First I assumed the question asks about max e.m.f so I just used ratio:
output voltage = (2500 / 1100) x 12.7 = 28.9 V, but the answer is wrong.
Then I tried to use the ratio of the whole formula:
$$\frac{\varepsilon_{1}}{\varepsilon_{2}}=\frac{NBA \omega_{1} \sin(\omega_{1}t)}{NBA \omega_{2}...
I want to ask about part c (iii). This is what I did:
max e.m.f produced = NBAω = 32 x 0.074 x 4.8 x 10-2 x 2.4 x 10-2 x 2π x 9 = 0.15 V
But the answer is 0.077 V so my answer is off by factor of two.
Is my mistake related to "emf produced across the side of AC of the coil"?
Thanks
Hi,
I was trying to read about the current produced by a dynamo in my physics books but I can't find any reference.
I have a rotor rotating at a certain speed, air flow and with a certain inertia, but how can i find the power produced and related current and tension?
The answer is that there would only be a 250 bp fragment, and it would be brighter.
I think that there would just more fragments of all sizes, as more DNA is degraded. I don't understand why there wouldn't be fragments of larger sizes. Thanks!
Hello,
I have used an edge current of 10 A through a 0,45 cm (lenght) wire inside an air sphere. The thing is that, according with Ampere law, the magnetic field (B) produced at a 1 mm of distance from the wire shall be 0,002 T, and I am obtaining much higher values in this simulation (around...
i found current to be 2/5 A. then 2/5A multipled by 6s = 2.4C. and since one joule per coulomb is equal to the unit of p.d, i get 2.4J. I don't get 4.8J(supposed answer)
The solution for a) is 2H2O+2e- → H2 +2OH-, and the solution for b) is O2, because the half reaction at the anode is
2H2O→O2 +4H+ + 4e-.
I don't understand why the electrolysis does not involve Na2SO4 being reduced or oxidized, and only considers water. Thanks.
A thought experiment:
A electron is moving in a straight line at velocity v. It instantly stops dead. It doesn't move another femtometer.
Obviously its magnetic field collapses and produces light. What is the waveform of the light produced?
Is it something like this...
Table:
To solve, using the conservation of energy:
E0=(m(deutron)+m(16O)-m(17O)-m(p))c^2
so:
E0=(2.014+15.994-16.999-1.008)931.5=0.93 MeV.
so using the conservation of energy:
14.95+0.93=16.62+0+E'
E'=- 0.74 MeV
But the energy sign has become negative. I also calculated for the first excited...
The nuclear fission reaction is:
##U_{92}^{235} + n^{1}_{0} \to Ba_{56}^{141} +Kr_{36}^{92} + 3 ~n^{1}_{0} ##
I am not sure about the number of neutrons produced. Is it 2 or 3?
2 is from the number of neutrons on the RHS - number of neutron on LHS
3 is from the number of neutrons on RHS only...
I was wondering about EM waves produced by linearly accelerating charges, as opposed to oscillating charges.
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Researchers at Rice University in Houston, Texas, USA have found a low cost way to produce Graphene from just about any Carbon based material. They flash heat it to around 3 000k by electrical discharge and it cools into single-layer flakes...
Hello, everyone. Does anyone know how much steam is produced by an electric arc furnace in a set amount of time? I have not been able to find any information on this despite how much water is no doubt used to cool the electric arc furnace. Can anyone help?
My Attempt So Far:
1. Write down all information:
Q=10m³ /min
h=75m
2. Change 10m³ /min to m³ /s
10m³ /min × min/60s =1/6 m³ /s
3. Change Volumetric Flow Rate to Mass Flow Rate
ṁ=ρQ
ṁ=1000kg/m³ × 1/6 m³ /s
ṁ=166.67 kg/s
4. Apply Potential Gravitational energy but replacing the Mass with...
I'm currently researching if I could implement some wave energy into my small scale hypothetical project. I've identified some commercial models, namely Seabased and SINNPower, and I assumed that they would have approximate values of power output given wave period, height (among many other...
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I had the opportunity to talk with multiple Ph.D. students during the summer and was especially interested in...
So I worked out the first part and obtained ##E_1 = 478.8MeV##, ##E_2 = 459.4MeV## and ##p = 0.49 MeV/c## but I can't quite wrap my head around the second part. Normally, I'd use the equation for s but I'm confused since I don't know the angle between the gamma rays.
Homework Statement
(a) With the aid of a sketch explain how proportional action is produced
in a pneumatic controller whose output is 0.2 to 1.0 bar. Assume that
the controller is direct acting.
(b) Show, mathematically, that the output is dependent on the difference
between the measured and...
Homework Statement
In perspective to the photoelectric effect I found following question:
Electric current is charge flowing per unit of time. If we increase the kinetic energy of the photoelecrons (by increasing the energy of the incident photons), shouldn’t the current increase, because the...
Homework Statement
A tone will be produced when blowing air to partially filled bottle. What will be the new frequency after drinking some water in the bottle and repeating the same experiment, ?
a. Higher than before
b. Less than before
c. same as before...
So, a static charge at rest produces an electric field, but no magnetic field.
A charge moving with constant velocity produces both electric and magnetic fields.
Why is it that accelerating charges are the source of all electromagnetic radiation?
How would one go about showing this using...
Homework Statement
The figure below shows a small circular loop of wire in the plane of a long, straight wire that carries a steady current I upward. If the loop is moved from distance x_2 to distance x_1 from the straight wire, what will be the direction of the induced current in the loop and...
Hi All,
I would like to know if the following statement is true or false:
The nuclear processes that happen inside the Sun can produce at least one unity of each of the known chemical elements.
Best Regards,
DaTario
I measure sound (dB) from a speaker at 0cm and 100cm using a diaphragm microphone.
0cm-100dB, 100cm-30dB
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A rod of length ##L_o## is kept on a friction-less surface. The coefficient of linear expansion for the material of the rod is ##\alpha##. The the temperature of the rod is increased by ##\Delta T## the strain developed in the rod will be?
Homework Equations
$$ \Delta L=...
To begin, I am not sure whether or not this is the correct location for this post since I am a complete greenhorn to this forum (just joined today!).
I ask how much heat is produced by radioactive waste because I was wondering if it was viable to reuse all the tons of stored radioactive waste...
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Homework Statement
Energy released is 5.6MeV, 5kW is produced, Half life = 87.7 years for Uranium
Need to find how many kg you need to produced that much power.
Homework Equations
E = Pt, Q = (mass defect) * 931.5MeV/c^2
The Attempt at a Solution
I solved for the energy released to be...
Hi
So I am busy studying rotational motion and there's an example in the book where they explain that when a car brakes the force of friction acts as a torque force which explains why a car lifts up at the back when braking.
Because the car does no rotational motion they say the net torque is...
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Homework Statement
Two thin lenses are placed 5 cm apart along the same axis and illuminated with a beam of light parallel to that axis, The first lens in the path of the beam is a converging lens of focal length 10 cm whereas the second is a diverging lens of focal length 5 cm. If the second...
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Homework Statement
https://imgur.com/gallery/vCOZq
Its question 26, and the figure can be seen at figure 30.26
Derive and expression for the magnetic field produced at point P due to the current carrying wire shown in figure 30.26. The curved parts of the wire are pieces of concentric...
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2 bodies with contant heat capacity C and 2C, are initially at temp T and 2T. if a heat engine executing a reversible carnot cycle operates between the two bodies until their temperatures are equal, what is the final temp of the bodies and how much work is preformed by the...
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A charged wire of negligible thickness has length 2L units and has a linear charge density λ. Consider the electric field E⃗ at the point P, a distance d above the midpoint of the wire.
What is the magnitude E of the electric field at point P? Throughout this part, express...
Homework Statement
10.00 cm3 of 1.00 mol dm–3 sulfuric acid is fully neutralized by 20.00 cm3 of 1.00 mol dm–3 of sodium hydroxide. What is the concentration, in mol dm–3, of sodium sulfate solution produced by the reaction?
A 0.33
B 0.50
C 0.67
D 1.00
Correct answer = A
Homework Equations...
I thought only strange particles were produced in pairs via the strong interaction, however in my textbook it states 'kaons, like pions are produced in pairs via the strong interaction'.
Can particles that are not strange also be produced in this way?
Homework Statement
Consider an aircraft turbine as in the figure below. In the reference frame of the turbine, air of density ##\rho_0## comes into the turbine with speed ##U_0## through the entrance with cross sectional area ##S_0##. In the combustion zone, air is mixed with the fuel and...
Hi guys,
It's been a while since I've done much resolving forces stuff, and I'm struggling to make sure what I'm doing is right. I have a setup like below, and I want to find the torque around point D due to the force acting at point A.
I've had a couple attempts but I feel like I'm just...
Homework Statement
Suppose n straight lines are drawn on a plane. When these lines are removed, the plane falls apart into several connected components called regions.A region R is is said to be convex if it has the following property: whenever two points are in R, then the entire line segment...