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
musickatia [10]
3 years ago
6

Suppose an electrical wire is replaced with one having every linear dimension doubled (i.e. the length and radius have twice the

ri original values). The wire now has ... a resistance which depends only on the material. the same resistance as before. less resistance than before. a resistance which can't be further predicted with the given information. more resistance than before.
Physics
1 answer:
saul85 [17]3 years ago
7 0

Answer:

The wire now has less (the half resistance) than before.

Explanation:

The resistance in a wire is calculated as:

R=\alpha \frac{l}{s}

Were:

R is resistance

\alpha is the resistance coefficient

l is the length of the material

s is the area of the transversal wire, in the case of wire will be circular area (s=\pi r^{2}).

So if the lenght and radius are doubled, the equation goes as follows:

R=\alpha \frac{l}{\pi r^{2} } =\alpha \frac{2l}{\pi {(2r)}^{2} } =\alpha \frac{2l}{\pi 4 {r}^{2} }=\frac{1}{2} \alpha \frac{l}{\pi r^{2} }

So finally because the circular area is a square function, the resulting equation is half of the one before.

You might be interested in
Which of the following objects would have the strongest gravitational pull on a third object positioned at an equal distance fro
3241004551 [841]
I believe Box B will have a greater gravitational pull because the gravitational pull of an object depends on its mass. The more mass an object has, the greater its gravitational pull will become.

For example, we can take planets. Naturally, they are round because once upon a time there was a larger piece of rock that attracted others. But the size of the rock won't matter, it's the weight that matters. If the rock weighed nothing, the other rocks would just rebound upon contact. But if the rock weighed a lot, then things wouldn't so easily rebound and might actually stick to it.
8 0
3 years ago
What animal did wolfgang kohler use to study insight learning
Katena32 [7]

Answer:

He used a chimp to study

6 0
3 years ago
You notice that the price of Blu-ray players falls and the quantity of Blu-ray players sold increases. This set of observations
satela [25.4K]

Answer:

Option C

Explanation:

When this type of situation occurs where the price falls and the sale of a product increases then a shift is observed in the supply curve towards right as a result of this shift there is a need to shift down the demand curve

Thus When supply curve is shifted to the right the demand curve is moved down accordingly.

6 0
3 years ago
A rat runs 2m right, turns around and runs 3m left. Then goes 2m right. What is its displacement?
geniusboy [140]

Answer:

Explanation:

I think this answer would be 1m to the left.

7 0
3 years ago
What type of energy does a soccer player transfer to the ball?
MrMuchimi
In soccer, the ball is potential energy. When you kick the ball, it becomes kinetic energy.
8 0
3 years ago
Read 2 more answers
Other questions:
  • What are the agonist and antagonist muscle of a wrist joint???
    10·2 answers
  • You are a support technician working in a data closet in a remote office. You suspect that a connectivity problem is related to
    15·1 answer
  • An electrostatic paint sprayer has a 0.200-m-diameter metal sphere at a potential of 25.0 kV that repels paint droplets onto a g
    8·1 answer
  • A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
    9·1 answer
  • Consider the diatomic molecule oxygen O2 which is rotating in the xy plane about the z axis passing through its center, perpendi
    8·1 answer
  • A negative body image can affect your fitness because being healthy asks you to keep
    7·1 answer
  • Fill in the blank for the following statement: Physical weathering is the ________.
    11·2 answers
  • A 2.0-kg mass swings at the end of a light string (length = 3.0 m). Its speed at the
    12·1 answer
  • raju is standing at a distance of 1.5 m from a plane mirror find the distance between raju and his image between raju and his im
    14·1 answer
  • What indicates that a chemical reaction has taken place? Explain why
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!