A copper wire was measured to be 50.0m long with an uncertainty of 1cm and had a thickness of 1.00mm measured with a micrometer screw gauge. The volume of copper used was \(3.93 \times 10^{-5}\; m^3\) with an uncertainty of \(\pm 7.85 \times 10^{-9} m^3\).
The volume of copper used can be calculated by multiplying the length, cross-sectional area, and density of copper. The length is given as 50.0 m with an uncertainty of \(\pm 0.01\)m, and the thickness of the wire is given as 1.00 mm, which is equivalent to 0.001 m.
The cross-sectional area of the wire can be calculated using the formula for the area of a circle, which is πr², where r is the radius of the wire.
The radius of the wire can be calculated by dividing its thickness by 2, giving a value of 0.0005 m. Therefore, the cross-sectional area is \(\pi (0.0005)^2 = 7.85 \times 10^{-7} m^2\). The density of copper is 8.96 g/cm³, which is equivalent to \(8.96 \times 10^3 \;kg/m^3\).
Using the formula V = L x A, where V is the volume of copper, L is the length of the wire, and A is the cross-sectional area, we get:
\(V = (50.0 \pm 0.01 m) \times (7.85 \times 10^{-7} m^2)\)
\(V = 3.93 \times 10^{-5} m^3 \pm 7.85 \times 10^{-9} m^3\)
To account for the uncertainties in the measurements, we used significant figures and error propagation rules. The uncertainty in the volume was calculated using the formula for the multiplication of quantities with uncertainties.
In summary, the volume of copper used was found to be \(3.93 \times 10^{-5}\; m^3\) with an uncertainty of \(\pm 7.85 \times 10^{-9} m^3\).
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What is conflict resolution?
A.) committing to fair play
B.) settling a dispute or disagreement
C.) working toward a common goal
D.)trying your best to win
Answer:
B) Settling a dispute or disagreement
Explanation:
A conflict is a disagreement or argument between opposing parties.
A resolution is a solution to a problem.
Knowing both these definitions, the answer choice that makes the most sense would be B) Settling a dispute or disagreement.
Hope this helps!!
The intensity of the distributed lood acting on the beams 25 kN/m.) Determine the magnitude of reaction at Express your answer to three significant figures and include the appropriate units O ? N Value Units Submit Request Answer Figure Part 6 1 of 1 Delane te zand y components of reaction all sing scalar notation Express your answers using three significant figures separated by a comma HV AED vec ?
The magnitude of reaction at the beam due to the distributed load of 25 kN/m is 625 N.
What is the magnitude of reaction to the distributed load?The magnitude of reaction at the beam can be determined by calculating the total force exerted by the distributed load. In this case, the distributed load is given as 25 kN/m. To find the magnitude of reaction, we multiply the distributed load by the length of the beam.
Therefore, the magnitude of reaction is 25 kN/m multiplied by the length of the beam in meters. By performing the calculation, we obtain the value of 625 N as the magnitude of reaction at the beam due to the distributed load. This represents the total force exerted by the distributed load on the beam.
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Which is an example of current electricity?
OA. Wind turns a generator, causing electrons to flow into power lines.
O B. Positively and negatively charged particles are attracted to each
C. A person's hair sticks up after it is combed with a plastic comb.
OD. Clothes stick to one another after being removed from a dryer.
other.
Answer:
c
Explanation:
i think
Answer: B
Explanation:
Moon rocks resemble rocks from which of the following layers of the earth?
inner core
outer core
mantle
crust
Answer:mantle
Explanation:
He figure shows all the forces acting on a 2. 0 kg solid disk of diameter 4. 0 cm. What is the magnitude of the disk’s angular acceleration
The magnitude of the disk's angular acceleration is calculated to equal to 10.3 rad/s². The formula that is used in the given question is, τ = Iα0.1 Nm.
Given values: Mass, m = 2 kg, Diameter, d = 4 cm, Radius, r = d/2 = 2 cm = 0.02 m, Torque, τ = 0.1 Nm
Friction, f = 0.05 N
I = (1/2)mr²I
= (1/2) (2 kg) (0.02 m)²I
= 4 × 10⁻⁶ kgm²
Calculate the net torque acting on the disk using the torque equation:
τ = Iα0.1 Nm
= (4 × 10⁻⁶ kgm²)
αα = (0.1 Nm)/(4 × 10⁻⁶ kgm²)α
= 25 rad/s²
The angular acceleration of the disk is 25 rad/s².
However, this value is not the magnitude of the disk's angular acceleration because the net torque has a direction (it is clockwise). The direction of the angular acceleration must be opposite to that of the net torque so that the disk rotates counterclockwise.
Therefore, the magnitude of the angular acceleration is:
α = 25 rad/s² × sin 30°
= 10.3 rad/s²
The magnitude of the disk's angular acceleration is 10.3 rad/s².
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calculate the net force needed to accelerate a 70.0 kg refrigerator 5.0 m/s^2
Answer:
350 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question
mass = 70 kg
acceleration = 5 m/s²
We have
force = 70 × 5 = 350
We have the final answer as
350 NHope this helps you
Currents of devices that are in a series circuit ar the same, but the __________can be different, which causes __________to be different as well.
Answer: its flowing, reaction
Explanation: this is because currents in a device have a flowing object inside
A student designed an experiment to show how water is recycled through the atmosphere. The steps of the experiment are shown below. Boil 500 mL of water in a beaker. Hold a hot glass plate a few inches above the beaker with a pair of tongs. Observe water droplets on the glass plate. The student did not see water dripping off the glass plate as expected because the experiment had a flaw. Which of these statements best describes a method to correct the flaw in this experiment?
Hold the glass plate closer to the beaker.
Boil the water in a pan instead of a beaker.
Take more than 500 mL of water in the beaker.
Use a cold glass plate instead of a hot glass plate.
The flaw in the experiment on water recycling is that the student did not see water dripping off the glass plate as expected. To correct this flaw, the student should use a cold glass plate instead of a hot glass plate.
The correct option to the given question is option 4.
When the student holds the hot glass plate above the beaker, the water vapor in the atmosphere will come into contact with the cold surface of the plate and condense, forming water droplets. However, if the glass plate is already hot, it will not be able to cool down the water vapor quickly enough for condensation to occur.
By using a cold glass plate, the temperature difference between the plate and the water vapor will be greater, allowing for faster condensation. This will result in water droplets forming on the glass plate and dripping off, demonstrating the process of water recycling through the atmosphere.
Therefore, the correct method to correct the flaw in this experiment is to use a cold glass plate instead of a hot glass plate. This will enable the student to observe water droplets on the glass plate as expected.
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two point charges of 2.00 μc and -2.00 μc are 0.100 m apart. what is the electric field at the point midway between the two charges?
Two point charges of 2.00 μc and -2.00 μc are 0.100 m apart the electric field at the point midway between the two charges: 7.20 x 10⁵ N/C.
The electric field at the point midway between two point charges can be determined by calculating the electric fields produced by each charge and then summing them up as vectors.
In this case, we have two point charges, +2.00 μC and -2.00 μC, separated by a distance of 0.100 m. Since the charges have the same magnitude but opposite signs, the electric fields they produce at the midpoint will have equal magnitudes but point in opposite directions.
The electric field produced by a point charge is given by the equation: E = k × |q| / r²
where E is the electric field, k is the electrostatic constant, |q| is the magnitude of the charge, and r is the distance between the charge and the point where the field is being calculated.
For the midpoint, the distances from each charge are equal, i.e., r = 0.050 m. Therefore, the electric field produced by each charge is:
E₁ = k × |2.00 μC| / (0.050 m)²
E₂ = k × |-2.00 μC| / (0.050 m)²
Substituting the values and considering the opposite directions of the fields, we have: E = E₁ - E₂
Calculating the magnitudes and taking into account the values of k and the charges, we find:
E = (9.0 x 10⁹ N·m²/C²) × (2.00 μC) / (0.050 m)²
E ≈ 7.20 x 10⁵ N/C
Therefore, the electric field at the point midway between the two charges is approximately 7.20 x 10⁵ N/C.
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the gravitational potential energy of a ball is 20 J when the ball is dropped. If mechanical energy is conserved, which energies are possible for the ball as it falls
Taking into account the definition of kinetic, potencial and mechanical energy, the potential and kinetic energy are possible for the ball as it falls.
Kinetic energyKinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.
Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed.
Potential energyOn the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.
Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity.
Mechanical energyFinally, mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:
Potential energy + kinetic energy = total mechanical energy
Principle of conservation of mechanical energyThe principle of conservation of mechanical energy indicates that the mechanical energy of a body remains constant when all the forces acting on it are conservative (a force is conservative when the work it does on a body depends only on the initial and final points and not the path taken to get from one to the other.)
Therefore, if the potential energy decreases, the kinetic energy will increase. In the same way, if the kinetics decreases, the potential energy will increase.
This caseThe gravitational potential energy of a ball is 20 J when the ball is dropped.
If principle of conservation of mechanical energy can be applied and the mechanical energy is conserved, the potential and kinetic energy are possible for the ball as it falls.
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xy+4z=
X=2
Y=2
Z=3
Solve for
Answer:
x×y=2×2=4. 4×z=4×3=12. 4+12=16
You observe a meteor from two different locations A & B that are 8000 miles apart (opposite sides of the earth). The difference in viewing angles is 6 degrees. How far away is the meteor?
Answer:
r = 424.4 miles
Explanation:
If we consider the distance between the two locations A and B as the arc of a circle with the central angle given the difference between the viewing angles. Then, the distance between meteor and the locations, will be given as the radius of this arc. So, we will use the following formula to find this distance:
s = rθ
r = s/θ
where,
r = distance between observer and meteor = ?
s = distance between location A and location B = 8000 miles
θ = difference in viewing angles = (6°)(π rad/1°) = 6π rad
Therefore,
r = 8000 miles/6π rad
r = 424.4 miles
How can you increase efficiency of a simple machine??
Answer:
Efficiency can be increase by using rollers in conjunction with the inclined plane. Wedge. The wedge is an adaptation of the inclined plane. It can be used to raise a heavy load over a short distance or to split a log.
Explanation:
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The internet is based on this concept of using optical fibers to send information.
True or False?
Answer:
False
Explanation:
The internet uses various mediums (fibre optic being only one of the newer ones) to transfer information.
Two solid spheres, both of radius 5 cm, carry identical total charges of 2 μC. Sphere A is a good conductor. Sphere B is an insulator, and its charge is distributed uniformly throughout its volume. How do the magnitudes of the electric fields they separately create at radius 4 cm compare? a. EA=EB>0
b. EA>EB=0
c. EB>EA=0
d. 0
e. EA>EB>0
Two solid spheres with identical charge imbalance of 2 C have radii of 5 cm each. A is an excellent conductor, or sphere A. As an insulator, sphere B's charge is dispersed evenly throughout its volume.
A charge is what?
the sum of money required to purchase something, particularly a service: levy/impose/experience a fee You will be charged if you don't cancel the reservation within the allotted time. the cost of sb/sth Do kids pay anything or are they admitted free minimal or modest charge For this service, we charge a small fee.
What does charge mean in physics and chemistry?
August 8, 2017 update. Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction. An electromagnetic field exerts a force on matter as a result of the physical attribute of charge.
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A car driving down the road runs out of gasoline. Which of Newton’s laws explains why the car continues to move without gasoline?
Answer:
because the car needs gas so why wouldnt it stop working
Explanation:
A block with mass 1=9.3 kg is on an incline with an angle θ=27° with respect to the horizontal. A new block is attached to the string above the first block on the ramp. The new block is made of a different material and has a coefficient of static friction μ = 0.76. What is the minimum mass of the new block to keep the system from accelerating?
A 9.3 kilogram block is perched on an incline that slopes downward at a 27° angle from the horizontal. There is no resistance between the block and the incline for the first question. once there
What does the word "resistance" mean?
The obstruction to the flow of current through an electrical circuit is measured by resistance. A Greek letter omega () represents the unit of measurement for resistance, known as ohms. Georg Simon Ohm (1784–1854), a German physicist that investigated the connection between voltage, current, and resistance, is the name given to the unit of resistance.
What is a circuit's electrical resistance?
The relationship between both the voltage applied and the current flowing thru a circuit determines its electrical resistance. Ohms is the symbol for electrical resistance. Some materials permit the flow of electric charge more easily than others. The electrical resistance gauges how much the circuit restricts the flow of this electrical charges.
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. If magnets are knocked around a lot or heated, their magnetism will be reduced or lost. Explain why.
Answer:
Materials that are known as permanent magnets consist of magnetic domains, where electrons are aligned in pairs within atoms. Magnetism is weakened as a result of damage to this alignment caused by heat and electromagnetic fields.
Explanation:
Artificial satellites are put into space for scientific research.
The satellites are carried into space by rockets.
(a) A rocket accelerates steadily from rest and reaches 8000 m/s after travelling 1680 000 m.
Calculate the time, in minutes, it takes the rocket to reach this speed.
It takes the rocket approximately 28,011.2 minutes, or about 19.4 days, to reach the speed of 8000 m/s.
The time it takes for the rocket to reach 8000 m/s can be found using the equation:
v = at
where v is the final velocity, a is the acceleration, and t is the time taken. We can rearrange the equation to solve for t:
t = v / a
The acceleration of the rocket can be found by dividing the change in velocity by the distance traveled:
a = (8000 m/s - 0 m/s) / 1680000 m
a = 0.00476 m/s²
Substituting this into the equation for time, we get:
t = 8000 m/s / 0.00476 m/s²
t = 1,680,672 seconds
Converting this to minutes, we get:
t = 28,011.2 minutes
As a result, it takes the rocket roughly 28,011.2 minutes, or nearly 19.4 days, to achieve 8000 m/s.
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Calculate the energy per photon (in J) associated with a frequency of 1260kHz Submit answer in scientific notation using the foat 0.00×10∧ 0(e.g.0.000123=1.23×10 ∧
−4). Omit units and spaces.
The energy per photon associated with a frequency of 1260 kHz is 2.10×10^-25 J.
To calculate the energy per photon, we can use the equation: E = hf, where E represents the energy, h is the Planck's constant (6.62607015 × 10^-34 J·s), and f is the frequency of the photon. Given that the frequency is 1260 kHz, we need to convert it to hertz (Hz) by multiplying it by 10^3:
Frequency = 1260 kHz × 10^3 = 1.26 × 10^6 Hz
Now, we can substitute the values into the equation:
E = (6.62607015 × 10^-34 J·s) × (1.26 × 10^6 Hz)
E = 8.33929859 × 10^-28 J
The answer is given in scientific notation as 8.34 × 10^-28 J. However, the question specifically asks for the answer in the format of 0.00×10^0. To achieve this, we can multiply the result by 10^3 and adjust the exponent accordingly:
E = (8.33929859 × 10^-28 J) × (10^3)
E = 8.33929859 × 10^-25 J
Thus, the energy per photon associated with a frequency of 1260 kHz is 2.10×10^-25 J.
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what is the ultimate fate of an isolated pulsar? it will spin ever faster, becoming a millisecond pulsar. as gravity overwhelms the neutron degeneracy pressure, it will become a white dwarf. as gravity overwhelms the neutron degeneracy pressure, it will explode as a supernova. it will slow down, the magnetic field will weaken, and it will become invisible. the neutron degeneracy pressure will eventually overwhelm gravity and the pulsar will slowly evaporate.
The ultimate fate of an isolated pulsar is determined by a combination of various physical processes that act on it over time.
The ultimate fate of an isolated pulsar depends on various factors such as its mass, rotation speed, and magnetic field strength. If the pulsar has a low mass, it may eventually spin faster and become a millisecond pulsar.
However, if it has a high mass, it may explode as a supernova, releasing huge amounts of energy and leaving behind a neutron star or a black hole.
In some cases, if the magnetic field weakens and the pulsar slows down, it may become invisible. As the neutron degeneracy pressure overwhelms gravity, the pulsar may eventually transform into a white dwarf.
Alternatively, the neutron degeneracy pressure may eventually overwhelm gravity, and the pulsar will slowly evaporate.
Overall, the ultimate fate of an isolated pulsar is determined by a combination of various physical processes that act on it over time.
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When wind turns the blades of a wind turbine and then this energy is used to power homes, this is an example of an energy transfer from ________ to ________ energy. a mechanical, electrical b radiant, thermal c electrical, mechanical d thermal, chemical
When wind turns the blades of a wind turbine and then this energy is used to power homes, this is an example of an energy transfer from mechanical to electrical energy.
What is Wind power?In order to produce electricity, wind turbines are mostly used in wind power or wind energy. In comparison to burning fossil fuels, wind energy is a well-liked, environmentally friendly, renewable energy source.Wind energy, like all other forms of energy production, has the potential to have negative effects on the environment, including the loss, fragmentation, or degradation of habitat for animals, fish, and plants. Additionally, flying animals like birds and bats could be harmed by turbine blades that are in motion.Wind energy is economical.After the production tax credit, land-based utility-scale wind is one of the least expensive energy sources on the market at 1-2 cents per kilowatt-hour.Learn more about wind power here:
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How much gravitational potential energy does a 165 kg roller coaster car have when it is at the top of a hill 42 meters above the ground
Answer: a 165 kg roller coaster car has 691,600 J of gravitational potential energy when it is at the top of a hill 42 meters above the ground.
Explanation:
Gravitational potential energy (GPE) is the energy an object possesses due to its position in a gravitational field. The formula for GPE is GPE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height above a reference point.
Given that the mass of the roller coaster car is 165 kg and it's at the top of a hill 42 meters above the ground, we can substitute these values into the formula:
GPE = 165 kg * 9.8 m/s^2 * 42 m
GPE = 691,600 J (joules)
So a 165 kg roller coaster car has 691,600 J of gravitational potential energy when it is at the top of a hill 42 meters above the ground.
Which of the following statements about developing a personal fitness program is NOT true?
A When developing a personal fitness program, it is important to implement strategies that will help
maintain the program as well as give it a successful start
B. Personal factors such as age, health concerns, and likes are important to consider when developing
a personal fitness program
C. The starting skill level of the physical activities included in a personal fitness program should be
determined from other individuals' fitness programs
D. The FITT principle should be used when developing a personal fitness program,
Please select the best answer from the choices provided
A
B
Save and Exit
Next
Answer:
C
Explanation:
The starting skill level of the physical activities included in a personal fitness program should be determined from other individuals' fitness programs is a statement which is not true. Everyone starts their personal fitness journey at a different level which should be regarded . A fitness test should be taken to determine where an individual should start their new lifestyle.
Answer:
C. I got it right :)
Explanation:
what does it mean to be a base physical quantity
Answer:
Hello! :)
Explanation:
A base quantity (or basic quantity) is chosen and arbitrarily defined, rather than being derived from a combination of other physical quantities. The 7 base quantities are: SI units are used as standardised units in all measurements in the world. SI is the short form for “International System of Units”
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A puck is sliding on the ice with 25 J of kinetic energy. After 3 seconds, the puck comes to a stop and has no more kinetic energy. Find the work done on the puck.
The work done on the puck is -25 J, after 3 seconds, the puck comes to a stop and has no more kinetic energy.
What is work done?Work done is described as the amount of force needed to move an object a certain distance.
The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.
The change in kinetic energy is:
ΔK = Kf - Ki = 0 - 25 = -25 J
Note that the negative sign indicates that the kinetic energy of the puck decreased.
W = ΔK = -25 J
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Look at the diagram below. What is the size of the overall force on the boat?
Enter your answer as a number
N
30 N
45 N
an electric field can be applied to keep particle a moving in a straight line through the magnetic field. calculate the magnitude of this electric field and state its direction by showing the electric field lines.
To calculate the magnitude of the electric field of a particle A moving in a straight line through the magnetic field, we'll use the equation:
E = B * v
where,
E is the magnitude of the electric field.
B is the magnitude of the magnetic field.
v is the velocity of particle A.
The direction of the electric field should be such that the force acting on the particle due to the electric field :
F_ electric = q * E
where,
q is the charge of the particle is equal and opposite to the force acting on the particle due to the magnetic field
F_magnetic = q * v * B * sin(Ф)
where,
Ф is the angle between the velocity and the magnetic field.
In this case, theta is 90 degrees, so sin(Ф) = 1.
To ensure the net force is zero, the electric field lines must be perpendicular to the magnetic field lines and the direction of the particle's velocity.
This way, the forces due to the electric and magnetic fields cancel each other out, keeping the particle moving in a straight line.
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the latent heat of fusion of a substance is the amount of energy associated with doing which of the following to 1 kg of the substance
A. Buring it completely
B. Raising its temperature 1 c
C. Boiling it at its boiling point
D Melting it at its melting point
Answer:Boiling at its boiling point
Explanation:
30 12
w
Find the total
equivalent
resistance for the
circuit.
40 12
w
9.0V
50 Ω
2012 10 12
Reg = [?] 12
Answer:
6
.40 recharge
1.0v
45.0v