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
Tasya [4]
3 years ago
12

A hollow plastic sphere is held below the surface of a fresh-water lake by a cord anchored to the bottom of the lake. The sphere

has a volume of 0.650 cubic meters and the tension in the cord is 900 N. a) Calculate the buoyant force exerted by the water on the sphere. b) what is the mass of the sphere? c) the cord breaks and the sphere rises to the surface. When the sphere comes to rest, what fraction of its volume will be submerged?
Physics
1 answer:
Naya [18.7K]3 years ago
3 0

Answer: a) B = 6811N

              b) m = 603.2kg

              c) 86.8%

Explanation: <em>Buoyant force</em> is a force a fluid exerts on a submerged object.

It can be calculated as:

B=\rho_{fluid}.V_{obj}.g

where:

\rho_{fluid} is density of the fluid the object is in;

V_{obj} is volume of the object;

g is acceleration due to gravity, is constant and equals 9.8m/s²

a) For the hollow plastic sphere, density of water is 1000kg/m³:

B=10^{3}.0.695.9.8

B = 6811N

b) Anchored to the bottom, the forces acting on the sphere are <u>Buoyant</u>, <u>Tension</u> and <u>Force due to gravity</u>:

B = T + F_{g}

B = T + mg

mg = B - T

m=\frac{B - T}{g}

Calculating:

m=\frac{6811 - 900}{9.8}

m = 603.2kg

c) When the shpere comes to rest on the surface of the water, there are only <u>buoyant</u> <u>and</u> <u>gravity</u> acting on it:

B = m.g

\rho_{w}.V_{sub}.g=m.g

V_{sub}=\frac{m}{\rho_{w}}

V_{sub}=\frac{603.2}{1000}

V_{sub} = 0.6032m³

Fraction of the submerged volume is:

\frac{V_{sub}}{V_{obj}} = \frac{0.6932}{0.695} = 0.868

<u />

You might be interested in
Earning a(n) _________degree will result in you earning approximately 1 million more dollars in your lifetime.
enot [183]

Earning a <em>bachelor's </em><em>degree will result in you earning approximately 1 million more dollars in your lifetime. </em>

7 0
3 years ago
Steel is made of atoms of iron and carbon. Would iron and carbon form metallic bonds? Explain your answer choice.
tino4ka555 [31]

Sample Response: "No, steel and carbon would not form metallic bonds because metallic bonds only form between metals. Iron is a metal, but carbon is not."

8 0
3 years ago
Read 2 more answers
Which of the following correctly compares a scientific investigation to a demonstration
VikaD [51]
Without options I can simply compare a scientific investigation to a demonstration:

<span>An investigation is a process when you are answering a question about the answer of which you do not know while a demonstration is a display or show of how something happens, when you already know the outcome.
</span>
8 0
3 years ago
Read 2 more answers
if you walk across a carpet, touch a doorknob and get a shock, the shock was the result of a _____ static charge.
BabaBlast [244]
Electrostatic (it’s a combined word) that’s all what i know honestly, hope it helps:)
6 0
2 years ago
Does distance from modem affect internet speed
7nadin3 [17]
It shouldn't, but to be honest, it kind of does.
The further you are away from the modem,
the less connectivity you have.
Because you can't connect really well, your internet slows down.

So... yes?
5 0
4 years ago
Other questions:
  • Each part of the mixture has the same appearance.
    10·1 answer
  • One of the main reasons steel is used more widely than iron is because it’s lighter softer stronger than iron
    12·2 answers
  • Describe and open, closed, and isolated system
    13·1 answer
  • In a nuclear power plant, the nuclear reaction is kept from going critical by keeping the rate of reaction safe how to do the co
    12·1 answer
  • Traveler A starts from rest at a constant acceleration of 6 m/s^2. Two seconds later, traveler B starts with an initial velocity
    15·1 answer
  • When plants and animals die, their bodies are decomposed by organisms such as bacteria or fungi. Which statement is true regardi
    8·2 answers
  • A 5-kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope. The force of the block on the Eart
    15·1 answer
  • How many electrons are in 204 C of charge?
    12·1 answer
  • which would be better suited for agriculture, the soil of a tropical rain forest or that of a temperate deciduous forest
    13·1 answer
  • The gravitational pull between Pluto and the sun would be increased if
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!