minimum time interval to stop should be = 0.08 seconds whereas the friction minimum stopping distance = 0.64 m.
Which four forms of friction are there?
The force that prevents one solid item from moving across another is known as friction. Static friction, sliding friction, rolling friction, and fluid friction are the four main categories of friction.
What is frictional force, exactly?
Two surfaces that come into contact and glide against one another produce frictional force. The following variables impact the frictional force: Surface roughness and the amount of force pressing them together have the biggest an impact on these forces.
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a capacitor of capacitance c0 is fully charged by a battery of voltage v0, then disconnected from the battery. how much work is required to pull the plates of the charged capacitor apart to three times their original separation?
The amount of work required to pull the plates of the charged capacitor apart to three times their original separation is equal to the change in electrical potential energy between the initial and final states,or (c0)(3v0)^2.
What is the capacitor ?
A capacitor is an electrical component that stores energy in an electric field and is often used to regulate voltage in a circuit. It consists of two conductive plates separated by a dielectric material. When a voltage is applied to the capacitor, the electric field created around the plates stores energy. When the voltage is removed, the capacitor can discharge the stored energy. Capacitors are used in a wide range of electronic applications, such as filtering signals, storing energy, and providing a timing reference. They can also be used to smooth out power surges or provide a reserve of energy when a sudden increase in current is required.
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About how much of the solar energy that reaches earth’s atmosphere is absorbed by the atmosphere?
"About three-fourth's of the solar energy that reaches earth’s atmosphere is absorbed by the atmosphere."
Solar energy is defined as the energy produced by the sun and is the major source of energy on earth. The ecosystem's plants benefit from it. The solar energy is absorbed by the atmosphere through compounds such as, water vapour, dust, ozone. These substances absorb about 71 percent of the solar energy which is approximately equivalent to three-fourths of it.
In total approximately 71% of incoming radiation is absorbed by the atmosphere and the Earth's surface while around 29% is reflected back to space and does not heat the surface.
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two parallel long, straight wires are 0.0040 m apart and carry currents of 5.0 a and 10 a, respectively. determine the net magnetic field midway between the wires. take b as positive if it is going into the page. group of answer choices 5.0 x 10-4 t -1.0 x 10-3 t 1.0 x 10-3 t -5.0 x 10-4 t
The net magnetic field midway between the wires is 0.16 mT
What is a magnetic field?The area around with a magnet in which the properties of magnetism are felt is known as the magnetic field. To explain how the magnetic force is dispersed in the area around and inside anything electromagnetic in nature, we utilize the magnetism as a tool.
Given ,
I(1)=3A
I(2)=5A
Wkt
B= µ0I/2πr
B(1) = µ0I(1)/2πr(1)
= 4π×10^-7×3A/2π(0.25)×10^-2
=2.4×10^-4 T
B(2) = µ0I(2)/2πr(2)
=4π×10^-7×5A/2π(0.25)×10^-2
=4×10^-4 T
B(net) = (4×10^-4)
= 0.16mT
direction paralel to the wire
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A golfer uses a club to hit a 45-g golf ball resting on an elevated tee, so that the golf ball leaves the tee at a horizontal speed of 38 m/s.
a.What is the impulse on the golf ball?
b. What is the average force that the club exerts on the golf ball if they are in contact for 2.0´103 s?
c. What average force does the golf ball exert on the club during this time interval?
The impulse of the golf ball is 1.7 kg.m/s. The average force that the club exerts on the golf ball is 855 N and the average force that the golf ball exerts on the club is -855 N.
What are the two terms that best sum up a force?A vector quantity is force. Its amplitude and the way it acts are two characteristics that might be used to characterize it.
The mass of the ball m = 45 g = 45 · 10⁻³ kg
Initial velocity V = 38 m/s
Contact time t = 2 · 10⁻³ s
The impulse is calculated according to the formula:
I = m · V = 45 · 10⁻³ · 38 = 1,710 · 10⁻³ = 1.71 kg m/s
I = 1.71 kg m/s
The average force is calculated according to the formula:
F = ΔI / Δt = 1.71 / (2 · 10⁻³) = 855 N
F = ΔI / Δt = 1.71 / (2 · 10⁻³) = 855 N
F = 855 N
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ILL GIVE BRAINLIST FOR SHOWING WORK!!
The description of the motion and the gravitational potential energy of the particles are as follows;
26. (2) Energy
27. (4) Work
28. (3) Energy kg·m²/s²
29. (2) Joule
30. (4) a 6.0-kg mass 5.0 m above the floor
31. (3) Gravitational potential energy remain the same and speed decreases
32. (2) B
33. About 9.81 Joules
34. Option (1)
35. (4) The gain is the same along all paths
36. (2) Speed decreases and the gravitational potential energy increases
What is the gravitational potential energy?Gravitational potential energy is the energy a body posses due to its relative posirtion.
26. A scalar quantity is a quantity that has only magnitude but no direction.
The quantity that has only magnitude is energy.
The correct option is (2) Energy
27. Energy is the ability to do work, therefore, work has the same unit as energy. The correct option is therefore;
(4) Work
28. Energy = Force × Distance
Force = Mass × Acceleration
The unit of force is therefore; kg·m/s²
The unit of energy is therefore; m × kg·m/s² = kg·m²/s²
The correct option is; (3) Energy; kg·m²/s²29. Gravitational potential energy, is a form of energy due to elevation, therefore, the unit is the Joule
The correct option is; (2) Joule
30. Gravitational potential energy can be found using the formula;
P.E. = m·g·h
Where;
m = The mass
g = The acceleration due to gravity
h = The height
The greatest gravitational potential is therefore;
6.0 kg × 9.81 m/s² × 5.0 m
The correct option is therefore;
(4) a 6.0-kg mass 5.0 m above the floor31. The rough horizontal surface decreases the speed. The elevation of the horizontal surface is constant, therefore, the gravitational potential energy remains the same.
The correct option is therefore;
(3) Gravitational potential energy remains the same and speed decreases
32. The gravitational potential energy of the cart is least at the lowest point.
The correct option is; (2) B
33. The gravitational energy with respect to Earth is found as follows;
5.00 kg × 2.00 m × 9.81 ² = 98.1 Joules
34. The equation for the gravitational potential energy is; P.E. = m·g·h
Therefore, P.E. is directly proportional to the distance above the Earth and graph is a straight line passing through the origin
Option (1) is correct
35. The change in elevation is the same for all 5. The correct option therefore is option (4)
(4) The gain is the same along all paths.
36. The speed of the ball decreases when it is thrown upwards, while the gravitational potential energy increases as the height increases, therefore;
(2) Speed decreases and the gravitational potemntial energy increases
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The flux is unchanged becauYou hold a wire coil so that the plane of the coil is perpendicular to a magnetic field B⃗ .
a)If the magnitude of B⃗ increases while its direction remains unchanged, how will the magnetic flux through the coil change?
se the position of the coil with respect to B is unchanged l The flux increases because the magnitude of B increases The flux decreases because the magnitude of B increases The flux is unchanged because the surface area of the co is unchanged
The magnitude of b increases, which is the correct response, so the flux increases.
When does magnetic flux differ from magnetic field?In contrast to magnetic field, which is the region in space where the magnetic effect of the field is observed, magnetic flux is a measure of the amount of magnetic field passing through a given area. A moving charged particle creates a magnetic field that can exert a magnetic force.
ФB = BAcosθ
The magnetic flux is actually given by where B is the magnetic field's strength, A is the coil's circumference, and is the angle formed by the direction of B and the area A's perpendicular.
We can see that since B's intensity is increasing while its direction is staying the same in the problem, the magnetic flux is also increasing.
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Two 2.70 cm × 2.70 cm plates that form a parallel-plate capacitor are charged to ± 0.708 nC .Part AWhat is the electric field strength inside the capacitor if the spacing between the plates is 1.20 mm? E = ...?Part BWhat is potential difference across the capacitor if the spacing between the plates is 1.20 mm? V = ... ?Part CWhat is the electric field strength inside the capacitor if the spacing between the plates is 2.40 mm? E = ...?Part DWhat is the potential difference across the capacitor if the spacing between the plates is 240 mm?V = ...?
The electric field strength inside the capacitor does not depend on the distance between plates. Hence, Potential difference and Electric field strength is -130V and -1.09 x 10^5 V/m respectively.
What does "permittivity of open space" mean?The ability of electrical fields to pass through a conventional vacuum is represented by the physical constant known as the permittivity of free space. The constant has a relative standard uncertainty of 1.5 x 10-10 and is equal to around 8.854 x 10-12 F/m (farad per metre).
Q= charge => ± 0.708 nC
E => electric field strength = Q/Aεο
A=> area of plates 2.7 x 2.7 cm2.
εο = > 8.854 x 10-12 F/m.
E= -0.708 x10^-9/ (2.7x2.7 x 8.854 x 10^-4 x 10^-12)
= -1.09 x 10^5 V/m.
Potential difference = Ed => -1.09 x 10^5x 1.2x 10^-3 => -1.30x 10^2V
=> -130V.
How strong is the electric field?The intensity of an electric field at a specific location is expressed quantitatively as "electric field strength." The volt per metre (V/m or Vm-1) is the common unit.
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Are the data from this experiment alone sufficient to conclude that the allele for smooth seeds is dominant over the allele for wrinkled seeds?
If Mendel knew that the allele for smooth (R) seeds was dominant over the allele for wrinkled (r) seeds, and the cross was Rr × rr, the middle column of the Punnett square would be filled with all Rr, because R is dominant over r.
If Mendel knew that the allele for smooth (R) seeds was dominant over the allele for wrinkled (r) seeds, and the cross was Rr × rr, the numbers that would fill the middle column of the Punnett square would be all Rr because the dominant allele R masks the recessive allele r.
The Punnett square for this cross would look like this:
R r
r Rr
r Rr
Each box in the middle column represents the genotype of an individual offspring produced by the cross, and since R is dominant over r, the genotype of all the offspring will be Rr, which results in a smooth seeds phenotype.
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Five loops are formed of copper wire of the same gauge (cross-sectional area). Loops 1-4 are identical; Loop 5 has the same height as others but is longer. At the instant shown, all the loops are moving at the same speed in the directions indicated.There is a uniform magnetic field pointing out of the page in region I; in Region II there is no magnetic field. Ignore any interactions between the loops.A) For any loop that has an induced current, indicate the direction of the current.B) Rank the magnitude of the emfs around the loops. Explain your reasoning.C) Rank the magnitudes of the currents in the loops. Explain your reasoning.
E1=E4>E5>E2=E3 is the correct order of magnitudes induced in the loop. Region I has a magnetic field that is neither uniform nor steady and points out of the page. Disregard any communication between loops.
What in physics are magnitudes?In terms of physics, magnitude is just "distance or quantity." In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope .In physics, the term "magnitude" often refers to a size or amount.
What is an example of magnitude?The definition of magnitude is "how much of a quantity." The magnitude, for instance, can be utilized to explain the contrast between the speeds of a car and a bicycle.
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in the sequence of steps in which a black hole is formed, a supernova occurs during the first two steps T/F
In the sequence of steps in which a black hole is formed, a supernova occurs during the first two steps this statement is false.
What is a black hole?Even light cannot escape from a black hole because of its intense gravitational pull. Gravity is quite strong because there is so much packed into a small space. This could happen when a star is dying. Since light cannot escape black holes, they are invisible to humans.
How does a black hole develop?In the initial phase of the inspiral, two black holes orbit one another and slowly approach. The second black hole is created when the two black holes combine and deform. The black hole eventually takes on its definitive shape.
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the length of the displacement vector represents how far an object is what?
The length of the displacement vector represents how far an object is traveled in one direction and is therefore denoted as option C.
What is a Displacement vector?This is used in geometry and mechanics and it helps to tell how much the position of an object has changed and also includes how far you have traveled and in which direction which may be eastwards, westward etc.
It talks about both a displacement and a direction of the object and is the reason why it is regarded as a vector quantity which is often measured in meters and the value depends on how far the object is . However, it doesn't signify visibility or how it is thrown but also depicts that it travels in one direction and is therefore the reason why option C was chosen as the most appropriate choice.
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The options are:
A) is visible
B) can be stretched
C) traveled in one direction
D) can be thrown
a 0.20 kg yo-yo attached to a 0.60 m string is swung in a circle in the horizontal plane. find the tension in the string if the yo-yo has an angular velocity of 150 revolutions per minute.
According to the query, the strain in the string would be 29.60N if the yo-yo rotated at a rate of 150 minutes per revolution.
What does physics mean by tension?Physicist tension illustration
Why is there tension? Any physical thing that is in contact with another item can apply pressures to that item. Depending on the sorts of objects in touch, we label these friction coefficient differently. We refer to the tension as tension if a rope, thread, chain, or cable is one of the things applying the force.
M= 0.20kg
r= 0.60m
Angular velocity = 150rev/min
ω= 150rev/min[2π rad/1rev][1 min/60 sec]
ω= 15.70 rad/sec
As it revolve in a circle path, the centripetal force is equal to tension in string .
T = mω2r
= (0.20)(15.70)(0.60)
= 29.60N
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calculate the maximum centripetal acceleration that a test-tube sample held in the centrifuge arm 15.6 cm from the rotation axis must withstand.
15650 revs min & seconds = 260.833 revs a sec. If r = 15.7 mm, c=2(3.14)r ≈ 98.646 cm A rate of 0.98646 m/s. A max gravity force so a vial set as in centrifuge leg will life is eq(v2)/r = (0.986462)/0.157=6.19811 m/s2.
What does the centrifugation process entail?The process of centrifugation involves rapidly spinning molecules in solution around in an axle (in a centrifugal rotor) to separate them based on their densities. It is one of the more practical and widely used procedures in molecular biology labs.
Why do people use centrifuges?To sort fluids, gasses, or liquids depending on density, centrifuges are employed in a variety of laboratories. The purification of cells, organelles, viruses, proteins, and nucleic acids is a common task for centrifuges in both research and clinical facilities.
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two point charges with 6.98x10-9 c and 6.44x10-9 c of charge are separated by a distance of 0.404 m. find the approximate electric force with which the two objects interact
The two items are located at a distance of 0.404 m, which results in an approximate electric force between them of 2.48 x 10-6 N for repelling two point charges with charges of 6.98 x 10-9 and 6.44 x 10-9 c.
How much of an electric force exists between two objects?
F= kq1 q2/r2 F= 9x10-9, 6.98x10-9, 6.44x10-9/0.404x2, and 2.48x10-6 N ( repulsive)
The electric force is the force that draws electrons and nuclei together. The results of experiments have demonstrated that the electrical force exerted on two objects is inversely proportional to their distance.The negative cube of the distance that separates two things determines the force between them.
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suppose the mass is pulled down to where the spring's length is 56 cm . when it is released, it begins to oscillate. what is the amplitude of the oscillation?
The amplitude of the oscillation is the maximum displacement of the mass from its equilibrium position, which is the position where the spring is at its natural length.
What is Amplitude of an oscillation?It is a scalar quantity and is typically represented by the letter A. In simple harmonic motion, like the oscillation of a mass on a spring, the amplitude is the maximum distance that the oscillating object (in this case the mass) is displaced from its rest position. The amplitude can also be used to describe the maximum intensity of a wave, such as the amplitude of a sound wave, which corresponds to the loudness of the sound.
It is also important to note that amplitude is directly proportional to the energy of the oscillation.
In this case, the amplitude would be the difference between the position where the mass is pulled down (56 cm) and the natural length of the spring. Without more information about the spring's natural length, it is impossible to determine the amplitude of the oscillation.
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an object travels with a velocity represented by the function . the objects initial velocity is 5 m/s and it starts at a position of 10 m. determine the final position of the object after 20 seconds. also, determine its initial acceleration and its final acceleration. (4843 m, -3m/s2, 77 m/s2)
The initial acceleration is negative that is -3 m/s² and the final acceleration of the object is 77m/s². The final position is 4843meters. Thus, the correct option is A.
What is Acceleration?Acceleration is the change in the initial velocity and final velocity of an object. Acceleration is a vector quantity because it has both the magnitude and direction. The SI unit of acceleration is meter per second square (m/s²).
Velocity (v) = 2t² - 3t + 5
Initial velocity = 5m/s
Initial Position = 10m
v = ds/ dt
Sf - Si = [tex]\int\limits^t_t{v} \, dt[/tex]
where, upper t = final time and lower t = initial time
Sf - Si = [tex]\int\limits^20_0 {(2t^{2} - 3t + 5)} dx[/tex]
Sf - Si = (2t³/3 - 3t²/ 2 +5t)²⁰₀
Sf - 10 = 4833.3meters
Sf = 4833.3 + 10
Sf = 4843.3 meters
Acceleration = dv/dt
Acceleration = d/ dt (2t² - 3t + 5)
Acceleration = 4t - 3
Initial acceleration (ai at t = 0sec) = 4(0) - 3 = -3 m/s²
Final acceleration (at at t = 20sec) = 4(20) - 3 = 80 - 3 = 77m/s²
Therefore, the correct option is A.
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waves are observed passing under a dock. wave crests are 8.0 meters apart. the time for a complete wave to pass by is 4.0 seconds. the markings on the post submerged in water indicate that the water level fluctuates from a trough at 6.0 meters to a crest at 9.0 meters. what is the amplitude of the wave? 1.5 m 3.0 m 6.0 m 9.0 m
Given that the distance between the crest and the trough is 3 meters, the amplitude should be half of that, which is 1.5 meters.
What does a wave example of amplitude mean?Here are a few illustrations of amplitude:The distance between a wave's peak and the still water's surface is how large of a wave it is.The concentration of air molecules at the core of a compression and pulse of sound would determine the amplitude of the a sound wave.
What does a Class 11 wave's amplitude mean?The maximum displacement of a wave propagating medium particle from its mean location to its extreme position is the amplitude.
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Sodium and potassium are in the same group in the periodic table. Sodium is in the 11th position. How many valence electrons does potassium have?
a stroboscope is a light that flashes on and off at a constant rate. it can be used to illuminate a rotating object, and if the flashing rate is adjusted properly, the object can be made to appear stationary. (a) what is the shortest time between flashes of light that will make a three-bladed propeller appear stationary when it is rotating with an angular speed of 16.7 rev/s?
The shortest time between flashes of light that will make a three-bladed propeller is 0.02 sec
What is a stroboscope used for?A potent, swift-moving light source called a stroboscope is utilised for high-speed photography and the visual analysis of periodic motion. The stroboscope can be used to analyse things in rapid periodic motion by giving the appearance of paused or slowed motion.
revolution of the propeller
=> 1s/1.67 rev
T=> 0.059 s/rev
If all three blades of a three-bladed propeller are the same, the stroboscope can flash once every third revolution as follows:
T1/3 => 1/3 x 0.059
=> 0.02 sec.
What guiding principle governs the stroboscope?A device that periodically emits quick, powerful flashes of light is known as a stroboscope. When a fast-rotating object (like the cooling fan inside a computer) is illuminated by a stroboscope's flashing light, the object appears to be stationary.
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a 22 cm diameter bowling ball has a terminal speed of 77 m/s. Answer in kg.
The mass of a bowling ball whose diameter is 22 cm and has a terminal speed of 77 m/s is 6.62 kg.
What is terminal speed?The maximum speed (terminal velocity) that an object can reach while falling throughout a liquid. The speed wherein the drag force equivalent to the gravitational force is known as the terminal velocity. The object's mass, cross-sectional area, drag coefficient, the density of the fluid it is falling through, and gravitational acceleration will all affect its terminal velocity.
By using the equation of terminal speed-
Vt = √2mg/ρADc
77 = √2(9.8)m / (1.225) (π(0.11)∧2 (0.47)
m = 77∧2[(1.225)(π(0.11)∧2(0.47)] / 2(9.8)
m = 6.62 kg
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Suppose you throw a football. At some instant, when the ball is in contact with your hand, your hand exerts a force of 600 N on the ball in the x direction. What is the force of the ball on your hand
The force of the ball on your hand is 600 N.
What is Newton's third law of motion?Newton's third law of motion states that, for every action force, there is an equal and opposite reaction force. That is action force and reaction force are equal in magnitude but opposite in direction.
Mathematically, the formula for Newton's third law of motion is given as;
Fa = - Fb
where;
Fa is the force exerted by AFb is the reaction of BIf your exert a certain amount of force on a ball, the ball will exert the same equal amount of force back to your hand but in opposite direction.
Thus, the force of the ball is equal to 600 N.
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Two 2.10 cm × 2.10 cm plates that form a parallel-plate capacitor are charged to ± 0.708 nC .
Part A
What is the electric field strength inside the capacitor if the spacing between the plates is 1.30 mm ?
Part B
What is potential difference across the capacitor if the spacing between the plates is 1.30 mm ?
Part C
What is the electric field strength inside the capacitor if the spacing between the plates is 2.60 mm ?
Part D
What is the potential difference across the capacitor if the spacing between the plates is 2.60 mm ?
The electric field strength inside the capacitor does not depend on the distance between plates. Hence, Potential difference and Electric field strength is -234V and -1.8 x 10^5 V/m respectively.
What does "permittivity of open space" mean?The ability of electrical fields to pass through a conventional vacuum is represented by the physical constant known as the permittivity of free space. The constant has a relative standard uncertainty of 1.5 x 10-10 and is equal to around 8.854 x 10-12 F/m (farad per metre).
Q= charge => ± 0.708 nC
E => electric field strength = Q/Aεο
A=> area of plates 2.10x 2.10 cm2.
εο = > 8.854 x 10-12 F/m.
E= -0.708 x10^-9/ (2.1 x 2.1 x 8.854 x 10^-4 x 10^-12)
= -1.8 x 10^5 V/m.
Potential difference = Ed => -1.8 x 10^5 x 1.3 x 10^-3 => -2.34 x 10^2V
=> -234V.
How strong is the electric field?
The intensity of an electric field at a specific location is expressed quantitatively as "electric field strength." The volt per metre (V/m or Vm-1) is the common unit.
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The current in a wire varies with time according to the relation I=55A?(0.65A/s2)t2.
How many coulombs of charge pass a cross section of the wire in the time interval between t=0 and t = 8.5s ?
Express your answer using two significant figures.
What constant current would transport the same charge in the same time interval?
Express your answer using two significant figures.
The constant current that transports the same charge in the same time interval is 55A?(0.65A/s2).
What is current?Current is the movement of electricity, or the flow of electrons, through a conductor. It can also refer to a trend or state of affairs that is happening now, such as a news story or the current political climate. Current can also mean a stream of water, air, or other fluid, or the speed of such a stream.
The amount of charge that passes through a cross section of the wire in the time interval from t=0 and t=8.5s is calculated by integrating the current with respect to time.
Integrating the current, I, with respect to time gives the charge, Q, as:
Q = ∫I dt = ∫ 55A?(0.65A/s2)t2 dt
Integrating yields:
Q = 55A?(0.65A/s2)t3/3
Evaluating the integral from t=0 to t=8.5s yields:
Q = 55A?(0.65A/s2)(8.5s)3/3 = 456.9A?s
Therefore, 456.9A?s of charge pass through a cross section of the wire in the time interval from t=0 and t=8.5s.
The constant current, I, that transports the same charge in the same time interval can be calculated by rearranging the above equation and solving for I.
I = Q/∫ dt = 456.9A?s/(8.5s)3/3 = 55A?(0.65A/s2)
Therefore, the constant current that transports the same charge in the same time interval is 55A?(0.65A/s2).
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would it be more fuel efficient to drive to the top of a hill along a steeply inclined road or a gradually inclined road
It can be concluded that both paths will require same amount of energy to reach the top.
What is work done?The work done by a force on a body that displaces it from its initial location (x{i}) to a new location (x{f}) can be calculated using the formula given by -
dW = Fdx → ∫dW = F∫dx {integral form}W = F × d × cosθ {normal form}W = F{x}d{x} + F{y}d{y} + F{z}d{z} {unit vector form}Given is to drive to the top of a hill along a steeply inclined road and a gradually inclined road.
Greater the amount of work done by burning the fuel on the car, lesser fuel efficient the car will be. The least steep incline will require the least amount of force while the most steep incline will require the greatest amount of force. Force is not the only variable affecting the amount of work done by the car in ascending to a certain elevation. Another variable is the displacement which is caused by this force. the least steep incline would correspond to the largest displacement and the most steep incline would correspond to the smallest displacement. The final variable is θ. The angle between the force and the displacement vector. Theta is 0° in both situations. So when the force is greatest (on steep incline) the displacement is smallest and when the force is smallest (on least steep incline) the displacement is largest. Subsequently, each path happens to require the same amount of work to elevate the object from the base to the same summit elevation.Therefore, it can be concluded that both paths will require same amount of energy to reach the top.
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the exhaust temperature of a carnot heat engine is 300 celsius what is the intake temperature if the efficiency of the engine is 30
A carnot heat engine's intake temperature will be 818.5 K if the engine efficiency is 30 and the exhaust temperature is 300 °C. The ability to avoid material waste, which is frequently quantitative, is efficiency.
Putting in the necessary amount of time, money, energy, and effort into a task or project in order to get the results you want. In a broader sense, it is the ability to complete activities in an effective, efficient, and time-free manner. in terms that are more arithmetical or scientific. Using the Carnot cycle, a heat engine is referred to as a Carnot heat engine.
Carnot engines have an exhaust temperature of 573 k.
Engine performance is similar to E = 1 - T2/T1 0.3 = 1- 573/T1 -0.7 = -573/t1 T1 = 573/0.7 t1 = 818.5K
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If a wave traveling along a string bounces off an object and returns on the opposite side of the equilibrium, what type of boundary did the wave run into
The wave encountered a reflective boundary. A reflective boundary occurs when a wave reaches the end of a medium and then reverses its direction.
In this case, the wave started on one side of a string and, when it reached the object, it reversed direction and traveled back on the opposite side of the equilibrium.
Reflective boundaries usually occur when a wave reaches the end of a medium, but they can also be caused by an obstacle or an abrupt change in the medium's properties. In this case, the object acted as a barrier and reflected the wave, causing it to reverse direction.
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a 500 kgkg horse can provide a steady output power of 750 ww (that is, 1 horsepower) when pulling a load. how about a 38 kgkg sled dog? data show that a 38 kgkg dog can pull a sled that requires a pulling force of 70 nn at a steady 2.4 m/sm/s.
this translates to a power output of 167 ww (70 nn x 2.4 m/sm/s). horse can provide a steady output power when pulling a load.
what is power ?
Power is the ability to influence people, events, or outcomes. It is an important concept in many fields, including politics, business, and psychology. Power is often seen as an abstract concept, but it can be described in terms of tangible resources such as money, authority, and control.
People often use power to achieve their goals and objectives, but it can also be used to limit the freedom and choices of others. Positive power is used to create or support something, while negative power is used to control or manipulate people or situations.
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an object has velocity relative to the ground. an observer moving past with a constant velocity relative to the ground measures the velocity of the object to be (relative to the observer). the magnitudes of these velocities are related by (a) (b) (c) (d) all the above are true. 17. (a) a boy sitting in a railroad car moving at constant vel
The right answer is (C). These velocities' magnitudes are connected by the formula v(2)v(o)+ v (1)
What is speed?The direction of a body or object's movement is defined by its velocity. Through its basic form, speed is just a scalar quantity. In essence, velocity is a vector quantity. It refers to the speed at which distance changes. It is the migration change rate.
Why is velocity a vector unit?Velocity is a vector quantity because it has alike magnitude and direction. Speed is a scalar quantity because it just has magnitude and no direction.Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt.
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the complete question is -
An object has velocity v(1) relative to the ground.An observer moving with a constant velocity v(o) relative to the ground measure the velocity of the object tov(2) be (relative to the observer). The magnitudes of these velocities are related by
(a) v(o)≤v(1)+v(2)
(b) v(1)≤v(2)+v(o)
(c) v(2)≤v(o)+v(1)
(d) All of the above are true
a 1.8 kg book has been dropped from the top of the football stadium. its speed is 4.8 m/sec when it is 2.9 m above the ground. a. what is its total mechanical energy? b. how fast will it be moving when it hits the ground? c. how far above the ground was the book released from rest?
The mechanical energy of the book dropped from the top of the football stadium is 71.89 Joules.
What does it mean to be mechanical?adjective. A person is said to be mechanic if they have a natural aptitude for knowing how machines operate. He was a highly mechanical guy who had a deep understanding of sound. adverb mechanically [ADV -ed]
Given the data in the question;
Mass of the book; m=1.8kg
Speed; v=4.8/s
Height; h=2.9
Mechanical energy; Emcchanical =?
Mechanical energy is energy due to the position or movement of a particle or object. It is expressed as;
Emcchanical= Kinetic energy+ Potential energy
Emcchanical=[tex]\frac{1}{2}mv2[/tex] +mgh
Where m is mass of object, v is velocity, h is height and g is acceleration due to gravity { On earth, acceleration due to gravity }
We substitute our values into the equation
Emcchanical=[tex]\frac{1}{2}*1.8kg*(4.8m/s)2]+[1.8kg*9.8m82*2.9m][/tex]
Emcchanical=20.736kg.m2/82
Emcchanical=71.89.m2/82
Emcchanical=71.89.j
Therefore, the mechanical energy of the book dropped from the top of the football stadium is 71.89 Joules.
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fill in the blank. A 0.50-kg sphere at the top of an incline has a potential energy of 8.0 joules relative to the base of the incline. Rolling halfway down the incline will cause the sphere's potential energy to be ______________.
Answer:
The gravitational potential energy of the sphere would be reduced to [tex](1/2)[/tex] of the initial value.
Explanation:
Near the surface of the Earth, the gravitational field is approximately uniform. The gravitational field strength is approximately [tex]g \approx 9.81\; {\rm N \cdot kg^{-1}}[/tex].
In a uniform gravitational field, the gravitational potential energy (GPE) of an object relative to the ground is proportional to height. For example, if an object of mass [tex]m[/tex] is at a height [tex]h[/tex] above the ground, the GPE of this object would be [tex]m\, g\, h[/tex] relative to the ground.
In this example, the height of the sphere is reduced to [tex](1/2)[/tex] of its initial value. As a result, the GPE of this sphere relative to the ground would also be reduced to [tex](1/2)\![/tex] of the initial value.
