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
tresset_1 [31]
3 years ago
5

A cube of volume 5.50×10−3m3 and density 7.50×103kg/m3 hangs from a cable. When the cube has the lower half of its volume submer

ged in an unknown liquid, the tension in the cable is 375 N. What is the density of the liquid? (Ignore the small buoyant force exerted by the air on the upper half of the cube.)
Physics
1 answer:
kati45 [8]3 years ago
6 0

To solve this problem it is necessary to apply the concepts related to the balance of Forces, as well as Newton's second Law and the relationship between density, volume and mass.

Newton's second law indicates that

F = ma \rightarrow m=mass, a = acceleration

At the same time we have that the density is equal to

\rho = \frac{m}{V} \rightarrow m = mass, V=Volume

In other words, Newton's second law could also be expressed as

F = m \rho V

<em>For this problem we will have the forces expressed with two types of densities. The force caused by the weight will have the density of the respective material while the support force will allow us to know the density of the liquid.</em>

From the balance of the bodies we know that the weight of the cube is equal to the tension exerted and the bearing force, therefore,

Weight of cube = Tension + Buoyant force

F_w =  F_l+T

\rho_1 V g = \rho (\frac{V}{2})g + T

Replacing

(7.5 *10^3)(5.5 *10^{-3})(9.8) = \rho(\frac{5.5 *10^{-3}}{2})(9.8) + 375

\rho = 1085 Kg/m^3

Therefore the density of the liquid is 1085 Kg/m^3

You might be interested in
How know that rocks formed from the seafloor sediments deposited in the Amadeus basin were softer than the arkose sandstone
svp [43]
The rocks formed from the seafloor sediments deposited in the Amadeus basin were softer than the Arkose sandstone because the Amadeus basin were made up of marine and non-marine sedimentary rocks which are softer compared to quarts which make up mostly the Arkose sandstone.
7 0
3 years ago
Read 2 more answers
A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal ran
marshall27 [118]

Answer

a) For the rock

\dfrac{v_t^2sin 2\theta}{g} = \dfrac{v_t^2sin^2\theta}{2g}

2sin\thetacos\theta = \dfrac{sin^2\theta}{2}

2cos\theta = \dfrac{sin\theta}{2}

tan\theta = 4

\theta = tan^{-1} 4

\theta = 76^0

b) \theta = 45^0 for maximum range

\dfrac{d_{max}}{d}=\dfrac{(v_tcos 45^0)(2v_tsin 45^0)g}{(v_tcos 76^0)(2v_tsin 76^0)g}

\dfrac{d_{max}}{d}=\dfrac{0.707\times 0.707)}{0.97\times 0.242}

\dfrac{d_{max}}{d}=2.129

d_{max}=2.129 d

c) The value of θ is the same on every planet as g divides out.

5 0
3 years ago
Based on your observations of the six collisions, describe the physical difference between elastic and inelastic collisions.
Ahat [919]

Answer:

Collisions are basically two types: Elastic, and inelastic collision. Elastic collision is defined as the colliding objects return quickly without undergoing any heat generation. Inelastic collision is defined as the where heat is generated, and colliding objects are distorted.

In elastic collision, the total kinetic energy, momentum are conserved, and there is no wasting of energy occurs. Swinging balls is the good example of elastic collision. In inelastic collision, the energy is not conserved it changes from one form to another for example thermal energy or sound energy. Automobile collision is good example, of inelastic collision.

5 0
2 years ago
What feelings do learned helplessness and depression have in common?
8_murik_8 [283]

Answer:

Learned helplessness can have a profound impact on mental health and well-being. People who experience learned helplessness are also likely to experience symptoms of depression, elevated stress levels, and less motivation to take care of their physical health. Not everyone responds to experiences the same way.

Explanation:

Brainlist will be very accepted ;D *wink*

6 0
2 years ago
Which process is represented by the PV diagram shown below?
MrMuchimi

Answer: B. the isovolumetric process

Explanation:

In the graph given, the volume is constant throughout. It represents a constant volume process. Such processes are called the isovolumetric process or isochoric process.

<em>Hence, option B is the correct answer.</em>

Option A is incorrect because in an isobaric process, the pressure is constant.

Option C is incorrect because in an isothermal process, the temperature is constant.

Option D is incorrect because in an adiabatic process there is no heat transfer.

8 0
3 years ago
Other questions:
  • When two atoms of the same nonmetal react, they often form a(an) A. ionic bond. B. polyatomic ion. C. diatomic molecule. D. pola
    10·2 answers
  • All electromagnetic waves travel in vacuum at the speed of c=3×10^8 m/s. Find the wavelength of microwaves of frequency 10^10 Hz
    5·1 answer
  • Which is more expensive to create coal or solar power
    15·1 answer
  • Se lanza un cuerpo de 25 kg sobre un plano horizontal, con una velocidad de 20 m/s. Si el coeficiente de rozamiento es de 0,4 ca
    14·1 answer
  • Question 1 of 11
    6·2 answers
  • Physicists at CERN study the conditions present during the big bang by using machines to do what?
    9·1 answer
  • Marvin lifts a box over his head. The work done on the box is- -Negative work -No work -Positive work
    7·1 answer
  • Question
    12·1 answer
  • Which of the following scenarios represents a safe situation for the child?
    9·2 answers
  • Chemical name and a common name for NaOH​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!