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
bulgar [2K]
3 years ago
11

A steel cable of diameter 3.0 cm supports a load of 2.0kN. What is the fractional length increase of the cable compared with the

length when there is no load if Y=2.0 x 10^11 Pa?
Physics
1 answer:
zhannawk [14.2K]3 years ago
6 0

Answer:

1.429*10^-5 m

Explanation:

From the question, we are given that

Diameter of the cable, d = 3 cm = 0.03 m

Force on the cable, F = 2 kN

Young Modulus, Y = 2*10^11 Pa

Area of the cable = πd²/4 = (3.142 * 0.03²) / 4 = 0.0028 / 4 = 0.0007 m²

The fractional length = Δl/l

Δl/l = F/AY

Δl/l = 2000 / 0.0007 * 2*10^11

Δl/l = 2000 / 1.4*10^8

Δl/l = 1.429*10^-5 m

Therefore, the fractional length is 1.429*10^-5 m long

You might be interested in
A ball is projected upward at time t=0.0s, from a point on a roof 90m above the ground. The ball rises, then falls and strikes t
chubhunter [2.5K]
As v becomes zero at the highest point, i prefer considering different travelling directions so it will become less complicated.
dont forget to add the total time up .

also to master the skills, write down the "uvsat" may help (thats the way i found it easier to handle problems)

4 0
3 years ago
In our Solar System, the inner planets are rocky because Choose one: A. warm temperatures in the inner disk caused the inner pla
xeze [42]

The inner planets are rocky because The warm temperatures in the inner disk caused the inner planetesimals to be formed of mostly rocky material.

What are rocky planets?

  • Rocky planets are the planet in which constituents are mostly silicate rocks or metal. They are also regarded as a planet with a solid surface.
  • The formation of rocky planets is said to have occurred billions of years ago and its process of formation is termed accretion. Through accretion are its constituents formed as the more it goes bigger, the higher the rising temperature and pressure in its core and the elements which have to undergo accreted heat up, melt, and spread. Through this process, heavier elements go deeper into the core of the planet and lighter elements float toward the surface.
  • In the formation of rocky planets, the inner portions of the disk are said to be warm from the protostar thereby resulting in the production of the heavy elements that stay there.
  • Examples of rocky planets are Earth or Mars

Hence, from the above, we can say that,

The warm temperatures in the inner disk caused the inner planetesimals to be formed of mostly rocky material.

Here,

Option A is correct.

Learn more about rocky planets here:

<u>brainly.com/question/22392798</u>

#SPJ4

3 0
2 years ago
A train whose proper length is 1200 m passes at a high speed through a station whose platform measures 900 m, and the station ma
TiliK225 [7]

Answer:

0.66c

Explanation:

Use length contraction equation:

L = L₀ √(1 − (v²/c²))

where L is the contracted length,

L₀ is the length at 0 velocity,

v is the velocity,

and c is the speed of light.

900 = 1200 √(1 − (v²/c²))

3/4 = √(1 − (v²/c²))

9/16 = 1 − (v²/c²)

v²/c² = 7/16

v = ¼√7 c

v ≈ 0.66 c

6 0
3 years ago
The Kelvin scale is the most common temperature scale used in what
dalvyx [7]
It's mostly used in CHEMICAL PROCESSES.
7 0
3 years ago
Read 2 more answers
One degree Celsius indicates the same temperature change as
miss Akunina [59]
The Celsius degree is the same size as the Kelvin.
The correct choice is 'C'.
7 0
3 years ago
Other questions:
  • Which is the correct scientific notation for 724,000,000,000?
    12·1 answer
  • Modern scientists say that electrons are found in a ...
    6·2 answers
  • Watt, which is a unit of power, is equal to ____ a) a joule divided by a second b) a joule times a meter c) a joule times a seco
    7·2 answers
  • If two planets are close enough to each other do they have a greater gravitational pull then two planets that are farther away?
    9·2 answers
  • Astronomers have recently observed stars orbiting at very high speeds around an unknown object near the center of our galaxy. Fo
    14·1 answer
  • Electromagnetic waves are not mechanical waves, which means they can<br> travel in a:
    13·1 answer
  • Based on Newton's law of motion, which combination of rocket bodies and engine will result in the acceleration of 40 m/s ^2 at t
    8·1 answer
  • How can scientific phenomena be used in design?​
    13·1 answer
  • The term 'balanced diet' best means a person is getting which of the following? O A fewer nutrients and vitamins than it needs.
    13·2 answers
  • What mathematical formula is needed to determine the student's displacement from point A to C? (Hint: think
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!