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
ira [324]
3 years ago
10

A 5000-km long cable consists of seven copper wires, each of diameter 0.85 mm, bundled together and surrounded by an insulating

sheath. Calculate the resistance of the cable. Use 3x10^-6 cm.Ω for the resistivity of the copper.
Physics
1 answer:
sladkih [1.3K]3 years ago
4 0

Answer:

The resistance of the cable is 37762.91 ohms.

Explanation:

let L be the length of the cable, A be the cross-sectional area of the cable and   r be the resistivity of the copper.

then, the resistance of the cable is given by:

R = r×L/A

  = (3×10^-8)×(5000×10^3)/(7×π((0.85×10^-3)/2)^2)

  = 37762.91 ohms

Therefore, the resistance of the cable is 37762.91 ohms.

You might be interested in
If you increase the force on an item without changing the mass you increase acceleration? true or false?
rusak2 [61]
(F)(M)=A
Force times Mass equals Acceleration.
The answer is TRUE. 
If the mass increases the number on the left side of the equation increases, thus increasing the right side as well.
5 0
3 years ago
(15 points) :^|
mihalych1998 [28]
That is FALSE. The equation to calculate the charges has a distance component that is in the denominator which means that it is inversely proportional (as the distance os greater the force is smaller)
7 0
3 years ago
For a wave, the _____ the amplitude, the _____ energy the wave carries.
Rudik [331]

Answer:

<h2>HIGHER & MORE OR LARGER OR MORE </h2>

HENCE, THE ANSWER IS A. :)

Explanation:

<em><u>#</u></em><em><u>CARRYONLEARNING</u></em>

<em><u>BRAINLIEST</u></em><em><u> </u></em><em><u> </u></em><em><u>PLEASE</u></em><em><u> </u></em><em><u>I </u></em><em><u>REALLY </u></em><em><u>NEED</u></em><em><u> </u></em><em><u>IT</u></em>

3 0
2 years ago
Read 2 more answers
A chinook salmon needs to jump a waterfall that is 1.5 m high. If the fish starts from a distance of 1.00 m from the base of the
____ [38]
 <span>let the fsh jump with initial velocity (u) in direction (angle p) with horizontal 

it can cross and reach top of trajectory if its top height h = 1.5m 
and horizontal distance d = (1/2) Range 
--------------------------------------... 
let t be top height time 
at top height, vertical component of its velocity =0 
vy = 0 = u sin p - gt 
t = u sin p/g 
h = [u sin p]*t - 0.5 g[t[^2 
1.5 = u^2 sin^2 p/g - u^2 sin^2 p/2g 
u^2 sin^2 p/2g = 1.5 
u^2 sin^2 p = 1.5*2*9.8 = 29.4 
u sin p = 5.42 m/s >>>>>>>>>>>>>>> V-component 
===================== 
t = HALF the time of flight 
d = (1/2) Range (R) = (1/2) [2 u^2 sin p cos p/g] 
1 = u^2 sin p cos p/g 
u sin p * u cos p = 9.8 
5.42 * u cos p = 9.8 
u cos p = 1.81 m/s >>>>>>>>>>>>> H-component 
check>> 
u = sqrt[u^2 cos^2 p + u^2 sin^2 p] = 5.71 m/s 
u < less than fish's potential jump speed 6.26 m/s 

so it will able to cross</span>
8 0
2 years ago
10,500 J of GPE, weight 539 N, how tall is the hill you are sitting on?
maks197457 [2]

Answer:

19.48 m

Explanation:

Gravitational potential energy = mgh

Current weight = 539 N

Weight = mg = 539 N

Mass x Acceleration = 539 N

Mass x 9.81 = 539

Mass = 54.94 kg

Gravitational potential energy = mgh = 10500 J

                    54.94 x 9.81 x h = 10500

                               h = 19.48 m

Height of sitting = 19.48 m

6 0
2 years ago
Other questions:
  • Please help!
    11·2 answers
  • Cheryl has a mug that she says is made up of matter. Heather says that the hot chocolate inside the cup is made up of matter, to
    6·1 answer
  • A wave has a wavelength of 45 meters and a period of 9.0 seconds. What is the frequency of the wave? 5.0 m/s 405 Hz 5.0 Hz 0.11
    5·2 answers
  • A 1200-kg ore cart is rolling at 10.8 m/s across a flat friction-free surface. a crane suddenly drops of ore vertically into the
    11·1 answer
  • How high off the ground is a a book that has 120 J of potential energy and a 4-kg mass ​
    10·1 answer
  • How are interference patterns made?
    10·1 answer
  • What causes scientific knowledge to change over time?
    15·2 answers
  • This table shows the weights of four different objects that are sitting on the
    6·1 answer
  • How far does an object travel if it is moving at a speed of 4 m/s for 3.2 seconds?
    5·1 answer
  • If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gr
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!