When magnets are pushed together, the north poles of one magnet will repel the north pole of the other magnet, and the south pole of one magnet will repel the south pole of the other magnet. This is known as repulsion.
When magnets are let go after being pushed together, they will naturally move away from each other as the repulsion force is no longer being applied. This is known as "releasing."
When two magnets are brought close to each other, the invisible lines of magnetic force, called magnetic fields, interact with each other. Opposite poles, such as the north pole of one magnet and the south pole of another magnet, are attracted to each other. This phenomenon is known as attraction. On the other hand, similar poles, such as the north pole of one magnet and the north pole of another magnet, will push away from each other. This is known as repulsion.
When magnets are pushed together, the repulsion force between them is greater than the attraction force. This is why they will move away from each other when they are let go. However, if the magnets are very strong or if they are physically prevented from moving away from each other, they will not move away from each other when they are let go.
In addition to this, the strength of the magnetic field decreases as you move farther away from the magnet, so the farther apart the magnets are, the weaker the force of attraction or repulsion between them will be.
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The electric potential in a region of space is V=350Vm/√x2+y2?, where x and y are in meters.What is the strength of the electric field at (x, y) = (2.3m, 2.9m)? Express your answer using two significant figures. E = ...?What is the direction of the electric field at (x, y) = (2.3m, 2.9m)? Give the direction as an angle ccw from the positive cc-axis. Express your answer using two significant figures.θ = ...?
The direction of the electric field at (x,y) is 56.3.
What is electric field?An electric field is a force field that surrounds electric charges, and can exert a force on other charges placed within the field. It is represented by lines of force, and the strength of the field is determined by the amount of charge present and the distance from the charge. Electric fields can be created by stationary charges, moving charges, and changing magnetic fields.
The strength of the electric field at (x, y) = (2.3m, 2.9m) can be found by taking the negative gradient of the electric potential:
E = -grad V = -(dV/dx, dV/dy)
= -(d(350Vm/√x^2+y^2)/dx, d(350Vm/√x^2+y^2)/dy)
By using the chain rule we can find the derivative of the expression:
E = -(d(350Vm/√x^2+y^2)/dx, d(350Vm/√x^2+y^2)/dy) = -( -350Vm/√x^2+y^2 * (x/√x^2+y^2), -350Vm/√x^2+y^2 * (y/√x^2+y^2))
substitute the values:
E = -(-350Vm/√(2.3^2 + 2.9^2)(2.3/√(2.3^2 + 2.9^2)), -350Vm/√(2.3^2 + 2.9^2)(2.9/√(2.3^2 + 2.9^2)))
= (276.8 V/m, 340.9 V/m)
The direction of the electric field at (x, y) = (2.3m, 2.9m) can be found by taking the inverse tangent of the y-component of the electric field divided by the x-component:
θ = atan(Ey/Ex) = atan(340.9 V/m / 276.8 V/m) = 56.3° (ccw from the positive x-axis)
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The bar magnet is pushed toward the center of a wire loop. Which is true?
a) There is a counterclockwise induced current in the loop.
b) There is no induced current in the loop.
c) There is a clockwise induced current in the loop
There is a clockwise induced current in the loop. Since the bar magnet is moving towards the center of the loop, it causes a decrease in the magnetic field passing through the loop.
How does the movement of a magnet affect the induced current in a wire loop?The movement of a magnet affects the induced current in a wire loop as it causes a change in the magnetic field passing through the loop. According to Faraday's Law of Induction, a change in magnetic field induces an electromotive force (EMF) in the loop, which in turn causes an induced current to flow.
How does Lenz's Law determine the direction of induced current?Lenz's Law states that the induced current will flow in such a way as to oppose the change in magnetic field that induced it. This means that if the magnetic field passing through a wire loop is increasing, the induced current will flow in a direction that creates a magnetic field that opposes the increasing magnetic field.
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a 750 pound motorcycle is headed up a hill inclined at 15 degrees. what force is required to keep the motorcycle from rolling back down the hill when stopped at a red light
The force required to keep the motorcycle from rolling back down the hill when stopped at a red light is 260 newtons.
Calculation-To calculate this force, we can use the following equation:
friction force = friction coefficient * normal force
where,
friction coefficient = coefficient of static friction between the tires and the road surface
normal force = perpendicular force exerted on the object by the surface it is in contact with (in this case, the road surface)
The normal force can be calculated using the following equation:
normal force = weight * cos(theta)
where,
weight = 750 pounds (converted to newtons)
theta = angle of incline (15 degrees)
First, convert 750 pounds to newtons by multiplying it by 4.448
The angle of incline should be converted to radians before being used in the equation:normal force = weight * cos(15 degrees) = 337.5 * cos(0.2618) = 337.5 * 0.9659 = 325.2 newtons
Then the friction force = friction coefficient * normal force = 0.8 * 325.2 = 260 newtons
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a student in track and field is running a hurdles race. the hurdles are 91.4 cm tall. the student is running with a horizontal velocity of 4.00 m/s and leaps with a vertical velocity of 9.00 m/s. if the student makes this leap 0.400 m before the hurdle, will they clear the hurdle? if they clear the hurdle, how much do they clear the hurdle by? if they do not clear the hurdle, what could they do to have a higher jump?
No, they will not be able to clear the hurdle from the given distance of their leap.
What are the projectile motion?
Projectile motion includes vertical and horizontal velocity components. It's important to understand that the two are independent of each other. But what is a projectile and what is a good example. Well, a projectile is an object that is thrown by applying a force that falls under gravity and is subject to the resistance of the medium in which it travels. It can be thrown into the air and fall under the influence of gravity.
First of all the time required to reach the hurdle is:
by using horizontal velocity we have time =
t = 0.100s
Now for the vertical distance covered by student:
S = ut + gt²
S = 9 × 0.100 + 9.8 × 0.100²
S = 0.851m or 85.1cm
Since the distance calculated is less than the height of hurdles which is 91.4 cm so the student may not be able to clear the hurdle.
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what method would astronomers use to find the distance to a galaxy (or quasar) so far away that individual stars are impossible to make out (resolve)?
By calculating the distortion of those galaxies and then using Doppler's formula to convert the redshift to a recession velocity, one can determine the distances to the universe's most distant objects.
How would scientists determine the distance to either a galaxy that is so far enough that it is impossible to measure the distance to individual stars?A galaxy's hue and surface brightness irregularities (SBF, for short) can be used by astronomers to determine a galaxy's distance from Earth. When measured in this way, most galaxies are thousands of light years from us.
Why is the distance ladder used to describe methods for calculating galaxies' distances?The reason it is called a ladder is because each level or measurement system depends on the one before it The more journeys astronomers took to get there, the larger the distance that has been measured. The sole "direct" approach available to astronomers to gauge distance outside the Planetary System is stellar parallax.
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A 5-kg object is sliding to the right and encountering a friction force that slows it down. The coefficient of friction between the object and the surface is 0.1. Determine the force of gravity, the normal force, the force of friction, the net force, and the acceleration
Answer:
Explanation:
The friction force is 4.9 N
Explanation:
Friction Force
When an object is moving and encounters friction in the air or rough surfaces, it loses acceleration or speed because the friction force opposes motion.
The friction force when an object moves on a horizontal surface is calculated by:
Where is the coefficient of static or kinetics friction and N is the normal force.
If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal are equal in magnitude:
N = W = m.g
Thus, the friction force is:
The object has a mass of m=5 Kg, calculate the weight:
W = 5 * 9.8 = 49 N
It encounters a friction force that slows it down. We are given the coefficient of friction μ = 0.1, thus the friction force is:
Fr=0.1 49 N = 4.9 N
The friction force is 4.9 N
Since the only force acting on the object is the friction force, thus the net force is F = 4.9 N, and the acceleration can be calculated by using the equation of Newton's second law:
F = m.a
Solving for a:
The friction force is 4.9 N
Explanation:
Friction Force
When an object is moving and encounters friction in the air or rough surfaces, it loses acceleration or speed because the friction force opposes motion.
The friction force when an object moves on a horizontal surface is calculated by:
Where is the coefficient of static or kinetics friction and N is the normal force.
If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal are equal in magnitude:
N = W = m.g
Thus, the friction force is:
The object has a mass of m=5 Kg, calculate the weight:
W = 5 * 9.8 = 49 N
It encounters a friction force that slows it down. We are given the coefficient of friction μ = 0.1, thus the friction force is:
Fr=0.1 49 N = 4.9 N
The friction force is 4.9 N
in the use of coal to produce energy, which does not decrease the energy efficiency of the process? * 1 point extracting the coal from the ground waste heat cogeneration energy required to build the power plant
the power efficiency of the procedure when using coal to produce energy extracting the coal again from earth gasification energy required to construct the power plant.
What kind of coal burns with the greatest amount of thermal energy released?Lignite has the minimum energy output of all coal grades and contains 25%–35% carbon. Lignite coal deposits are frequently rather recent and have not been subjected to high temperatures or pressures. Due to its high moisture content and brittle nature, lignite has a low heating value.
Which of the aforementioned Macq sources has the highest energy production?The Urban Local Organizations of the individual cities are to carry out the program. The MNRE/GOI approved the construction of Faridabad and Dwarka as Solar Cities with its sanction dated 25.6.09, at an estimated Photovoltaic solar energy in particular is gaining popularity.
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Suppose you have the equilateral triangle JKL where each side measures 5 feet with an altitude from K to JL. Which is the measure of the altitude?
The measure of the altitude of the equilateral triangle JKL is 4.33 feet
We have an equilateral triangle JKL that has a side of length 5 feet.
Now if we draw an altitude from K to J.
We can assume that the major the altitude is H.
We can assume the altitude to be perpendicular to the base.
The altitude should be by setting the base into two equal parts so we will have another triangle that will have a base of length 2.5 feet and hypotenuse of 5 feet.
Now we can simply with the Pythagoras theorem and order to find the attitude,
H² = (5)²-(2.5)²
H² = 25-6.25
H = 4.33 feet.
So, the altitude is of the magnitude 4.33 ft.
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a 100 n force is applied to a 15 kg box causing the box to move a horizontal distance of 5 m at a constant velocity. what is the work that is done by this force?
The work done by the force applied on the box which has a mass of 15 kg is 500 Nm
The mass of the box = 15 kg
The force applied on the box = 100 N
The horizontal distance by the box = 5 m
The work done by the force applied on the box can be found using the formula,
W = F x d
where W is the work done
F is the force applied to the box
d is the distance moved by the box
Let us substitute the known values in the above equation, we get
W = 100 x 5
= 500 Nm
Therefore, the work is done by the force applied to the box.
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At what speed do a bicycle and its rider, with a combined mass of 100 kg , have the same momentum as a 1400 kg car traveling at 1.6 m/s
The speed at which a bicycle and its rider, with a combined mass of 100 kg, have the same momentum as a 1400 kg car traveling at 1.6 m/s is 50.4km/hr
The momentum of a bicycle and its rider, with a combined mass of 100 kg, is equal to the momentum of a 1400 kg car traveling at 1.6 m/s.
Momentum is calculated by multiplying the mass of an object by its velocity.
Therefore, the bicycle and rider would need to be traveling at a velocity of 14 m/s
1.6 m/s × 100 kg/1400 kg=14m/s
To have the same momentum as the car. In terms of speed, 14 m/s is equal to 50.4 km/h.
Therefore, the bicycle and rider would need to be traveling at 50.4 km/h to have the same momentum as the car.
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Which of the following algorithms will allow the robot to make a single circuit around the rectangular region of black squares, finishing in the exact location and direction that it started in each of the four grids
Follow all the steps which is given below after the word solution.
What is a circuit?A closed loop in which electrons can move called a circuit. Electricity is supplied to the circuit by an electricity source, such as a battery. No electron will move till the circuit is finished, that is, it goes full circle to the electrical supply.
The solution is -
Step 1: Continue advancing one square at a time until the square directly to the robot's right is no longer black.
Step 2: Make a right turn and advance one square.
Step 3: Recurring the first and second steps three more times.
Why?
The robot begins in one of the four grids alongside a black area.
In the first step, the robot travels just past the edge of the dark area.
In step 2, the robot spins to the right and advances, positioning itself along next side of a black area.
Step 3 will involve repeating Steps 1 and 2 in order to maneuver the robot around the remaining three sides and make a full circuit of the dark area.
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how fast must the rocky core of jupiter have developed after the sun formed in order to gravitationally attract its hydrogen and helium atmosphere before these gases were dissipated from the solar nebula by the solar wind?
It took 10 million years for the formation of rocky core of Jupiter developed after the sun formed in order to gravitationally attract its hydrogen and helium atmosphere.
How long does a rocky planet take to form?Gas giants like Jupiter grow on top of rocky cores after rocky planets with rocky surfaces like Earth do over the course of millions of years. New data, however, from NA SA's Spitzer Space Telescope points to the possibility that some gas giants could bud in less than a million years, more akin to planetary wildflowers than trees.
Why couldn't rocky planets develop in a distant solar system?As far as planetary formation is concerned, rocky planets have a tendency to form closer to the Sun because the silicates and heavier gases that make them up "fall" inwards towards the Sun.
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under what circumstances would a vector have components that are equal in magnitude? the vector lies at a 60 degree angle with two axes along which the component lie. the vector lies at a 45 degree angle with two axes along which the component lie. the vector lies at a 30 degree angle with two axes along which the component lie.
When a vector's components are identical in size, it means that the vector is at a 45° angle to the axis along which the components are located.
What needs to be true in order for a vector's components to have equal magnitudes?Only when two vectors share the same direction and magnitude are they regarded as being equal. Given that they share the same size and direction, the vector v and w are equivalent. Because they have opposite directions, vector v and w are still not identical.
Which one of the following comments about equal vectors is accurate?If the magnitude and direction of two vectors are the same, they are said to be equal. If they share the same original comment and are collinear, they will be initial if the same line is parallel to both vectors.
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what is wrong when you see the reflectors on the highway brightly shining with your regular beam headlight on?
The headlights may need to be adjusted or there may be an issue with the alignment of the vehicle.
Are the reflectors on the highway clean and free of debris?It is important to ensure that the reflectors on the highway are clean and free of debris as this can affect their ability to reflect light. If there is dirt, grime, or other debris on the reflectors, they may appear dimmer or not reflect light at all, making it harder for drivers to see them. It is important to regularly maintain and clean the reflectors to ensure they are functioning properly. This can be done by highway maintenance crews or through regular clean-up efforts by local communities. Additionally, if you see any debris on the reflectors, it's important to report it to the proper authorities.
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A wooden block is attached to a magnet, which allows it to hover over another magnet placed on a table. If we add weight to the wooden block, will the height of the wooden block be lower than before, or will the wooden block stay at the same height above the table?
Explanation:
I assume the polls of the 2 magnets are +/+ and -/- aligned, so that both magnets repel each other.
when we add weight, it will be lower, as more weight (more pressure, more power) forces the magnets to get closer, as their repelling force is constant per distance.
the figure shows four charges at the corners of a square of side l. assume q and q are positive.
The magnitude of the charges on the corners of square is Fr = 1.91 × 9×10⁹q²/L².
Suppose the square's corners are A, B, C, and D. We will measure the force of the charge that was applied to B (the charge that was applied in the upper right corner). All three forces acting on the charge in B are ones of rejection because all the charges are positive (of the same sign). Charge-related force in A will be given . Then the module in the x-direction can be given as,
Fₓ = K×q² / L²
Then the module in the y-direction can be given as, and Charge placed in C produces force.
Fy = K×q²/L²
Force as a result of the charge in D .The square's diagonal will determine the direction of that force, and the diagonal's length is determined by the distance between the charges placed in D and A.
d² = L² + L² = 2L²
d = √2 × L
Force as a result of the charge in D .The square's diagonal will determine the direction of that force, and the diagonal's length is determined by the distance between the charges placed in D and A.
F₄₅ = Kq²/ 2L²
Fx + Fy = F₁
F1's module: Fx²+ Fy² then, the direction will be same to the square's diagonal.
F₁ = √( Kq²/L² )² + ( Kq²/L² )²
F₁ = √2Kq²/L²
To obtain the net force Fr on charge in point B, we now sum forces F1 and F₄₅. Fr's direction is the diagonal's direction and it is a rejection-oriented direction is the module,
Fr = F₁ × F₄₅
Fr = √ 2Kq²/L² + Kq²/ 2L²
Fr = ( √ 2 + 0,5 )Kq² /L²
K = 9×10⁹ Nm²C²
Fr = 1.91 × 9×10⁹×q²/L²
The complete questions is,
Four charges having charge q are placed at the corners of a square with sides of length L. What is the magnitude of the force acting on any of the charges?
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If an object is rotating clockwise, this corresponds to a _____ angular velocity:
a- negative
b- positive
If an object is rotating clockwise, this corresponds to a negative angular velocity. The greater the rotation angle in a given amount of time, the greater the angular velocity. The units for angular velocity are radians per second (rad/s).
What is angular velocity?The time rate at which an object rotates, or revolves, about an axis, or at which the angular displacement between two bodies changes.
Is angular velocity a vector quantity?Yes, angular velocity is a vector quantity and has both a magnitude and a direction. The direction is the same as the angular displacement direction from which we defined the angular velocity.
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a motor develops 56,000 watts of power when its shaft turns at 300 rad/s. what is the torque on the shaft? group of answer choices it depends on the shaft diameter. 187 n-m. 30 n-m. 17,000 n-m.
group of answer choices it depends on the shaft diameter. 187 n-m. 30 n-m. 17,000 n-m.
According to the problem: The torque on the shaft is 17,000 N-m.
What is torque?Torque is a measure of rotational or twisting force on an object. It is the product of a force applied to an object and the distance, or lever arm, between the point of application of the force and the axis of rotation. Torque is a vector quantity, meaning it has both magnitude and direction. Mathematically, torque is represented as the cross product of the lever arm vector and the force vector. Torque is generated when a force is applied perpendicular to the lever arm, resulting in a rotational motion. This is most commonly observed when a force is applied to a wrench or screwdriver when tightening a bolt.
This is calculated using the equation Power = (2π x Torque x Speed) / 60, where Power is in Watts,
Torque is in N-m, and Speed is in Radians per second.
Rearranging the equation gives Torque = (Power x 60) / (2π x Speed).
Substituting the given values yields Torque = (56,000 x 60) / (2π x 300), which is equal to 17,000 N-m.
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kepler's three statements and newton's equation for gravitational attraction are called laws. where they ever theories? will they ever become theories
The three propositions of Kepler laws and Manning's equation explaining gravitational attraction are referred to as No A scientific principle is a declaration of events that have been repeatedly observed.
How do Newton's hypothesis of gravity connect to Kepler's laws?Newton applied Kepler's first law to the two-body dilemma to find his answer. He reasoned that a moving body's orbit must have a conic section because it moves when it is affected by the gravitational pull of another body. Elliptical orbits are seen on planets, satellites, and asteroids.
What are the three fundamental laws of gravitation?Laws refer to assertions and Brady's equation for gravitational attraction. theories, where they ever Are they ever going to be theories? If one of the objects' masses is increased, then the The gravitational pull between them is quadrupled. If one of the items triples in mass, the gravitational pull between them will also triple. The gravity force that exists on two objects is multiplied by two when their masses are each doubled, and so on.
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A bullet traveling horizontally losses 1/20th of its velocity while penetrating a wooden plank, how many sucj planks are required to stop the bullet?
Explanation:
if it is just defined as geometric sequence
an = an-1 × 0.8
then infinitely many. that way we will never reach 0 velocity. the sequence will go on in all eternity with the next velocity being 80% of the previous velocity. and 80% of that. and so on.
it will get closer and closer to 0 but never reach it.
under normal (natural, physical) circumstances we need a stop criteria, like the minimum velocity for a bullet to penetrate such a plank.
once we have that, we can calculate (initial velocity × 0.8^n < minimum velocity) after how many planks (n) the bullet reaches that velocity. and that gives us the number.
ampacity is an invisible force that can produce heat, motion, light, and many other physical effects.T/F
False. Ampacity is a measure of the maximum amount of electrical current a conductor or device can safely carry.
What is Ampacity?Ampacity is the maximum current a conductor or wire can handle without sustaining damage or significantly reducing its longevity. It is expressed in amperes, and is determined by the material composition, size, and temperature of the conductor. Electrical installations must adhere to the ampacity of the conductor to ensure that it does not exceed the maximum safe current. This is important to preventing dangerous electrical shorts and fires. The ampacity of any conductor should be verified using the appropriate industry standards or codes, such as the National Electrical Code.
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if equal masses of water and iron were exposed to the same heat source, which one would reach 100 c first
The water would reach 100°C first, as iron has a higher heat capacity than water.
This means that it takes more energy to increase the temperature of iron than it does to increase the temperature of water.
What is heat capacity?
Heat capacity is the amount of heat energy required to raise the temperature of an object by one degree.
It is measured in joules per degree Celsius (J/°C) and is a measure of the object's ability to store thermal energy.
Heat capacity is an important factor in determining the rate of temperature change of a system.
Therefore, The water would reach 100°C first, as iron has a higher heat capacity than water.
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a 1,500 kg satellite is in orbit around Earth at a distance of 1 Earth radius above the surface. Earth's mass is 5.97 x 10 ^24 kg, and its radius is 6.37 x 10^6 m
Calculate the magnitude of the gravitational force acting on the satellite.
The magnitude of the gravitational force acting on the satellite is 14,720.2 N.
What is the gravitational force acting on the satellite?
The gravitational force acting on the satellite is calculated by applying Newton's law of universal gravitation as follows.
Mathematically, the formula for the Newton's law of universal gravitation is given as;
Fg = ( Gm₁m₂ ) / ( r² )
where;
G is universal gravitation constantm₁ is mass of Earthm₂ is the mass of the satelliter is the distance between themFg = ( 6.67 x 10⁻¹¹ x 5.97 x 10²⁴ x 1500 ) / ( 6.37 x 10⁶ )²
Fg = 14,720.2 N
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if and objent with the mass to 100 kg and the lenght of 3.8 meters, a person weight 50 kg walks to the front to the boat how far did the boat travel
m = the object's mass; g = the local gravity (for example, the standard planet acceleration or f 0 = 9.80665ms-2) Weight of the Object. Enter the object's mass in this field.
What does Earth's gravity on average weigh?
gravitation on Earth. According to Newton's universal laws of gravitation, the gravitational force on Earth is the result (vector sum) of 2 factors: (a) the gravitational pull and (b) the gravitational forces.
Describe zero gravity.
all videos related to this post A description of gravity with an emphasis on zero gravity In mechanics, gravity—also known as gravitation—is the constant force of attraction that pulls all things together. By far, it is the
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A cat is stuck in the tree and the fire department needs a ladder to rescue the cat. The fire truck available has a 95-foot ladder, which starts 8 feet above ground. Unfortunately, the fire truck must park 75 feet away from the tree. If the cat is 60 feet up the tree, does the cat get rescued
The ladder is not long enough to reach the cat. The cat would not be rescued with the ladder available.
What does physics mean by displacement?The term "displacement" refers to a shift in an object's position. It is a vector quantity with a magnitude and direction. An arrow pointing from the starting point to the finishing point serves as its symbol.
What is referred to as displacement?When an atom or group of atoms in a molecule are replaced by another atom, this is referred to as a displacement reaction. For instance, copper metal is displaced when iron is added to a solution of copper sulphate.
To determine if the cat can be rescued using the 95-foot ladder, we need to calculate the reach of the ladder, which is the distance from the base of the ladder to the highest point it can reach.
The ladder starts 8 feet above ground, so the reach of the ladder is 95 feet (the length of the ladder) + 8 feet (the distance above ground) = 103 feet.
Now, we need to calculate the horizontal distance between the base of the ladder and the tree. This distance is the sum of the distance between the fire truck and the tree (75 feet) and the distance between the base of the ladder and the fire truck (8 feet).
So, the horizontal distance between the base of the ladder and the tree is 75 feet + 8 feet = 83 feet.
Now we have to check the reach of the ladder is greater than the horizontal distance between the base of the ladder and the cat and the height of the cat.
103 feet (reach of ladder) > 83 feet (horizontal distance) + 60 feet (height of cat)
103 > 143
which is not true.
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A point charge of magnitude q is at the center of a cube with sides of length L.Part A - What is the electric flux Φ through each of the six faces of the cube? Use ϵ0 for the permittivity of free space (not the EMF symbol E0).Part B - What would be the flux Φ1 through a face of the cube if its sides were of length L1? Use ϵ0 for the permittivity of free space.
The flux from the side of each face is [tex]\frac{q}{6a}[/tex] where a is the permittivity of free space.
The amount of the electric field flowing through a specific area is known as the electric flux. The quantity of field lines travelling through a specific area can be used to calculate the electric flux. The charge contained in a surface can be used to compute the electric flux through that surface.
For, a close gaussian surface,
electric flux is equal to charge divided by permittivity of free space.
Now, in the part A, consider that a length of the sides of cube is L and for each of the face the electric flux emerging out of the cube will be divided into six parts.
The number of field lines traveling across a given area is known as the electric flux. The flux moving through any one of the cube's faces is equal to the cube's overall flux divided by six.
so flux is [tex]\frac{q}{6a}[/tex] where a is permittivity of free space.
and for part B now the length is different but as we have seen that flux depends upon length it just depend upon charge and permittivity of free space which remains same even if the length get changes.
So, flux remains same.
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do you think that mechanical work had to be done to increase the separation of the plates? if so, how do you reconcile this with the fact that the energy stored decreased when you increased separation?
To separate the plates in a capacitor, they are charged with the opposite polarity. The stored charges on the capacitor drop as the plates separate as the capacitor's capacity to hold charges decreases.
What two kinds of mechanical job are there?Motion (kinetic energy) and stored mechanical energy are the two forms (potential energy). Our guide that describes potential and kinetic energy has further information. The amount of potential energy determines how mechanical conversion works.
Is manual labor always productive?The work is positive if an object is subjected to an applied force and moves in the same direction. If an object experiences force and then moves in the opposite direction,
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According to Table 1, which of the following materials is the best electrical conductor? Brass Copper Aluminum Nichrome
The resistivity of copper is less than the other materials. Copper is the best electrical conductor. Option (2) is correct.
The resistance is given by:
R = (ρL)/A
Let's assume the value of length (L) and area(A) is the same for all the given materials.
The resistance is directly proportional to the resistivity, therefore the more the resistivity the more resistance and less the good conductor.
The resistivity of copper is 1.724 x10⁻⁸
The resistivity of brass is 7.1 x 10⁻⁸
The resistivity of aluminum is 2.65 x 10⁻⁸
The resistivity of nichrome is 150 x 10⁻⁸
Hence, the resistivity of copper is less than the other materials. Copper is the best electrical conductor. Option (2) is correct.
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a small solid sphere is released from rest at the top of an inclined plane as shown. the sphere rolls down without slipping and reaches the bottom of the plane. how would the angular momentum of the sphere at the bottom of the plane change if the coefficient of static friction between the sphere and the plane were increased?
The angular momentum of the solid sphere would remain the same because the net torque would remain the same.
What is angular momentum?The attribute of any rotating object determined by the product of the moment of inertia and the angular velocity is known as angular momentum. It is a characteristic of rotating bodies determined by the sum of their moment of inertia and angular velocity.
What does motion's angular momentum mean?A body's rotational inertia and rotational velocity (measured in radians/sec) about a specific axis are combined to form angular momentum, which is a vector quantity (or more correctly, a pseudovector).
What does the vector form of angular momentum mean?An object's angular momentum is calculated by multiplying its moment of inertia by its rotating object's rotational velocity. A body's angular momentum has a magnitude and a direction. It is therefore a vector quantity. The letter "L" stands for it.
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If K.E. of an object moving with velocity 4 m/s is 72 J. Calculate mass of the object.
Answer:
m=9
Explanation:
[tex]k.E = \frac{1}{2}m {v}^{2} [/tex]
[tex]m = \frac{2k.E}{v}^{2} [/tex]
m=2(72)/(4)^2
m=144/16
m=9
