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
andreev551 [17]
3 years ago
9

A copper wire of length L and cross-sectional area A has resistance R. A second copper wire at the same temperature has a length

of 2L and a cross-sectional area of A. What is the resistance of the second copper wire?
A. 2R
B. 4R
C. R
D. 1/2 R
Physics
1 answer:
qwelly [4]3 years ago
8 0

Answer: 4R

Explanation:R=pL/A

R second wire=p2L/1/2A

=4R

You might be interested in
e force acting between two charged particles A and B is 5.2 × 10-5 newtons. Charges A and B are 2.4 × 10-2 meters apart. If the
anastassius [24]
The force acting between the particles is

F=k \frac{Q_{1}Q_{2}}{r^2}
Then
Q_{2}= \frac{5.2 \times 10^-^5 \times 0.024^2}{ 9.0 \times 10^9 7.2 \times 10^-^8} =4.622 \times 10^-^1^1C




7 0
3 years ago
Read 2 more answers
What is the domain theory of ferromagnetism?
Margaret [11]
A region within a magnetic material in which magnetization is in a uniform direction this means the individual magnetic moments of the atoms are aligned with one another and they point the same direction. when cooled bwlow a temperature called the curie temperature the magnetization of a piece of ferromagnetic material.<span />
5 0
3 years ago
In some cases fixture wires may be used for
zalisa [80]

You can use fixture wires: For installation in luminaires where they are enclosed and protected and not subject to bending and twisting and also can be used to connect luminaires to their branch circuit conductors.

<h3>What are some uses of fixture wires?</h3>

Fixture wires are flexible conductors that are used for wiring fixtures and control circuits. There are some special uses and requirements for fixture wires and no fixture can be smaller than 18 AWG

In modern fixtures, neutral wire is white and the hot wire is red or black. In some types of fixtures, both wires will be of the same color.

To know more about fixture wires, refer

brainly.com/question/26098282

#SPJ4

3 0
1 year ago
Why are such scientific advances still valuable?
Sergeu [11.5K]
Because the more advances made in the world means the more we can learn on how things work and how we can better the lives of humans and other species. If we didn't have scientific advancements we wouldn't have cell phones, electric, tv, car, computers, ect. We would still be living in Cave man era with clubs and horrible language skills.
4 0
3 years ago
(Will give brainliest)
Sveta_85 [38]

Answer:

b.) Length

Explanation:

The length of the string can be changed by removing it from the slotted bracket and placing it back  in. You can change the mass by varying the number of washers on the mass hanger. The amplitude  can be changed by varying the starting angle of the pendulum (low, medium, and high angle). sorry if wrong

8 0
3 years ago
Other questions:
  • An electromagnetic wave with high frequency and high energy is A. Safe for humans. B. Is helpful to humans. C. Is helpful to hum
    14·1 answer
  • Why does the moon appear to wax grow larger and then wane or get smaller
    11·1 answer
  • What happens to volume if pressure and temperature are doubled?
    6·1 answer
  • The density of a substance is defined as its
    14·1 answer
  • What state has the longest coast
    9·1 answer
  • 5. The entrance of a science museum features a funnel into which marbles are rolled one at a time. The marbles circle around the
    12·1 answer
  • A Perspex container has a 6 cm square base and contains
    12·1 answer
  • What are the three major tendons in the knee?
    10·2 answers
  • (11) The speed of radio waves is 300 000 000 m/s.
    13·1 answer
  • If you have 100 W expended over 20 s how much energy did it take?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!