1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GaryK [48]
3 years ago
12

Superconductors have no measurable resistance. true or false?

Physics
1 answer:
trapecia [35]3 years ago
7 0
True, they have zero electrical resistance.
You might be interested in
The model of the atom proposed by Greek philosophers appears similar to the model proposed centuries later by Dalton. What was t
Sladkaya [172]
The main difference between the model of the atom proposed by Greek philosophers and the model proposed centuries later by Dalton is that the Greek one was mainly speculative and philosophical - it wasn't based on real evidence, but on their suggestions and thoughts about the matter. On the other hand, Dalton had the means to prove his theory using viable evidence, not just speculations.
4 0
3 years ago
What would be the orbital speed and period of a satellite in orbit 0.82 ✕ 108 m above the earth?
Ivenika [448]
The answer should be 88.56
3 0
3 years ago
An atom of sodium-23 (atomic number = 11) has a positive charge of +1. Given this information, how many
12345 [234]
It has a 10 electrons. Since it's atomic number is 11 it must have 11 protons. Also, given that it has a +1 charge, it has one less electron than protons since they have equal but opposite charges. The number of protons is the mass number minus the atomic number = 23-11= 12 neutrons.
5 0
3 years ago
You cheated on a test and you know it was the wrong thing to do according to the psychology theory what helped you know this
Alexandra [31]

Answer:

You cheated on a test, and you know it was the wrong thing to do. According to the psychoanalytic theory, what helped you know this?

The id controlled your biological response and made you sweaty because you were scared of getting caught.

The superego acted as your moral conscience; you just knew that it wasn't right to cheat.

The ego made you feel guilty as a defense mechanism. both B and C

Explanation:

the  answer is both B,C

6 0
3 years ago
A length of copper wire carries a current of 14 A, uniformly distributed through its cross section. The wire diameter is 2.5 mm,
gavmur [86]

Answer:

a. ρ_\beta=1.996J/m^3

b. U_E=9.445x10^{-15} J/m^3

Explanation:

a. To find the density of magnetic field given use the gauss law and the equation:

i=14A, d=2.5mm, R=3.3Ω, l=1 km, E_o=8.85x10^{-12}F/m, u_o=4*x10^{-7}H/m

ρ_\beta=\frac{\beta^2}{2*u_o}

ρ_\beta=\frac{1}{2*u_o}*(\frac{u_o*i^2}{2\pi *r})^2

ρ_\beta=\frac{u_o*i^2}{8\pi*r}=\frac{4\pi *10^{-7}H/m*(14A)^2}{8\pi*(1.25x10^{-3}m)^2}

ρ_\beta=1.996J/m^3

b. The electric field can be find using the equation:

U_E=\frac{1}{2}*E_o*E^2

E=(\frac{i*R}{l})^2

U_E=\frac{1}{2}*8.85x10^{-12}*(\frac{14A*3.3}{1000m})^2

U_E=9.445x10^{-15} J/m^3

4 0
3 years ago
Other questions:
  • Magma can partially crystallize at depth and then rise to shallow depths where the remaining magma solidifies. the early-formed
    11·1 answer
  • When you hear a noise, you usually know the direction from which it came even if you cannot see the source. This ability is part
    10·1 answer
  • The period of an ocean wave is 5 seconds. What is the wave's frequency?
    14·1 answer
  • Deneb and the Sun are two stars. Deneb has a diameter that is 109-200 times greater than that of the sun. When seen from earth,
    11·1 answer
  • Explain the difference between si base units and derived units. give an example of each
    6·1 answer
  • The brakes on a truck fail as it approaches a car stopped at a red light. Use Newton’s first and second law of motion to explain
    6·2 answers
  • 10 Points
    9·2 answers
  • Which type of electricity moves along part way to turn on light ​
    10·1 answer
  • Uncle Harry weighs 750 N. What is his mass in kg?
    11·2 answers
  • A 9.0 V battery does 550 J of work transferring charge. How much charge is transferred?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!