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
umka21 [38]
3 years ago
12

220V is applied to two different conductors made of the same material. One conductor is twice as long and twice as thick as the

second. What is the ratio of the power transformed in the first relative to the second?
Physics
1 answer:
ollegr [7]3 years ago
7 0

Answer:

Explanation:

For calculating resistance of a conductor , the formula is

R = ρ l / A , ρ is specific resistance , l is length and A is cross sectional area of wire.

For first wire length is l₁ , area is A₁ resistance is R₁, for second resistance is R₂ , length is l₂ and area is A₂

Given , l₁ = 2l₂ , A₁ = 4A₂ , area is proportional to square of thickness.

R₁ / R₂ = I₁A₂ / I₂A₁

= 2l₂ x A₁ / 4 I₂A₁

= 1 / 2

2R₁ = R₂

Power = V² / R

Ratio of power = (V² / R₁) x (R₂ / V²)

= R₂ / R₁

= 2 .

You might be interested in
A very thin oil film (n = 1.25) floats on water (n = 1.33). What is the thinnest film that produces a strong reflection for gree
mixer [17]

Answer:

200 nm is the thinnest film that produces a strong reflection for green light with a wavelength of 500 nm

Explanation:

If two reflected waves interfere constructively ,strong reflection is produced. Two reflected waves will experience a phase change

For constructive interference

2\times n\times t=m\lambda

for thinnest film m=1

refractive index should be taken for film n=1.25

thickness of the thinnest film is

t=\frac{m\lambda}{2n} \\t=\frac{1\times 500}{2\times 1.25} \\t=200 nm

6 0
3 years ago
Why are paperclips attracted to magnets? Group of answer choices They contain silver They contain aluminum They contain tin They
riadik2000 [5.3K]

Answer:

They contain iron.

Explanation:

Iron is made of metal and magnets attract to metal Iron.

5 0
3 years ago
A 0.144-kg baseball is moving toward home plate with a speed of 43 m/s when
algol [13]
I would say 648858. bc yes
4 0
3 years ago
If the emf produced in a wire is 0.88 volts and the wire moves perpendicular to a magnetic field of strength 0.075 newtons/amper
Elza [17]
Emf = d (phi-B) / dt 
<span>B dA/dt, where dA/dt is the area swept out by the wire per unit time. </span>
<span>0.88 V = (0.075 N/(A m)) (L)(4.20 m/s), so </span>
<span>L = (0.88 J/C) / [ (0.075 N s/C m)(4.2 m/s) ] = about 3 meters</span>
6 0
3 years ago
Read 2 more answers
What is the kinetic energy in joules of a 0.05. kg bullet traveling 310 m/s
Wittaler [7]
The formula is=1/2(m x v^2)

so = 1/2*(0.05)*(310)^2

ans is =2402.5 joules
3 0
3 years ago
Other questions:
  • When the same amount of heat is added to 50.0 g of each substance, which of the following will have the smallest temperature inc
    7·1 answer
  • An isotope of the element fluorine has 9 protons and 10 neutrons. What is the name of this isotope? fluorine-
    11·2 answers
  • There are usually _________ collisions in a motor vehicle crash.
    5·1 answer
  • What is the absolute value of the horizontal force that each athlete exerts against the ground?
    10·1 answer
  • A thin, uniform rod is hinged at its midpoint. to begin with, one-half of the rod is bent upward and is perpendicular to the oth
    14·2 answers
  • All digits shown on measuring device, plus one estimated digit, are considered_______.
    14·1 answer
  • Is nickel coin magnetic?
    12·2 answers
  • A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of ma
    14·1 answer
  • In the United States, household electric power is provided at a frequency of 60 HzHz, so electromagnetic radiation at that frequ
    6·1 answer
  • Can someone pls help i’m not good at pysics
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!