Which diagram below best represents the magnetic field near a bar magnet?
Answers
Since there's no choices, I will show an example.
Answer:
Refer to the diagram attached
Explanation:
What is magnetic field
Magnetic field describes the magnetic influence on moving electric charges, electric currents, and magnetic materials , which is a vector field. A moving charge experiences a force that is perpendicular to both its velocity and the magnetic field in a magnetic field.
What are magnetic field lines?
Magnetic field lines from a bar magnet are closed loops. By convention, the field direction of a magnet is assumed to be outward from the North pole and inward from the South pole. Permanent magnets can be created using ferromagnetic materials.
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Related Questions
A train is accelerating at a rate of 2 m/s. If it's initial velocity is 20 m/s, what is its velocity after 30 seconds?
Answers
Acceleration = (Final Velocity - Initial Velocity)/Time
Therefore, to work out the final velocity, we must isolate the variable in the formula. This is done by multiplying both sides by Time, and adding both sides by Initial Velocity; leaving the final velocity on its own as follows::
(Acceleration/Time) + Initial Velocity = Final Velocity
If we now substitute our values into the equation, we get 2*30 + 20 = 80
80m/s is the final velocity!
We don't know anything about the direction of the track, so we can't say anything about the train's 'velocity'. The best we can do is talk about its speed.
Speed = (initial speed) + (acceleration) x (time spent accelerating)
Speed = (20 m/s) + (2 m/s²) · (30 sec)
Speed = (20 m/s) + (60 m/s)
Speed = 80 m/s
(This is about 179 miles per hour, so if this is not a bullet train of some kind, then get ready for an ugly crash.)
A bullet is shot from a gun at an angle of 30° it’s horizontal component is 40 m/s what is the actual velocity? Make sure your calculator is in degree mode
Answers
The answer is:
[tex]46.19\frac{m}{s}[/tex]
Why?Since we know the angle and the horizontal component (x-axis component) of the initial velocity, we can calculate the actual velocity (initial velocity) using the following equation:
[tex]Vo_{x}=Vo*Cos\alpha[/tex]
Where:
[tex]Vo_{x}=40\frac{m}{s}\\Vo= Initial velocity\\\alpha = angle= 30 (degrees)[/tex]
So, from the equation we can calculate Vo,
[tex]Vo_{x}=Vo*Cos\alpha\\\\\frac{Vo_{x}}{Cos\alpha}=Vo[/tex]
Then, by substituting we have:
[tex]Vo=\frac{40\frac{m}{s} }{Cos30}=\frac{40\frac{m}{s}}{0.866}=46.19\frac{m}{s}[/tex]
Have a nice day!
Help...
An electromagnet can be made by wrapping wire around which object?
Answers
Energy is passed through
Answer: The correct answer is ''nail".
Explanation:
Electromagnet is a temporary magnet. The electromagnet is made by wrapping the coils around the soft iron. Then, pass the current through it. In this way, It will act as a temporary magnet.
As long as the current passes through it it will retain its magnetic property. When the current is not flowing through it then it will lose its magnetism.
Iron is a ferromagnetic material. It will retain the magnetic property as long as the current flows in the electromagnet.
Therefore, an electromagnet can be made by wrapping wire around the nail.
Lamars mom has a car with a 182 horsepower engine how many watts of power is that
Answers
182 Horsepower =
135,717.38 Watts
Mark as brainiest please
Answer:
135,722
Explanation:
ck12
if a car starts from a stop, and hits 27 meters per second in 8 seconds, what is its acceleration?
Answers
Hello,
Vinitial = 0
V final = 27 m/s
time = 8 seg
then
a = Delta(V) / Delta(t),
in other words:
a = (27-0)/8
a = 27/8
a= 3.375 m/s^2
Best regards
which statement about waves is false? a. waves transfer matter b. waves can change direction c. waves can interact with each other d. waves can transfer energy to matter
Answers
A.
Waves can transfer energy but they can’t transfer matter
Tue statement that is false about waves is that waves can transfer energy to matter. That is option D.
What is a wave?A wave is defined as a disturbance in a medium that carries energy without a net movement of particles.
The main properties of a wave include the following:
amplitude, frequency,period, wavelength, speed, and phase.The above properties possessed by waves makes it possible for it to be able to transfer an object, change its direction and interact with each other but not to transfer energy to matter.
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what type of meter is connected in parallel in a circuit and why
Answers
Potential difference is measured using a device called a voltmeter . Just like ammeters, some types have a pointer on a dial, but most have a digital display. However, unlike an ammeter, you must connect the voltmeter in parallel to measure the potential difference across a component in a circuit.
HOPE IT HELPS
It is just simply called a Voltmeter, and it reads potential differences.
A glass jug can be used to play different pitched sounds by blowing air over the opening of the jug and vibrating the air molecules inside the jug. The sound fluctuates with the amount of liquid in the jug, similar to the length of a pipe organ. A musician wishes to play a higher-pitched sound with their jug. What should they do?
Force more air over the opening of the jub
Remove more liquid
Add more liquid
Answers
To increase the pitch of the jug sound, remove more liquid; doing so decreases the air column inside the jug which makes the vibration faster, thereby increasing the pitch.
Explanation:The pitch of the sound produced by a jug when blown across the top is determined by the column of air that can vibrate inside the jug. The longer the air column, the lower the pitch of the sound, analogous to how longer pipes in a pipe organ produce lower notes. Therefore, to play a higher-pitched sound with a jug, the musician should remove more liquid from the jug. By doing so, he decreases the air column which makes the vibration faster, thus producing a higher-pitched sound. It is important to note that forcing more air over the opening of the jug does not change the pitch of the sound but increases the volume while adding more liquid produces a lower-pitched sound.
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4. What do orbiting satellites and the orbit of the moon around the Earth have in common?
Answers
Answer:
Central force motion
Explanation:
Answer:
Orbiting satellites are defined as the satellites that move around the earth in an elliptical path, and that takes the images and records the data of the various geological processes that undergo on the earth's surface. This is also helpful in obtaining the image of the celestial objects.
On the other hand, the moon is the natural satellite of earth, and that also revolves around the sun in an elliptical path.
These orbiting satellites and the moon orbit has something in common, that includes the balancing force. This balancing force is the force that balances the centripetal and the centrifugal force. Due to this balancing force, the satellites and the moon is able to maintain its constant circular motion. If these two forces are not balanced then either the satellites (or moon) will fall back on earth or it will move out of the earth's orbit.
The centripetal force is defined as the force that acts on a body which goes in a circular manner and is projected towards the centre of the body around which it moves. On the other hand, the centrifugal force refers to that apparent force which acts outside of a body that goes around a centre, that generates from the inertia of a body.
Which type of rock can only form on or very near Earth's surface?
Answers
For the surface,i would say Most Likely Ignious rock,since the process happens from cooling and volcanoes are mostly found on the surface of the earth, Hope this helped (:
Sedimentary for apex.
If an object had a mass of 5 kilograms, what would be the weight of the object measured on a spring scale in the unit of Newtons?
Answers
I don’t really really know
Weight is a unit of force.
Newtons measure force.
5 kg is a mass and is in kg. Kg and mass are independent of location. 5 kg is 5 kg on the moon, here on earth, on Jupiter and on Mars or anywhere else you care to name.
F = m*a
F = 5 * 9.81
F = 49.05 Newtons. This is how things should be weighed on planet earth.
how is sound detected by the brain
Answers
begin with vibrations of the eardrum. Sound waves cause the eardrum to vibrate. Cells in the cochlea detect the vibrations and send a message to the brain.
Answer:
Sound must have a means by which it can be transported, for example air. That is why there is no sound in space.
The way our brain perceives sound is through the ears. The tympanum that the human being has is connected to three bones and when the air vibrates, the tympanum also vibrates, causing these vibrations to pass through those bones towards the inner part of the ears and from there to our brain.
That is the way the brain perceives sound.
Ashlee pours some quantity of orange juice in a glass. She accidentally breaks the glass and juice spills all over the floor. Which characteristic of the juice will change?
A. mass
B. State
C. Shape
D. Volume
Answers
Only the shape of the juice will change (C), because liquids take the shape of any container you pour them into.
Pouring the juice from the bottle into the glass doesn't change its mass, stat, or volume. So why should pouring it from the glass onto the floor change any of those things ?
When Ashlee spills the orange juice on the floor, the characteristic that changes is the volume of the juice.
The characteristic of the juice that will change when it spills all over the floor is its volume. When the glass breaks, causing the juice to spill, the volume of the juice will no longer be contained within the glass.
What is normal force?
Answers
Answer:
A force that objects exert, stopping solid objects from passing through each other aka contact.
Pls mark Brainiest, am trying to become Virtuoso
Majority rule, first-come/first-served, and sharing equally are examples of _____ . productive resources non-market distribution methods opportunity costs
Answers
Non-market distribution method
non-market distribution methods, hope this helps. Have a good day.
Which of the following is an example of a speed? O A. -5 m/s2 west O B. 2m/s C. 2 m/s east O D. 3 m/s south
Answers
B is a speed.
A is an acceleration.
C and D are velocities.
The example of speed, with the unit as m/s (meter per second) in the following options is, option B. The option B has speed of 2 meter per second.
What is speed?Speed of an body is the distance traveled by it with respect to time. Speed of a object is the ratio of total distance traveled by the object to the time taken by it. It can be given as,
[tex]s=\dfrac{x}{t}[/tex]
Here, (x) is the distance traveled by a body and (t) is the time taken by it.
As the distance is measured in the meters and time is measured in the second. Thus the speed of an object is measured in meter per second (m/s).
When the distance travelled by an object with respect to time is represented with its direction, then it is called the velocity of the object in that direction.
The rate of change of velocity is called the acceleration. It is represented in the meter per squared second (m/s²).
In the given option,
The unit of option A is m/s². Thus it show, the acceleration. Option B has the units as m/s. Thus option B is an example of speed.Option C and D is has the unit m/s with direction, thus these options represents the velocity of the body.The example of speed, with the unit as m/s (meter per second) in the following options is, option B. The option B has speed of 2 meter per second.
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100 points, brainliest, and free points if you answer all correctly
1.Use the diagram to answer the question.
What would happen if some of the red blood cells were placed in beaker B?
Water would move into the cells by osmosis, causing the cells to shrink.
Water would move out of the cells by osmosis, causing the cells to shrink.
Water would move into the cells by osmosis, causing the cells to swell.
Water would move out of the cells by osmosis, causing the cells to swell
2.
Use the diagram to answer the question.
What would happen if some of the red blood cells were placed in beaker A?
Water would move into the cells by osmosis, and the cells would swell.
Water would move out of the cells by diffusion, and the cells would shrink.
Water would move out of the cells by osmosis, and the cells would shrink.
Water would move into the cells by diffusion, and the cells would swell.
3.
What would occur if some of the red blood cells were placed in beaker C? Recall that red blood cells normally float in plasma.
The concentration of water inside and outside the cells would be equal, so no osmosis would occur.
The concentration of water inside and outside the cells would be equal, so no diffusion would occur.
The concentration of water inside the cells would be less than outside, so the cells would swell.
The concentration of water inside the cells would be greater than outside, so the cells would shrink.
4.
What is a function of water in a cell?
producing lipids and carbohydrates
assisting in the production of proteins
helping the cell move and grow
preventing rapid temperature changes
5.
The cell membrane and water are both involved in _____.
directing the cell’s activities and functions
the movement of materials into and out of the cell
preventing chemical reactions from taking place
making and packaging proteins for the cell
6.
The cell membrane and water are both involved in _____.
directing the cell’s activities and functions
the movement of materials into and out of the cell
preventing chemical reactions from taking place
making and packaging proteins for the cell
7.
Which are types of passive transport?
osmosis and diffusion
diffusion and engulfing
transport proteins and osmosis
engulfing and transport proteins
Answers
1. If the red blood cells are placed in beaker B, water would move out of the cells by osmosis and cause the cells to shrink. this is because the the solution is hyper tonic compared to the red blood cell.
2. If some red blood cells are placed in beaker A,
Water would move into the cells by osmosis and the cells would swell.
3. The concentration of water inside and outside the cells will be equal so no osmosis would occur. There is no osmotic pressure.
4. Water takes part in the production of lipids and carbohydrates.
5. The membrane and water are both involved in the movement of materials into and out of the cell. The membrane is semipermeable therefore it allows the transmission of materials into and out of the cell. water acts as a solvent for the materials entering the cell as in their original forms, they can not enter through the cell membrane pores.
6. The membrane and water are both involved in the movement of materials into and out of the cell. The membrane is semipermeable therefore it allows the transmission of materials into and out of the cell. water acts as a solvent for the materials entering the cell as in their original forms, they can not enter through the cell membrane pores.
7. OSMOSIS AND DIFFUSION are both examples of passive transport as the cells do not take part in the transport. It only occurs due to uncontrollable conditions that occur in a cycle in the cell.
If the red blood cells are placed in beaker B, water would move out of the cells by osmosis and cause the cells to shrink. this is because the the solution is hyper tonic compared to the red blood cell.
Water would move into the cells by osmosis and the cells would swell. The concentration of water inside and outside the cells will be equal so no osmosis would occur. There is no osmotic pressure. Water takes part in the production of lipids and carbohydrates. The membrane and water are both involved in the movement of materials into and out of the cell. The membrane is semipermeable therefore it allows the transmission of materials into and out of the cell. water acts as a solvent for the materials entering the cell as in their original forms, they can not enter through the cell membrane pores. The membrane and water are both involved in the movement of materials into and out of the cell. The membrane is semipermeable therefore it allows the transmission of materials into and out of the cell. water acts as a solvent for the materials entering the cell as in their original forms, they can not enter through the cell membrane pores. OSMOSIS AND DIFFUSION are both examples of passive transport as the cells do not take part in the transport. It only occurs due to uncontrollable conditions that occur in a cycle in the cell.
What is necessary for a metallic bonds to form
Answers
Answer:
The electrons must be attracted to each other.
Explanation:
The complete question is:
"What is necessary for a metallic bond to form?
The atoms should be in close proximity.
The atoms should be far apart.
The electrons must be attracted to each other.
The nuclei must contain neutrons."
The metallic bond is a force that is responsible for holding the atoms together in a metallic substance. In other words, the metallic bond occurs between two metal atoms. Metal atoms need to give up electrons to achieve the configuration of a noble gas. In this way, this type of bonding all the enveloped atoms lose electrons from their outermost layers, which move more or less freely between them, forming an electronic cloud (also known as the sea of electrons).
In other words, a metal is a set of metal cations immersed in a sea of delocalized electrons where the electrostatic attraction between positive (of the cation) and negative (of the electron) charges holds together all the atoms of the metal that forms the bond .
The metallic bond is the only bond where the electrons are not located exclusively between a pair of atoms, but are relocated among millions of them in a kind of glue or "sea of electrons" that keep them tightly bound or cohesive.
The answer is: The electrons must be attracted to each other.
To form a metallic bond, certain conditions must be met, including the presence of metal atoms, valence electrons, delocalized electrons, and a metal lattice structure.
Explanation:In order for metallic bonds to form, certain conditions must be met:
Presence of metal atoms: Metallic bonds occur between metal atoms.Valence electrons: Metal atoms have one or two valence electrons that are loosely held.Delocalized electrons: These valence electrons are not associated with any particular atom and can move freely throughout the metal lattice.Metal lattice structure: The metal atoms arrange themselves in a crystal lattice structure, with positive metal ions surrounded by a sea of delocalized electrons.When these conditions are met, the valence electrons are shared among all the metal atoms, resulting in the formation of a metallic bond. This bond gives metals their unique properties, such as high electrical conductivity and malleability.
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Most oxygen in our atmosphere _____. has a single oxygen atom combines with carbon has two oxygen atoms has three oxygen atoms
answer all
Answers
Answer:
Two oxygen atoms
Explanation:
The majority of the oxygen in the air in our atmosphere consists of molecular oxygen ([tex]O_2[/tex]), which consists of 2 atoms of oxygen, since free oxygen mainly form covalent bonds with other atoms of oxygen.
A small fraction of the oxygen, however, in the ozone form, which consists of 3 atoms of oxygen bond together ([tex]O_3[/tex]).
Which vertebrae are normally fused together to form a solid mass of bone? A. Sacral B. Thoracic C. Coccygeal D. Cervical
Answers
A. Sacral is the answer.
Sacral is the vertebrae are normally fused together to form a solid mass of bone.
What is meant by vertebrae ?Vertebrae exist the 33 individual, interlocking bones that form the spinal column. Each vertebra has three primary functional components: the vertebral body for load-bearing, the vertebral arch to rescue the spinal cord, and transverse processes for ligament attachment.
The sacral region (sacrum) is at the bottom of the spine and lies between the fifth segment of the lumbar spine (L5) and the coccyx (tailbone). The sacrum is a triangular-shaped bone and consists of five segments (S1-S5) that are fused together.Sacral is the vertebrae are normally fused together to form a solid mass of bone.
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Can you balance this chemical equation?
Answers
(NH4)_2 Cr_2O_7 ===> Cr2O3 + N2 + 4H2O
I think to balance this equation, all you need do is put a 4 in front of the water.
Element # Right #Left
N 2 2
H 8 8
Cr 2 2
O 3+4 7
If a car engine accomplishes 4000 joules of work but burns gas equivalent to 16000 joules of energy, what is the efficiency of the engine
Answers
16,000/4,000=4*100= 400
Answer: 400
Answer:
The efficiency of the engine is 25%.
Explanation:
Given that,
Output energy = 4000 J
Input energy = 16000 J
The efficiency of the engine is equal to the output energy divided input energy.
Formula of the efficiency is defined as,
[tex]\eta =\dfrac{Output\ energy}{Input\ energy}\times100[/tex]
[tex]\eta=\dfrac{4000}{16000}\times100[/tex]
[tex]\eta=0.025\times100[/tex]
[tex]\eta=25\%[/tex]
Hence, The efficiency of the engine is 25%.
Boltzmann’s constant is 1.38066 × 10−23 J/K, and the universal gas constant is 8.31451 J/K · mol.
If 2.4 mol of a gas is confined to a 4.3 L vessel at a pressure of 11 atm, what is the average kinetic energy of a gas molecule? Answer in units of J.
Answers
Answer:
[tex]4.95\cdot 10^{-21} J[/tex]
Explanation:
First of all, let's convert everything into SI units:
n = 2.4 mol (number of gas moles)
[tex]p=11 atm = 1.11\cdot 10^6 Pa[/tex] (gas pressure)
[tex]V=4.3 L=4.3\cdot 10^{-3} m^3[/tex] (gas volume)
R = 8.31451 J/K · mol (gas constant)
The ideal gas equation states that
[tex]pV=nRT[/tex]
Solving for T, we find the gas temperature
[tex]T=\frac{pV}{nR}=\frac{(1.11\cdot 10^6)(4.3\cdot 10^{-3})}{(2.4)(8.31451)}=239.2 K[/tex]
And now we can find the average kinetic energy of the gas:
[tex]E_K = \frac{3}{2}kT[/tex]
where
k = 1.38066 × 10−23 J/K is the Boltzmann's constant
Substituting,
[tex]E_K = \frac{3}{2}(1.38066\cdot 10^{-23} J/K)(239.2 K)=4.95\cdot 10^{-21} J[/tex]
The average kinetic energy of the gas molecule is 4.97 × 10⁻²¹ J
Calculating the average kinetic energy of a gas moleculeFrom the question, we are to calculate the average kinetic energy of the gas molecule.
The average kinetic energy of a gas molecule can be calculated from the formula,
[tex]KE_{avg}=\frac{3}{2}k_{b}T[/tex]
Where [tex]k_{b}[/tex] is the Boltzmann's constant
and T is the temperature
Now, we will determine the temperature of the gas
From the given information
R = 8.31451 J/K.mol
n = 2.4 moles
V = 4.3 L
P = 11 atm = 1114.58 KPa
From the ideal gas equation
PV=nRT
Then, we can write that
[tex]T = \frac{PV}{nR}[/tex]
Putting the parameters into the equation, we get
[tex]T = \frac{1114.58 \times 4.3}{2.4 \times 8.31451}[/tex]
T = 240.1772
T ≅ 240.2 K
Now, for the average kinetic energy of the gas molecule
[tex]KE_{avg}=\frac{3}{2}k_{b}T[/tex]
From the given information
[tex]k_{b} = 1.38066 \times 10^{-23}[/tex]
∴ [tex]KE_{avg}=\frac{3}{2} \times 1.38066 \times 10^{-23} \times 240.2[/tex]
[tex]KE_{avg}= 4.97 \times 10^{-21} \ J[/tex]
Hence, the average kinetic energy of the gas molecule is 4.97 × 10⁻²¹ J
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Dave and Kirk are learning about electromagnetic waves in class. Dave says that gamma rays are the most dangerous because they come from outer space. Kirk disagrees. Kirk says that gamma rays are not as dangerous as ultraviolet waves since they cause sunburn. Who is right and why?
Question 12 options:
Neither are right because X-rays have radiation and are the most dangerous. That is why you have to wear a lead vest when you get dental x-rays.
Dave is partly right in his answer that gamma rays are the most dangerous, but it is because of their frequency and wavelength, not where they come from.
Neither are right. Microwaves are the most dangerous because they have the longest wavelength and the biggest frequency. Microwave kill all living things.
Kirk is right. Ultraviolet waves cause sunburn and that can be very dangerous. Too much sun can cause skin cancer.
Answers
Its B. I had the question just a week ago
Dave is right because most forms of EMR can be dangerous but the most dangerous form of Electromagnetic radiation has the most energy. This radiation is called gamma rays. Gamma rays are emitted by the nucleus of an atom and can go through 6 feet of concrete, as well as damage your DNA!
Have a nice day!
In a circuit what do lightbulbs and a toaster represent
Answers
Answer:
RESISTANCE
Explanation:
Answer:
Resistance
Explanation:
In a circuit, voltage source (cell or battery), key (for closing and opening circuit), resistance and a conducting wire are main components. Ohm's law states that current flowing in the circuit is proportional to the potential difference across the two ends.
V = I R
Where R is the resistance. Current also depends on the resistance. Greater resistance means lesser current would flow.
A light bulb and toaster represent resistance. These devices are based on Joule's Heating. When current passes through a resistance, it heats up and energy is lost as heat in case of toaster and as heat and light in case of light bulbs.
True or false olives and olive oil are staples foods in the Mediterranean diet
Answers
➷ This is a true statement. The Mediterranean diet often replaces things such as butter with olive oil.
✽➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
↬ ʜᴀɴɴᴀʜ ♡
True. Olives and olive oil are staples foods in the Mediterranean diet. I Mediterranean and i can guarantee you it 100%.
A noun-moving object always has zero Kinetic energy.true or false?
Answers
The answer is true. A non-moving object will have zero kinetic energy, however, if a moving object, for any reason, stops it's movement, the kinetic energy will then get converted into some other form of energy.
This statement is true. This is because and object gains kinetic energy when the object moves, or wastes its potential energy. Therefore, if an object is not moving, it has stored a lot of potential energy, but has zero kinetic energy.
the chemical formula for cesium oxide is cs2o. what is the charge of cesium
Answers
Charge +1
Explanation;Cs2O is a neutral compound, so the sum of the charges must total up to zero. Oxygen always has a charge of -2, so this means that Cs2 must have a sign of +2. Since +2 is the charge for 2 Cs atoms, this means that each Cs atom has a charge of +1.That is; (1 × -2) + (2 × x) = 0 , where x is the charge of Cs
= -2 + 2x = 0
= 2x = +2
x = +1
The charge of cesium in the compound with a formula of Cs₂O is +1
How do i determine the charge of cesium?To obtain the charge of cesium, Cs in the compound with a formula of Cs₂O, we shall determine the oxidation number of cesium, Cs in the compound. This is illustrated below:
Compound = Cs₂OOxidation number of O = -2Oxidation number of Cs =?Cs₂O = 0 (Ground state)
2Cs + O = 0
2Cs - 2 = 0
Collect like terms
2Cs = 2
Divide both sides by 2
Cs = 2/ 2
Cs = +1
Thus, we can conclude from the above calculation that the charge of cesium, Cs is +1
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A 250 g object is hung onto a spring. It stretches 18 cm. Find the spring's spring constant
Answers
Hooke's law establishes that the elongation of a spring is directly proportional to the modulus of the force [tex]F[/tex] applied to it, as long as the spring is not permanently deformed:
[tex]F=k (x-x_{o})[/tex] (1)
Where:
[tex]k[/tex] is the elastic constant of the spring. The higher its value, the more work it will cost to stretch the spring.
[tex]x_{o}[/tex] is the length of the spring without applying force.
[tex]x[/tex] is the length of the spring with the force applied.
According to this, we have a spring where only the force due gravity is applied.
In other words, the force applied is the weigth [tex]W[/tex] of the block:
[tex]W=m.g[/tex] (2)
Where [tex]m=250g=0.25kg[/tex] is the mass of the block and [tex]g=9.8\frac{m}{s^{2}}[/tex] is the gravity acceleration.
[tex]W=(0.25kg)(9.8\frac{m}{s^{2}})[/tex] (3)
[tex]W=2.45N[/tex] (4)
Knowing the force applied [tex]W[/tex] and [tex]x=18cm=0.18m[/tex] and [tex]x_{o}=0[/tex], we can substitute the values in equation (1) and find [tex]k[/tex]:
[tex]W=k (x-x_{o})[/tex] (5)
[tex]2.45N=k (0.18m-0m)[/tex] (6)
Finally:
[tex]k=13.61\frac{N}{m}[/tex]
To find the spring's spring constant, we can use Hooke's law, which states that the force exerted by a spring is directly proportional to the displacement of the object. By plugging in the given values, we find that the spring constant is 13.61 N/m.
Explanation:In this question, we're given a 250 g object that is hung onto a spring and stretches 18 cm. We can use Hooke's law to find the spring constant. Hooke's law states that the force exerted by a spring is directly proportional to the displacement of the object from its equilibrium position.
The formula for Hooke's law is F = -kx, where F is the force exerted by the spring, k is the spring constant, and x is the displacement.
Using the given information, we have the force exerted by the spring as F = (250 g)(9.8 m/s^2) = 2450 g m/s^2 = 2.45 N, and the displacement as x = 18 cm = 0.18 m.
Plugging these values into the formula, we get 2.45 N = -k(0.18 m).
Solving for k, we find k = -2.45 N / (0.18 m) = -13.61 N/m. However, since spring constants are always positive, the spring constant in this case would be 13.61 N/m.
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Which of the following is/are true regarding magnetic fields?
I. Magnetic field lines separate magnetic poles.
II. Magnetic field lines are spaced farther apart at the magnetic poles.
III. Magnetic fields are strongest at the magnetic poles.
A. II only B. I, II, and III
C. I only
D. III only
Answers
Here is your answer
D. III only
REASON:
1) The degree of curveness at the poles is maximum.
2) The density of field lines at and near poles is maximum.
Thus, magnetic field strength is maximum at the magnetic poles.
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