moment is the moment of the couple (600k N-m), F is the force (100 N), and d is the perpendicular distance between the two forces.
1. Calculate the coordinates of the two forces:
F1: (5, 0) with positive x and positive y direction
F2: (0, 4) with negative x and negative y direction
2. Determine the vector representing each force:
F1: 100N (cos(A), sin(A))
F2: -100N (-cos(A), -sin(A))
3. Calculate the distance between the points (5, 0) and (0, 4):
d = sqrt((5 - 0)^2 + (0 - 4)^2)
d = sqrt(25 + 16)
d = sqrt(41)
4. Use the moment formula to find the angle A:
600k = 100 * sqrt(41) * sin(A)
5. Divide both sides by 100 * sqrt(41):
6k = sin(A)
6. Take the inverse sine (arcsin) of both sides to find the angle A:
A = arcsin(6k)
Since the value of k is not given, the angle A cannot be determined precisely. However, if k is provided, you can substitute it into the expression "arcsin(6k)" to find the angle A.
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a 1.00-m rod of negligible mass connects two very small objects at its ends. the mass of one object is 1.50 kg and the mass of the other is unknown. the center of mass of this system is on the rod a distance 0.4 m from the 1.50-kg mass object. what is the mass of the other object?
Answers
The mass of the other object is 2.25 kg.
Let the mass of the unknown object be denoted as m. Using the formula for center of mass, we can set up the equation: (1.50 kg)(0.4 m) = m(0.6 m). Solving for m, we get m = 2.25 kg. The problem can be solved using the equation for the center of mass of a two-object system. The distance of the center of mass from one of the objects can be used to find the mass of the other object. By setting up the equation and solving for the unknown mass, we get the value of 2.25 kg.
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Drag each label to the correct location on the chart. Each label can be used more than once.
Classify the waves as longitudinal or transverse.
Answers
2 - transverse
3 - longitudinal
4 - im not sure what that object is but i think its longitudinal.
In the given options diagram 1 and 3 are representing longitudinal waves while diagrams 2 and 4 are representing transverse waves.
What is a transverse and longitudinal wave?Transverse waves are described as waves that oscillate along routes that are perpendicular to the propagation direction of the wave. Examples of transverse waves involve water surface ripples and seismic S waves.
A longitudinal wave can be described as the displacement of the particle parallel to the direction of the propagation. Sound waves in air, primary waves of an earthquake, and the vibration of a spring are longitudinal waves.
A transverse wave has every particle of the medium traveling around its mean location in a direction that is the opposite from the propagating direction of the wave.
Transverse waves can be generated by only the surface of liquids and solids. Transverse waves cannot be created in liquids or gases.
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Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.What is the purpose of step 1
Answers
Answer:
The purpose of step 1 is to induce magnetism into the needle, so that it retains magnetism and behaves as a magnet after the process.
Explanation:
The method of production the needle magnet in the procedure is the single stroke. This process involves a continuous stroking of a magnetic object (e.g needle) repeatedly for a period or number of times with a permanent magnet. Thus, when the permanent magnet is removed, the object retains magnetism, and behaves like a magnet.
The importance of the stroking process is the turn a magnetic object to a magnet by inducing magnetism into it.
a mother and a daughter are sitting on park swings. they ask you to push them so they can swing to the same height. which will require you to push with more force?
Answers
Answer:
the mother
Explanation:
the child is smaller and has less mass so it would be easier to push the baby rather than the mother. so you would put more force into pushing the mother
A box of mass 60 kg is at rest on a horizontal floor that has a static coefficient of friction of 0.6 and a kinetic coefficient of 0.25
a)The minimum force necessary to start moving the box
b) The friction force and the acceleration of the box if a horizontal force of 400 N is applied
Answers
Answer:
a) F = 353.2 N
b) \(F_{f} = 147.2 N \)
a = 4.21 m/s²
Explanation:
a) The minimum force necessary to start moving the box s given by:
\(\Sigma F = 0\)
\( F - \mu_{s}N = 0 \)
\( F = \mu_{s}mg \)
Where:
F: is the force applied to move the box
μs: is the static coefficient of friction = 0.6
m: is the mass = 60 kg
g: is the gravity = 9.81 m/s²
\( F = 0.6*60 kg*9.81 m/s^{2} = 353.2 N \)
b) The acceleration is:
\( F - F_{f} = ma \)
\( F - \mu_{k}mg = ma \)
\( a = \frac{F - \mu_{k}mg}{m} = \frac{400 N - 0.25*60 kg*9.81 m/s^{2}}{60 kg} = 4.21 m/s^{2} \)
Now, the friction force is:
\( F_{f} = \mu_{k}mg = 0.25*60 kg*9.81 m/s^{2} = 147.2 N \)
I hope it helps you!
Which will not be affected by the induced e.m.f when a magnet is in motion relative to a coil? A. Motion of the magnet B. Resistance of the coil C. Number of turns of the coil D. The strength of the magnet pole
Answers
The strength of the magnet pole (option D) will not be affected by the induced electromotive force (e.m.f) when a magnet is in motion relative to a coil.
When a magnet is in motion relative to a coil, it induces an electromotive force (e.m.f) in the coil due to the changing magnetic field. This induced e.m.f. can cause various effects, but it does not directly affect the strength of the magnet pole (option D). Option A, the motion of the magnet, is directly related to the induction of the e.m.f. When the magnet moves, the magnetic field through the coil changes, inducing the e.m.f.
Option B, the resistance of the coil, affects the amount of current flowing through the coil when the e.m.f is induced. Higher resistance can limit the current flow. Option C, the number of turns of the coil, affects the magnitude of the induced e.m.f. More turns increase the induced voltage.
However, the strength of the magnet pole (option D) itself is independent of the induced e.m.f. It is determined by the properties of the magnet, such as its magnetization and magnetic material. The induced e.m.f does not alter the intrinsic strength of the magnet pole.
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What happens to the speed of sound in a medium when the bulk modulus of the medium increases
Answers
When the bulk modulus of the medium increases, the speed of sound increases
The bulk modulus, which is often referred to as incompressibility, is a gauge of a substance's resistance to volume changes when compressed from all sides. It is determined by dividing the ratio of the applied pressure by the relative deformation.
Sound waves are mechanical waves, which means they are oscillations of matter. Hence they require a medium or system of particles (solid, liquid, or gas) to travel through. If the particles of the medium are near to each other, the transmission of energy is easy and hence, the wave travels faster.
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15. A sample of hydrogen has a A sample of hydrogen has a volume of 51 under the
pressure of 5atm what will be the pressure of this
gas
be if
the volume were reduced to 51.
A. 25atm B. 15 atm C. 10 atm D. 5atm
Answers
Answer:
A
Explanation:
Correct option is A)
We know that pressure of a gas is inversely proportional to its volume (Boyle's Law). So, one of the gas equations can be written as-
P 1 V 1 =P 2 V 2 , where P 1 and V 1 are the initial conditions of pressure and v olume of a gas. And P 2 and V 2 are the final conditions of pressure and volume of the gas. In the question given, P 1 is 5atm. The value of V 1 IS 25L. The final pressure is unknown and let it be P 2 , whereas, the final volume is reduced to 5L. Putting all these values in the above mentioned equation we get, P 1 V 1 =P 2 V 2 Or, 5×5=P 2 ×5 Or P 2 = 5 125 P 2 = 25 atm.
What law best relates to energy loss within an ecosystem? First law of thermodynamics. second law of thermodynamics. third law of thermodynamics.
Answers
The second law of thermodynamics best relates to energy loss within an ecosystem.
This law states that in any energy transfer or transformation, some energy is lost as unusable heat. In an ecosystem, energy is constantly being transferred from one organism to another, and with each transfer, some energy is lost as heat. Therefore, the second law of thermodynamics helps explain why energy loss is a natural occurrence within an ecosystem. The second law of thermodynamics is a physical principle founded on the knowledge of how heat and energy are transformed throughout the world. A straightforward explanation of the law is that heat always transfers from hotter to cooler objects until energy of some kind is applied to change the flow of heat.
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