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
marusya05 [52]
3 years ago
12

A wire of length 40 cm and area of cross -section 0.1 mm² has a resistance of 0.8Ω. Calculate specific resistance of the wire.​

Physics
1 answer:
alina1380 [7]3 years ago
7 0

l = 40cm  \\    \bold \red{area \: of \: cross \: section} \: a = 0.1mm {}^{2}   \\  =  \frac{0.1}{100} cm {}^{2}  \\  \\  \R = 0.8  Ω \\  \\ \bold \green{ Specific \:  Resistance \:  of \:  wire \:ρ } =  \frac{Ra}{l}  \\  =  \frac{0.8}{40}  \times  \frac{1}{100}  \\ \\   ρ = 0.00002Ω - cm

Hope This Helps!!

You might be interested in
Two boxes on opposite ends of a massless board that is 3.0 m long. The board is supported in the middle by a fulcrum. The box on
rosijanka [135]

Answer:

b. 1.1 m

Explanation:

It is given that the total distance between the masses is equal to the length of the board, which is 3 m. Therefore,

s_{1} + s_{2} = 3\ m\\\\s_{2} = 3\ m - s_{1}\ --------- eqn(1)

where,

s₁ = distance of fulcrum from left mass

s₂ = distance of fulcrum from right mass

In order to achieve balance, the torque due to both masses must be equal:

T_{1} = T_{2}\\m_{1}s_{1} = m_{2}s_{2}\\(25\ kg)(s_{1}) = (15\ kg)(s_{2})\\\\\frac{15\ kg}{25\ kg}(s_{2}) = s_{1}\\\\using\ eqn(1):\\(0.6)(3\ m - s_{1}) = s_{1}\\1.8\ m = 1.6\ s_{1}\\s_{1} = \frac{1.8\ m}{1.6}

s₁ = 1.1 m

Hence, the correct option is:

<u>b. 1.1 m</u>

4 0
3 years ago
#1 What materials is each part of the flashlight made of? (A flashlight will include wires,a light bulb,a lens, a reflector ,and
s344n2d4d5 [400]

Explanation:

Question 1

1.The wires are made of conducting materials e.g copper

2. A light bulb is made of filament material e.g tungsten with gases enclosed in a glass material

3.The lens is made of transparent glass material

4 The reflector is made of plastic with silver lining

5. The exterior casing of most flash lights are made of plastic

Question 2.

1.Copper is used to conduct electric current from the battery to the bulb

2.The tungsten filament ignite the gases and causes it to glow

3. The lens covers the lamp on your flashlight so that the glass on the lamp

/bulbs does not get broken.

4.The reflector redirects the light rays from the lamp, creating a steady beam of light, which is the light you see emitting from the flashlight.

5. The exterior cases houses the entire assembly and makes the flash light handy for use

4 0
3 years ago
Which layer of the earth includes the ozone layer
Rus_ich [418]
Troposphere is the answer
7 0
3 years ago
If the moon is a full moon tonight what will be the moon one week later waxing or waning
tatiyna

-- Starting from nothing (New Moon), the moon's shape grows ('waxes')
for half of the cycle, until it's full, and then it shrinks ('wanes') for the next
half of the cycle.

-- The moon's complete cycle of phases runs 29.53 days . . . roughly
four weeks.

-- So, beginning from New Moon, it spends about two weeks waxing until
it's full, and then another two weeks waning until it's all gone again.
 
-- After a Full Moon, the moon is waning for the next two weeks.  So it's
definitely <em>waning</em> at <em><u>one week</u></em> after Full.


5 0
3 years ago
Balanced forces can change an<br> object's direction.<br> A. True<br> B. False
makvit [3.9K]

Answer:

False

Explanation:

Balanced forces result in a net force of 0N. This means no direction or acceleration change will be applied to the object. A torque may be applied, but with no other external forces, the object will not move.

8 0
3 years ago
Other questions:
  • In parallel circuits total resistance will be less than the resistance of the least resistence device. HOW ? please helppp
    12·1 answer
  • What is the line running through earth from pole to pole
    6·2 answers
  • When magnesium fluoride reacts with iodine, the products are fluorine and magnesium iodide. What would the equation be?
    15·1 answer
  • ¿Cuál es el valor de la sumatoria de todas las fuerzas que actúan sobre un cuerpo que está en equilibrio?
    12·1 answer
  • Two children want to balance horizontally on a seesaw. The first child is sitting one meter to the left of the pivot point locat
    9·1 answer
  • Which device provides electrical energy to run an electric circuit
    14·2 answers
  • How many distillation are there?​
    13·1 answer
  • What is the potential energy of a 20-kg safe sitting on a shelf 0.5 meters
    10·1 answer
  • Types of telescope<br>for Space<br>observation​
    12·2 answers
  • Suppose we observe a cepheid variable in a distant galaxy. The cepheid brightens and dims with a regular period of about 10 days
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!