Two stationary point charges of unknown magnitude and sign are isolated from other charges. If electric field strength is zero at midpoint of line joining them, following can be concluded about charges : They are equal in magnitude but opposite in sign.
What is meant by electric field?The electric field is a vector field that describes the force experienced by a test charge placed in the field. The direction of the electric field is given by the direction of the force experienced by the test charge and its magnitude is given by the force experienced per unit charge.
Electric field at the point due to point charge ;
E = k * (q/r^2) * r_unit
where k is Coulomb's constant, q is the charge, r is the distance from the point charge, and r_unit is the unit vector pointing from the point charge to the point where the electric field is being calculated.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Two stationary point charges of unknown magnitude and sign are isolated from all other charges. if the electric field strength is zero at the midpoint of the line joining them, which of the following can be concluded about the charges?
They are equal in magnitude but opposite in sign.
They are equal in magnitude and sign.
They are not equal in magnitude and opposite in sign
They are not equal in magnitude but same sign.
from the following properties, select the properties that are not classified as an intensive property. (check all that apply.)
Temperature, density, color, electric current, heating value, as well as other characteristics are all intense attributes since they are unaffected by changes in the size or quantity of the substance.
What intense property examples are there?A property of that is intensive depends solely on the type of matter in a sample and not on the quantity. Examples of intense qualities include color, temperature, and solubility.
Which of the aforementioned traits are intense traits?intense qualities. The rate of electron passage in a conductor is known as electric current. Intensive qualities are those that exist regardless of the quantity of a substance or substances in the system.
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A coin rests on a book. The book is tilted until the coin just starts to slide. The angle at which the coin starts to slide is 30 degree. What is the coefficient of static friction between the coin and the book?
The coefficient of static friction between the book and the coin is the tangent of the angle of inclination. Hence, the coefficient is 6.4.
What is static friction ?Friction is the resistive force acting on an object. Static friction is the opposing force acting on a stationary object. It is always negative. The coefficient of friction is the ratio of frictional force to the normal force.
Here, the angle of inclination θ = 30°
The normal force acting in the x direction of the coin = Fx = Mg Sinθ
normal fore from y direction is = Fy = Mg cosθ
Now, frictional force Fs = μ Fx = Fy
then μ cos θ = sin θ.
Then, the coefficient of static friction μ = sin θ/cos θ
μ = tan 30 = 6.4 .
Therefore, the coefficient of static friction between the book and the coin is 6.4.
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a 42-n block is pulled along a horizontal surface by a force of 28-n as shown. what is the normal force on the block?
The normal force of a 42-N block when pulled along a horizontal surface by a force of 28-N is 411.6 N.
How will you calculate it.
The normal force is the force that acts perpendicular to the surface the object is on. In this case, the normal force is equal to the weight of the block, which is equal to the mass of the block multiplied by the acceleration due to gravity.
The weight of the block can be calculated using the formula: weight = mass * gravity
The mass of the block is 42 N, and the acceleration due to gravity is 9.8 m/s^2 (on earth)
So, the weight of the block is 42 N * 9.8 m/s^2 = 411.6 N
Therefore, the normal force of a 42-N block when pulled along a horizontal surface by a force of 28-N is 411.6 N.
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determine the greatest velocity obtained by this object (consider magnitude only in determining 'greatness'). (if negative, then enter a negative answer.))
The vector quantity velocity (v), denoted by the expression v = s/t, quantifies displacement (or motion, s), over change in time (t).
What is negative speed?Negative Velocity: If an object's position is shifting negatively as time passes, it has negative velocity. The airspeed is negative when any graph of displacement against time has a negative slope.
Why do velocity measurements range from positive to negative?Depending on the co - ordinate system used to define the position, the velocity's sign can change. A positive velocity merely indicates that a moving object is moving throughout the coordinate system's positive direction, whereas a negative velocity denotes that the item is going in the opposite direction.
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A lever with an effort arm of 10 meters and a load arm of 2 meters is used to lift an object weighing 220 Newtons to a height of 4 meters. If 400 joules of work is done, how much force must have been applied?
100 N
4000 N
1600 N
800 N
600 Joules of work is used to lift a box from the ground to a height of six meters. How much work would have been done if a lever would have been used with an effort arm of 12 meters and a load arm of 6 meters?
600 J
100 J
72 J
50 J
The work done by using a lever with an effort arm of 12 meters and a load arm of 6 meters is 72 Joules. The force must have applied is 1600 N.
what is the calculation of work done ?The work done (in Joules) = force x distance.In this case, the force is the weight of the box (F = m * g, where m is the mass of the box and g is the acceleration due to gravity) and the distance is the height of 6 meters.Since work done is 600 J,600 J = m * g * 6When a lever is used, the work done is given by the formula:work done = effort distance x effort force = load distance x load forceEffort arm = 12 m, load arm = 6 m, and effort force = load forceSo, effort distance = load distance / (effort arm/load arm) = 6/2 = 3mTherefore, the work done by using lever = 3m x effort force = 3m x load force = 3m x mg = 3mg3 = 72 JAnd now The work done (in Joules) = force x distance.In this case, the force is the weight of the object (F = m * g, where m is the mass of the object) and the distance is the height of 4 meters.Since work done is 400 J,400 J = force * 4And by using the lever, the work done is given by the formula:work done = effort distance x effort force = load distance x load forceEffort arm = 10 m, load arm = 2 m, and effort force = load forceSo, effort distance = load distance / (effort arm/load arm) = 4/5 = 0.8mTherefore, the effort force = work done / effort distance = 400J / 0.8m = 1600 NTo learn more about work done refer:
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Are bricks good conductors of heat
Answer:
A good brick should have a low thermal conductivity, allowing the house to be cool in the summer and warm in the winter. Hence, bricks are not good conductors of heat.
Explanation:
in a certain factory, assume that the number of workers is constant. the number of minutes n that it takes to make a single unit of a product and the number of units u of the product that are made per day satisfy the relationship u
As the number of minutes it takes to make a single unit of the product decreases, the number of units of the product that are made per day increases.
What is the relationship between the number of minutes it takes to make a single unit of a product?The number of units of the product that are made per day is inversely proportional to the number of minutes it takes to make a single unit of the product.As the number of minutes it takes to make a single unit of the product increases, the number of units of the product that are made per day decreases.Conversely, as the number of minutes it takes to make a single unit of the product decreases, the number of units of the product that are made per day increases.The constant 1440 represents the total number of minutes in a day, which is used to convert the minutes to units per day.Since the number of workers is constant, it can be assumed that the productivity of the factory is directly proportional to the number of units produced per day.The relationship between the number of minutes (n) it takes to make a single unit of a product and the number of units (u) of the product that are made per day is given as u = 1440/n.As the number of minutes it takes to make a single unit of the product increases, the number of units of the product that are made per day decreases.As the number of minutes it takes to make a single unit of the product decreases, the number of units of the product that are made per day increases.The constant 1440 represents the total number of minutes in a day, which is used to convert the minutes to units per day.The productivity of the factory is directly proportional to the number of units produced per day.To learn more about single unit of product refer:
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a 2kg object is moving in along the x-axis under a single conservative force. when the object is at position x?
The particle comes to rest before reaching the position x=4m.
What is the direction of F(x) at this position?The connection between the potential energy function U(x) and the conservative force F(x) is given by Eq.:F(x)=−dU/dx.
A positive slope of U(x) at a point means that F(x) is negative, and vice versa.
The force at x=2.0m is
[tex]$\mathrm{F}=-\frac{\mathrm{dU}}{\mathrm{dx}} \approx-\frac{\Delta \mathrm{U}}{\Delta \mathrm{x}}=-\frac{\mathrm{U}(\mathrm{x}=4 \mathrm{~m})-\mathrm{U}(\mathrm{x}=1 \mathrm{~m})}{4.0 \mathrm{~m}-1.0 \mathrm{~m}}$[/tex]
[tex]$=-\frac{-(17.5 \mathrm{~J})-(-2.8 \mathrm{~J})}{4.0 \mathrm{~m}-1.0 \mathrm{~m}}=4.9 \mathrm{~N}$[/tex]
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PART ONE
A student sits on a rotating stool holding two 5 kg objects. When his arms are extended horizontally, the objects are 0.7 m from the axis of rotation, and he rotates with angular speed of 0.75 rad/sec. The moment of inertia of the student plus the stool is 3 kg m² and is assumed to be constant. The student then pulls the objects horizontally to a radius 0.31 m from the rotation axis.
Calculate the final angular speed of the
student.
Answer in units of rad/s.
PART TWO
Calculate the change in kinetic energy of the system.
Answer in units of J.
Answer:
a) 1.05rad/s
b) 1.38J
Explanation:
When the ___________ is used too hard or too quickly, weight moves to the rear of the car causing the hood to rise and the rear of the vehicle to drop.O AcceleratorO Understeer
O Oversteer
O Evasive steering
Consider the following state vectors: a) Normalize each state vector. b) For each state vector, calculate the probability that the spin component is up or down along each of the three Cartesian axes. Use bra-ket notation for the entire calculation. c) Write each normalized state in matrix notation. d) Repeat part (b) using matrix notation for the entire calculation.
We have used the state-vector notation established with in Representing Qubit Environments section to express the state of our qubits throughout the bulk of Qiskit textbook.
A Qubit sector is what is it?A qubit quantum bit is the fundamental building block containing information in quantum computing, much as a binary bit is in regular traditional computing. New discoveries in health, economics, environmental systems, advanced materials, and other fields are being sparked by quantum computing.
A Qiskit testbook: what is it?With Qiskit, users may conduct experiments at home using cutting-edge quantum devices. That experimental quantum theory that underpins quantum computing is also taught in the textbook. It offers resources for developing, modifying, and executing quantum applications on
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Newton horizontal force is exerted upon a 3.1-kg box to move it across a level surface at a constant velocity of 1.4 m/s. The force of friction encountered by the box is Newton. O 47 O 105 O 4.84 O 147
Newton horizontal force is exerted upon a 3.1-kg box to move it across a level surface at a constant velocity of 1.4 m/s. The force of friction encountered by the box is 4.84N.
Explain force of friction?
Friction is a force that resists the movement of two objects that are in contact with each other. Friction is a force that can be beneficial or detrimental depending on the situation.
In most cases, friction is beneficial because it allows us to move and use things more easily. For example, friction allows us to walk on a surface without slipping, and it also helps us grip objects.Without friction, we would be unable to perform actions like writing or holding a cup of coffee.When two surfaces come into contact, friction is produced. The amount of friction between two surfaces is determined by the type of surface, the amount of force applied, and the amount of contact between the two surfaces.The rougher the surface, the more friction will be generated. The more force applied, the stronger the friction will be. Finally, the larger the area of contact between the two surfaces, the greater the friction will be.Friction can be beneficial or detrimental, depending on the situation. In some cases, friction can be beneficial and help us move and use things more easily.In other cases, it can be detrimental and cause unwanted resistance. It is important to consider the effects of friction when designing objects and performing activities.Now,
F = ma
F = 3.1 kg * 1.4 m/s^2
F = 4.84 N
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scattering find the direction of the reflected and transmitted beam and probabilites of reflection and transmission
In Scattering phenomenon, can apply Snell's Law to find direction and use concept of refraction index and angle of incidence to find probabilities.
Scattering refers to the phenomenon where a beam of particles or waves encounters an obstacle and is redirected in different directions. The direction of the reflected and transmitted beams, as well as the probabilities of reflection and transmission, depend on the properties of the obstacle and the incident beam.
When a beam of particles or waves encounters an obstacle, it can be reflected, transmitted, or absorbed by the obstacle. The probability of reflection is given by the reflectivity of the obstacle, which depends on the properties of the incident beam and the obstacle. The probability of transmission is given by the transmissivity of the obstacle, which also depends on the properties of the incident beam and the obstacle.
The direction of the reflected beam is determined by the law of reflection, which states that the angle of incidence is equal to the angle of reflection. The direction of the transmitted beam depends on the refractive index of the material the obstacle is made of, and the angle of incidence.
For a beam of waves, the probability of reflection and transmission can be determined by the reflectivity and transmissivity of the obstacle, which are related to the indices of refraction of the two media and the angle of incidence. The direction of the reflected and transmitted beams can be found by applying Snell's law, which relates the angle of incidence and the angle of refraction to the indices of refraction of the two media.
In summary, the direction of the reflected and transmitted beams and the probabilities of reflection and transmission depend on the properties of the incident beam and the obstacle, and can be determined using the laws of reflection and refraction.
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A truck moving at 8.33 m/s accelerates at a constant rate of 42.0 m/s2 for 5.60 seconds. The truck has a final velocity of (2 points)
226 m/s
234 m/s
244 m/s
245 m/s
261 m/s
Please be 100% sure
Answer:244 m/s
Explanation: Vf= Vi+a.t
Vf= 8.33+(42 x 5.6)
Vf=243.53 m/s
A proton, moving with a velocity of v i
i
^
, collides elastically with another proton that is initially at rest.Assuming that the two protons have equal speeds after the collision, find
the direction of the velocity vectors after the collision.
45 degrees is the same as collision C 1, which is also the same as CO 2 C 2.
What is the direction of the velocity ?The initial velocity of mass is equal to M p, which is equal to we won, which is equal to zero. M P B one F, then. Np VF two sides C two are equivalent to sign C one. Go to sci-fi two and view what has to be seen after society one. Therefore, when we plug in the numbers, we get 0.5 M P V and 0.5 mm PB squares plus we get a square of f. So I'm a square.The third is that. Consequently, the first one used third. Now, by adding the value of, we succeeded. We went by square cause to see what does cause you to, so square root two is equal to cost me with Miss Cassie two is equal to two expensive one. We have everyone equal to that. He desired to go to one via square root, which is why. 45 degrees is the same as C 1, which is also the same as CO 2 C 2. And by using the square root, we have physical to me. The answer to component A of the question is C1, which is 45 degrees.To learn more about initial velocity refer to:
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in each case below an arrow has been shot from the top of a building either up at a 45 degree angle straight out horizontally or down at a 45 degree angle all arrow are identiical and are shot at the same speed
The kinetic energy and speed of arrows that have the most potential energy at the beginning are the highest at the end.
As a result, the order is C = F > A = E > B = D.
Potential energy is stored energy that is affected by the relative location of various components in a system. When a spring is squeezed or extended, its potential energy increases. A steel ball has higher potential energy when lifted above ground than when it falls to Earth. It can do more work in the elevated position. Potential energy is a property of a system, not an individual substance or particle; for example, the system made of Earth and the elevated ball has greater potential energy as the two are separated.
Potential energy is created in systems having pieces that exert forces on each other with varying magnitudes depending on the arrangement.
Correct question is:
Attached as a image with diagram
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A satellite is following an elliptical orbit around earth. Its engines are capable of providing a one time impulse of a fixed magnitude. In order to maximize energy of satellite the impulse should be given
A Along satellite’s velocity when satellite is at perigee
B Along satellite’s velocity when satellite is at apogee
C Away from earth, when satellite is at perigee
D Away from earth, when satellite is at apogee
A satellite following an elliptical orbit around Earth will have different velocities at different points in its orbit, specifically at its perigee (the point in its orbit where it is closest to Earth) and at its apogee (the point in its orbit where it is farthest from Earth).
What to do to maximize the energy of satellite?To maximize the energy of the satellite, the impulse should be given in a specific direction.Here are the main points:A satellite in an elliptical orbit around Earth will have different velocities at its perigee and apogee.To maximize the energy of the satellite, the impulse should be given in a specific direction:Along the satellite's velocity when satellite is at perigee (Option A)This will increase the energy of the satellite and raise its orbit.It is the best option as the perigee is the closest point to earth where the gravitational potential energy is minimum thus providing the highest change in potential energy.Impulse away from Earth when the satellite is at perigee(Option C) is not the best option as it will decrease the energy of the satellite, lowering its orbit.To learn more about satellite refer:
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The diagram shows four pairs of large parallel conducting plates. The value of the electric potential is given for each plate. Rank the pairs according to the magnitude of the electric field between the plates, least to greatest
The magnitude of the electric field between the plates, from least to greatest is shown by option C.
What is the ranking?We know that when two plates that are conducting are arranged in such a way that a gap is left in between them, the we have a capacitor. The electric potential of the capacitor would have a lot to do with the distance of the separation of the plates.
As such, the closer the plates are together, the greater the electric potential of the plates and the more the plates are apart, the lesser the electric potential of the plates.
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A car starts from rest and accelerates at a constant rate in a straight line. In the first second the car moves a distance of 2.0 meters. How much additional distance will the car move during the second second of its motion?
Since the car is accelerating at a constant rate, the distance it travels during each second of its motion will be directly proportional to the time it has been accelerating.
In the first second, the car moved a distance of 2 meters, and in the second second, it will move twice the distance of the first second, so the car will move additional distance of 2*2 = 4 meters during the second second of its motion.
The distance traveled during the second second of its motion is 1/2 * 2 = 1 meters.
A car that accelerates at a constant rate will move a distance equal to the initial velocity multiplied by time plus 1/2 the acceleration multiplied by the square of time. Since the car starts from rest, the initial velocity is zero.
Therefore, the distance traveled during the second second is 1/2 * acceleration [tex]* (time)^2 = 1/2 * a * t^2 = 1/2 * a * 1^2 = 1/2 * a[/tex] Since the car moved 2.0 meters in the first second, it means the acceleration is[tex]2m/s^2[/tex], and the distance traveled during the second second is 1/2 * 2 = 1 meters.
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What three requirements must be satisfied to initiate and sustain combustion?1. A fuel must be present2. Oxygen must be available in a big enough quality to combine with fuel3. Heat must be applied to initiate the combustion, sufficient heat must generated to sustain the reaction
To start and maintain combustion, three conditions must be met: heat, fuel, and oxygen.
What is the straightforward meaning of combustion?a chemical interaction between different compounds, generally including oxygen, that produces heat in the kind of flames. burning coal or wood of any type to heat our home. Buses and cars utilize gasoline or diesel to operate. Your cooktop is powered by natural gas or LPG. The burning of these gases facilitates cooking.
Why does anything burn?To sum up, three elements must be present for combustion to take place: a fuel to be destroyed, a source of carbon, and a sources of heat. Combustion results in the production of exhausts and the release of heat.
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If the boat is going upstream against a current that has a force of 250 N against the motion of the boat, find the acceleration of the boat if there is a forward force of 360 N from the fan. (Remember that the mass of the boat is 220 kg.)
The acceleration of the boat if there is a forward force of 360 N from the fan is calculated as : 0.05 m/s^2.
What is Newton's second law of motion?Newton's second law of motion states that net force acting on object is equal to mass of the object multiplied by acceleration. Net force acting on the boat is sum of the force from the fan and the force of the current against the motion of the boat.
As, Net force = ma
Given, m is the mass of the boat (220 kg)
Net force = ma = (360 N) - (250 N) = 110 N
a = Net force/m = 110 N/ 220 kg = 0.05 m/s^2
So, acceleration of the boat is 0.05 m/s^2
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Based on the Potential Energy vs Position graph, which of the points are:a) in stable equilibriumb) in unstable equilibriumc) in neutral equilibriumd) not in equilibriume) turning points
a) Points "B" and "E" are in stable equilibrium.
b) In this curve , points A and C are in unstable equilibrium.
c) There is no point which in neutral equilibrium.
What is equilibrium?When a system is in equilibrium, neither its internal energy state nor its state of motion tend to change over time. A simple mechanical body is said to be in equilibrium if it neither experiences linear acceleration nor angular acceleration; unless it is disturbed by an external force, it will remain in that state indefinitely. If all of the forces acting on a single particle are vector summated to zero, equilibrium results.
a)
Stable equilibrium point is surrounded by points of higher potential energy.
Points "B" and "E" are in stable equilibrium.
b)
Unstable equilibrium point is surrounded by points of lower potential energy.
In this curve , points A and C are in unstable equilibrium.
c)
Neutral Equilibrium Point : This point is surrounded by points of same potential energy.
There is no point which in neutral equilibrium.
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Complete question:
Two toy cars with different masses originally at rest are pushed apart by a spring between them. Which of the following statements would be true? Select two answers. (A) both toy cars will acquire equal but opposite momenta (B) both toy cars will acquire equal kinetic energies (C) the more massive toy car will acquire the least speed (D) the smaller toy car will experience an acceleration of the greatest magnitude
The answers are A)and B) both toy cars will acquire equal but opposite momenta and both toy cars will acquire equal kinetic energies
What is the rationale behind Newton's law?There is an equal and opposite reaction to every action, according to Newton's third law of motion. So, when a spring pushes the two toy cars apart, the force exerted on each car will be equal in magnitude but opposite in direction. Since force is equal to the rate of change of momentum, the two cars will acquire equal but opposite momenta.The kinetic energy of an object is given by the equation KE = 1/2 * m * v^2, where m is the mass of the object and v is its speed. Since the two toy cars have different masses, they will not acquire the same kinetic energy.To learn more about newtons law refer:
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a wire with mass 45.0 g is stretched so that its ends are tied down at points a distance 75.0 cm apart. the wire vibrates in its fundamental mode with frequency 64.0 hz and with an amplitude at the antinodes of 0.320 cm. for related problemsolving tips and strategies, you may want to view a video tutor solution of
The wire is stretched and tied down at points 75.0 cm apart, and it vibrates in its fundamental mode with a frequency of 64.0 Hz and an amplitude of 0.320 cm at the anti nodes is 259200.0 g cm/s².
How to calculate wavelength?From this information, we can use the following equations to calculate the wavelength, velocity, and tension of the wire:
Wavelength: λ = 2L/n, where L is the distance between the fixed points and n is the number of anti nodes (in this case, n = 1 for the fundamental mode). Therefore, λ = 2(75.0 cm)/1 = 150.0 cm.
Velocity: v = fλ, where f is the frequency and λ is the wavelength. Therefore, v = 64.0 Hz x 150.0 cm = 9600.0 cm/s.
Tension: T = (mv²)/λ, where m is the mass of the wire and v is the velocity. Therefore, T = (45.0 g x 9600.0 cm/s²)/150.0 cm = 259200.0 g cm/s².
It is important to note that the above calculations are based on the assumption that the wire behaves as a simple harmonic oscillator, meaning that it oscillates with a constant amplitude and frequency.
Additionally, it is also important to note that the tension in the wire is what causes the wire to oscillate, and it is also what allows the wire to transmit sound waves.
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A pendulum bob is released from some ini-
tial height such that the speed of the bob at
the bottom of the swing is 3.0 m/s.
The acceleration of gravity is 9.81 m/s².
What is the initial height of the bob?
A bob is the mass on the end of a pendulum found most commonly, but not exclusively, in pendulum clocks.
What is a bob on a pendulum?
A basic pendulum consists of a light, flexible, inextensible thread with a heavy but tiny item, known as a "bob," at one end. Graph: Pendulum clocks employ it. It's used to calculate the acceleration caused by gravity.
Clock pendulums are typically composed of a weight or bob attached to the bottom end of a rod, with the top linked to a pivot so it can swing, despite the fact that a pendulum's shape or any rigid item hanging on a pivot is theoretically possible.
The benefit of this design is that it places the centre of mass farthest from the pivot, nearer to the actual end of the pendulum. This reduces the length of the pendulum needed for a specific period and increases moment of inertia.
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Two stones are thrown vertically upward from the ground, one with three times the initial speed of the other. Assume free fall.
A)If the faster stone takes 11.0s to return to the ground, how long will it take the slower stone to return?
B)If the slower stone reaches a maximum height of , how high (in terms of ) will the faster stone go?
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.70 ms2. At the same instant, a truck, traveling with a constant speed of 14.7m/s , overtakes and passes the automobile.
How far beyond its starting point does the automobile overtake the truck?
How fast is the automobile traveling when it overtakes the truck?
In two stones thrown vertically upward problem, it will take the slower stone 3.67 seconds to return and faster to go 303.6 m high. In vehicles overtaking problem, automobile overtakes the truck 60.16m beyond, and is traveling at 14.7m/s when it overtakes the truck.
Two stones thrown vertically upward problem:
A) To solve this problem we need to use the equation of motion for free fall under gravity: h = -1/2 gt^2 + vt + h0, where h is the height of the stone, g is the acceleration due to gravity, t is the time, and h0 is the initial height. Since we know that the stone is thrown vertically upward from the ground, the initial height h0 is 0.
We also know that the stone is in free fall, so the velocity v is 0 and the final height h is also 0.
We can use this information to find the time it takes for the faster stone to return to the ground:
h = -1/2 gt^2 => 0 = -1/2 (9.8 m/s^2) t^2 => t = √(2h/g) => t = √(2*0/9.8) => t = 0
Now, we know that the faster stone takes 11.0s to return to the ground, and that the faster stone has 3 times the initial speed of the slower stone.
So, the slower stone will take (11.0s/3) = 3.67s to return to the ground.
B) If the slower stone reaches a maximum height of h, then the faster stone will go 3h high.
We can use the equation of motion for free fall under gravity to find the maximum height of the slower stone:
h = -1/2 gt^2 + vt + h0 => 0 = -1/2 gt^2 + 0 + 0 => h = -1/2 gt^2 => h = -1/2 (9.8 m/s^2) (3.67 s)^2 => h = -1/2 (9.8 m/s^2) (13.41 s^2) => h = -1/2 (9.8 m/s^2) (13.41 s^2) => h = -101.2 m
So, the faster stone will go 3*101.2 m = 303.6 m high.
Automobile and truck problem:
We can use the equations of motion for constant acceleration.
First, we need to find the time it takes for the automobile to overtake the truck. We can use the equation: v = u + at, where v is the final velocity, u is the initial velocity (0 m/s for the automobile), a is the acceleration (2.7 m/s^2) and t is the time.
So, v = 0 + 2.7t
Next, we can use the equation of motion for relative motion: v = v_t - v_a, where v_t is the velocity of the truck and v_a is the velocity of the automobile. So, v = 14.7 - 2.7t
We can now set the two equations equal to each other: 14.7 = 2.7t. So, t = 5.44 seconds.
To find the distance the automobile travels before overtaking the truck, we can use the equation: s = ut + (1/2)at^2. Plugging in the known values, s = (1/2) (2.7 m/s^2) (5.44 s)^2 = 60.16 m
To find the velocity of the automobile when it overtakes the truck, we can use the equation: v = u + at. Plugging in the known values, v = 0 + 2.7 (5.44 s) = 14.7 m/s
So, the automobile overtakes the truck 60.16m beyond its starting point and the automobile is traveling at 14.7m/s when it overtakes the truck.
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If a two-body collision is not head-on, then which of the following is always true?
a. Momentum is conserved,
b. Kinetic Energy is conserved,
c. Neither a nor b is true,
d. That a is true and b is not true,
e. That b is true and a is not true.
Momentum is always conserved when two separate objects collide. Only elastic collisions preserve kinetic energy.
Momentum is never preserved when two bodies meet, correct?Momentum is conserved for any collision in an isolated system. Before and after the collision, the collection of items in the system had an equal amount of total momentum.
Which of the following summaries best describes the collision theory?According to the collision theory, for a reaction to take place, there must be interactions between different molecules. It's not necessary for every molecular collisions to result in a product. Only when the chemical reactions have energy over the threshold energy will the product develop.
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“We are observing wasted heat in everyday life for example in Pakistan heavy generated are installed, during their supply of electricity an excessive amount of wasted heat is produced in its surrounding, similarly when we drive a vehicle a heat is available in the surrounding of engine of that vehicle, we can also see many more such examples of wastage of heat. This heat is effecting the environment of Pakistan badly.
Is it conceivable to convert this wasted heat into some useful work/energy/electricity or not. If yes how? If no why
Yes, it is possible to convert wasted heat into useful work, energy, or electricity using a device called a thermoelectric generator (TEG), etc.
What are ways to convert wasted heat into useful work?TEGs work by using the difference in temperature between two sides of the device to generate electricity. This process is known as the Seebeck effect. TEGs have been used to convert the wasted heat from car engines and industrial processes into electricity, for example.
Another way of converting wasted heat into electricity is using Organic Rankine Cycle (ORC) which is similar to the Rankine Cycle used in traditional power plants, but it uses an organic fluid with a lower boiling point. This allows for the use of lower temperature heat sources, such as industrial waste heat or solar thermal energy, to generate electricity.
Additionally, the use of waste heat recovery system (WHRS) can also be used to recover heat from industrial processes, power generation, and other sources, and convert it into electricity.
So yes, it is possible to convert wasted heat into useful energy, and various methods have been developed to do so, it is just a matter of cost-effectiveness and practicality in the specific case of Pakistan.
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when the switch is closed, rank the bulbs in order from brightest to dimmest. select all that apply 1. a > b
a > b when the switch is closed, rank the bulbs in order from brightest to dimmest.
What factors influence bulb's brightness?The power of a lightbulb determines its brightness. Because P = I2R, brightness is proportional to current and resistance. The resistance is the same if the bulbs are similar.
They might not, however, feel the same current.
Both bulbs will have the same voltage across them as the battery when connected in parallel. In a series connection, however, the voltage is split between the two bulbs. As a result, the lights linked in parallel will glow brighter.
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PLS HELP 1. Analyze Image A. What do you notice about the temperature (energy) of our planet over the last 500 million years? What role do these changes in energy (temperature) play in the climate changes you learned about in Mission 1: Ellesmere Island?
2. Analyzing Image A. Consider the concepts learned in the 1/24/22 CC and the data gathered during the simulation. What evidence (proof) is there that humans are causing Earth’s drastic spike in temperature affecting our climate and biomes rather than the Earth following its normal cycle? (NOTE: You must specifically state proof from the CC AND the simulation to support your point of view)
The answers include the following:
The role these changes in energy (temperature) play in the climate changes is that it leads to a rising sea level and unpredictable weather patterns.The evidence there that humans are causing Earth’s drastic spike in temperature affecting our climate and biomes rather than the Earth following its normal cycle is as a result of the increase in the emission of greenhouse gases causing it.What is Climate change?This is referred to as long-term shifts in temperatures and weather patterns and is caused by factors.
They include the emission of greenhouse gases such as carbon dioxide due to burning of fossil fuel which is associated with technological advances.
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