Acube 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 submerged 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.)
Solved
Show answers
More tips
- C Computers and Internet How to easily and quickly disable Firebug in Gmail and Google Docs...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- C Computers and Internet How to Learn to Type Fast?...
Answers on questions: Physics
- P Physics In a positive correlation, when one variable increases, the other variable...
- P Physics Auniform wire is cut into 4 segments. each segment is twice as long as the earlier segment. if the shortest segment has a resistance of 4 ohm, find the resistance of original...
- P Physics An 18 kg bicycle carrying a 62 kg girl is traveling at a speed of 7 m/s. what is the kinetic energy of the girl and bicycle?...
- P Physics The sun rose at 6: 54 this morning.is this an observation or inference?...
- P Physics When a speeding truck hits a stationary car, the car is deformed and heat is generated. what can you say about the kinetic energy of the system after the collision?...
- P Physics On what single energy source do most energy alternatives depend, either directly or indirectly?...
- P Physics An engineer discovered that a tv set was receiving too much voltage to work properly.which of the following circuit parts should the engineer add to make the tv set work properly?...
- P Physics What is the overall reaction potential for reaction below...
- E English Select the correct sentence. To be a farmer these days, a person is required to have a knowledge of chemistry. To be a farmer these days, a knowledge of chemistry is required....
- M Mathematics A mattress store is having a sale. All mattresses are 30% off. Nate wants to know the sale price of a mattress that is regularly $1,000. Which table represents the situation?...
Ответ:
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
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
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.
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
Replacing
Therefore the density of the liquid is![1085 Kg/m^3](/tpl/images/0410/5113/21bde.png)
Ответ: