# Mechanical Properties Of Fluids Free Doubts and Solutions

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## i am unable to understand how (b) & (c) are correct & (d) incorrect.

**araima2001**18th March 2017, 8:19 PM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## Thank you madam for this information but I want to ask a new question,please explain how venturimeter works?

**aadeshpdabre**28th February 2016, 3:15 PM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

**If surface tension is increased what happens the suface area and angle of contact..?**

**If surface tension is increased what happens the suface area and angle of contact..?**

**rohithk754**11th February 2016, 6:26 PM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## In, the proof /derivation of exess pressure inside air bubble in a liquid
Fp2=Ft+Fp1
Fp2.......> The force due to the pressure from inside the bubble.
Fp1........>The force due to the pressure from out side the bubble.
Ft..........>Force of tension .
'Ft' will be balanced by the other other hemisphere of that bubble . But why it is taken to be balanced by 'Fp2' &
prove /derive Ft=2piRT.

**Vineeth K**22nd February 2015, 8:51 AM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## Why does the fluid present in a cylinder spinning with a constant rotational speed form a parabolic shape?

**Amyra B**18th December 2014, 9:32 AM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## but sir density as we go deep keeps on changing then why the pressure should be calculated keeping density 1,,,, also as we go down the same volume of liquid would weight different and hence different pressure.
So you cannot tell me anything about contacting,.....well okkk
Sir my question which i wanted to address was **A rectangular plate of dimensions 6cm*4cm* and thickness 2mm is placed with its largest face on the surface of water. findd the downward force on the plate due to surface tension. surface tension of water is 7*10^-2 N/m**

**A rectangular plate of dimensions 6cm*4cm* and thickness 2mm is placed with its largest face on the surface of water. findd the downward force on the plate due to surface tension. surface tension of water is 7*10^-2 N/m**

**Nirbhay**10th November 2014, 6:42 PM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## can you please guide me through the means to contact topperlearning, i have been given a no. of shikha ma'am and i lost it, now I am having some queries, which i tried to get solved by dialing no., one which is on the site,but it didn't worked. In last question, i wanted to ask why while calculating change in pressure (3*10^5*980) is calculated keeping density uniform for we know pressure= height of vertical column*density* acceleration due to gravity, why density is assumed to be 1g/cm^3 I am worried i am loosing my net question allowed limit,,,,,,by discussing questions again,, tell me pls what is this limit is or give me the no. of shikha ma'am Would you pls answer my second question in this querry???pls

**Nirbhay**7th November 2014, 8:03 PM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

## 1) 2) 3) 4)

**Ram Kumar**22nd April 2014, 10:57 AM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

There are 4 outlet of pipes of same capacity fixed one above the other to a water tank. The 1st pipe is at the bottom level & the 4th pipe is at three-fourth of the height of the tank .The 3rd pipe is equidistant from the 2nd pipe and the 4th pipe. The 2nd pipe is equidistant from the 1st and the 3rd. The capacity of each pipe is such that it can empty a full tank in 4hr. whereas one inlet pipe can fill the empty tank in 1hr. The pipe is opened to fill the empty tank & after 1hr it is closed. Then all the outlet pipes are opened. When the tank is full all the 4 pipes are opened together and shut after 1hr. If the inlet pipe is opened now then the time in which the tank will be full is ………….min?

**sunakshi**30th March 2014, 11:07 PM

### CBSE - XI Science - Physics - Mechanical Properties of Fluids

There are 4 outlet of pipes of same capacity fixed one above the other to a water tank. The 1st pipe is at the bottom level & the 4th pipe is at three-fourth of the height of the tank .The 3rd pipe is equidistant from the 2nd pipe and the 4th pipe. The 2nd pipe is equidistant from the 1st and the 3rd. The capacity of each pipe is such that it can empty a full tank in 4hr. whereas one inlet pipe can fill the empty tank in 1hr. The pipe is opened to fill the empty tank & after 1hr it is closed. Then all the outlet pipes are opened. When the tank is full all the 4 pipes are opened together and shut after 1hr. If the inlet pipe is opened now then the time in which the tank will be full is ………….min?

**sunakshi**28th March 2014, 7:52 AM