1800-150-456-789
FlagBACK
Flag Mechanics> EXCELLENT PROBLEM SIR,PLEASE HELP ME IN I...
question mark

The water level in a 24 cm diameter tank is initially at a height of 10 cm. As a first grade science experiment, the students are asked to float a CD on the water. The CD has a diameter of 12 cm, a mass of 16 grams, and a density 1.2x that of water. CDs are highly hydrophobic and they float through surface tension even though they are denser than waterAfter they float the CD, one of the students experiments by adding 4 pennies totaling 8 grams to the CD.What will be the new surface level of the water be, at points relatively far away from the CD? (3 cm is a reasonable distance)

sohan singh singh , 14 Years ago
Grade 12
anser 2 Answers
Chetan Mandayam Nayakar

Last Activity: 14 Years ago

Let h be the height of water below and close to the CD, and H the height at far away points.

π(92)h + πH(122-92) =π(122)10

πρg(H-h)*62 = 24g

Solving the above two simultaneous equations, we get H= 10+(3/8π) = 10.12cm

Win exciting gifts by answering the questions on Discussion Forum.

Vijay Luxmi Askiitiansexpert

Last Activity: 14 Years ago

Dear Sohan,

Let h be the height of water below and close to the CD, and H the height at far away points.

π(92)h + πH(122-92) =π(122)10

πρg(H-h)*62 = 24g

Solving the above two simultaneous equations, we get H= 10+(3/8π) = 10.12cm

 

Now Win exciting gifts by answering the questions on Discussion Forum.

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on mechanics

question mark
A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mmat the free end, where a small mass of 2 g is positioned. determine(i) The velocity of the end when passing through the zero position(ii) The acceleration at maximum displacement(iii) The maximum kinetic energy of the mass
mechanics
2 Answers Available

Last Activity: 2 Years ago

question mark
An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of springconstant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by thedamping constant b = 0.07kg/s.(i) Find the period of the damped oscillation.(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?
mechanics
1 Answer Available

Last Activity: 2 Years ago

question mark
If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0
mechanics
1 Answer Available

Last Activity: 2 Years ago

question mark
A particle is traveling in a circle of radius R =2.5m and with an angular velocity of 10 rad/s. What is the centripetal acceleration of the particle? The particle begins to slow down with an angular acceleration of -1 rad/s2. After 5 seconds, what is the centripetal acceleration and the tangential acceleration fo the particle?
mechanics
1 Answer Available

Last Activity: 2 Years ago

question mark
If the acceleration of block A is 5 m/s^2Find the acceleration of block B
mechanics
1 Answer Available

Last Activity: 2 Years ago