Which change decreases the resistance of a piece of copper wire

Answers

Answer 1

Answer: The only easy ways ti decrease the resistance of a piece of wire are...

==> pack the wire in ice; make it colder.

==> cut a piece off of the wire; make it shorter.

Related Questions

The Slowing Earth The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about 0.840 longer to complete 365 revolutions than it did in the year 1906.What was the average angular acceleration of the Earth during this time? Give your answer in rad/s2
Edwin Hubble categorized galaxies according to theirA. shapes.B. colors.C. food supplies.D. inhabitants.
Why are the inner planets not made of light elements?
How do the units of work and power compare? a) The unit for work is a watt. The unit for power is a joule, which is a watt-second. b)The unit for work is a watt. The unit for power is a joule, which is a watt per second. c)The unit for work is a joule. The unit for power is a watt, which is a joule-second. d)The unit for work is a joule. The unit for power is a watt, which is a joule per second.
Quan sát sóng dừng trên sợi dây dài 60cm cố định hai đầu, thấy có 3 nút (bao gồm cả hai nút hai đầu) và 2 bụng. Bước sóng của sóng lan truyền trên sợi dây là:A. 30cm. B. 40cm. C. 20cm. D. 60cm.

A gas has an initial volume of 24.6 L at a pressure of 1.90 atm and a temperature of 335 K. The pressure of the gas increases to 3.50 atm, and the volume of the gas increases to 31.3 L.

Answers

The problem can be solved by using the formula associated with the gas laws. It is as follows:

PV/T

Given:

P1 = 1.9 atm
V1 = 24.6 L
T1 = 335 K

P2 = 3.5 atm
V2 = 31.3 L
T2 = ?

Substituting the given:

P1V1/T1 = P2V2/T2
(1.9 * 24.6)/335 = (3.5 * 31.3)/T2
T2 = 785.18 K

A rain gutter is to be constructed from a metal sheet of width 30 cm by bending up one-third of the sheet on each side through an angle θ . How should θ be chosen so that the gutter will carry the maximum amount of water?

Answers

Answer:

Explanation:

The volume of the water carried will be proportional to the cross-sectional area. The cross-section is a trapezoid with height 10sint, where t represents theta. The top of the trapezoid is 10+(2)(10cost), i.e. 10 + 20cost. The base of the trapezoid is 10.

Area of trapezoid = (average of bases) times (height)

= ([10 + (10 +20cost)] / 2 ) 10 sint

= (10 + 10cost)(10sint)

= 100sint + 100sintcost, call this A(t). You need to maximize. So differentiate and set equal to zero.

dA/dt = -100sin(t)^2+100cos(t)+100cos(t)^2 = 0, divide by 100:

-sin(t)^2 + cos(t) + cos(t)^2 = 0, replace sin^2 by 1-cos^2

2cos(t)^2 + cos(t) - 1 = 0, factor

(1+cos(t))(2cos(t)-1)=0, so

cos(t)=1, t=0 that give a min (zero area) not a max, or

cos(t) = 1/2, so t=60 degrees. This gives the max.

A man pushes on a box at an angle of 30.0° with a force of 20.0 N and the box moves across the floor. Which of the following component of the force do you use to calculate work?

Answers

Not sure what the given options are, but the answer is the horizontal component. This is given by Force x cos(angle), or Fcos(θ), where θ is the angle. In this case that would be 20cos(30) = 17.32N

What is the use if having a control condition in an investigation

Answers

Answer:

Thus, including a control condition allows researchers to compare the way things are in the presence of an independent variable with the way things would have been in the absence of an independent variable.

Explanation:

What are the 6 principles of relative age dating? Please this is due today

Answers

Principles of relative dating

Uniformitarianism. ...

Intrusive relationships. ...

Cross-cutting relationships. ...

Inclusions and components. ...

Original horizontality. ...

Superposition. ...

Faunal succession. ...

Lateral continuity.

https://en.wikipedia.org/wiki/Relative_dating

When the mass of an object increases, the force of gravityincreases.
decreases.
remains the same.
becomes irregular.

Answers

The forces of gravity between two objects depend on the masses
of both objects. So if one mass increases, then the objects will be
drawn together by stronger gravitational force.

Example:
When a person eats a lot of steak and fat and carbohydrates, his
mass increases, and the bathroom scale shows that the gravitational
forces drawing him and the Earth together have increased. We say
that he has "gained weight".

increases

the amount of directly tied to the mass of the object... if the object has less mass, so does the amount of gravity...

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A 1.0 kg book is lifted 0.5 m above the table , but the table is 1.0 m above the floor , what would be the P.E of the book if the reference level where the floor ?

The type of surface that warms up the fastest is the

Question 1.1. Using correct biomechanics helps maximize sport performance. True False Question 2.2. The "Fosbury Flop" is named because his idea didn't work. True False Question 3.3. Using correct biomechanics will actually decrease your chances of injury. True False