Grade 12Mechanics

A metallic sphere weighs 35g in air and 28.5g in water. Find its relative density and also findits weight in a liquid of relative density 0.9

nidhi

8 Years agoGrade 12

2 Answers

Turbashu Saha

6 Years ago

Given wt. of sphere in air = 35 g

Now, wt. of water of volume equal to that of sphere = apparent loss in weight of sphere

I.e. weight of water of volume equal to that of sphere = 35-28.5 =6.5 g

Therefore relative density = 35/6.5 = 5.4

Now density of water is 1g/cc

Therefore, density of solid sphere = 5.4×1 = 5.4 g/cc

Therefore its volume = 35/5.4 =6.5 g/cc

Now , apparent wt in 2nd liquid = Actual wt- loss in wt in liquid

= (35- 6.5×0.9)

=29.15 g

Vikas TU

6 Years ago

Dear student

density of solid sphere = 5.4×1 = 5.4 g/cc

Density of water = 1 g /cc

So relative density = 5.4 / 1 = 5.4

Hope this will help

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

mechanics

1 Answer Available

Last Activity: 10 Months ago

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11
21
31
41

mechanics

1 Answer Available

Last Activity: 10 Months ago

A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mm
at 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: 3 Years ago

An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of spring
constant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by the
damping 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: 3 Years ago

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

mechanics

1 Answer Available

Last Activity: 3 Years ago

View all Questions

A metallic sphere weighs 35g in air and 28.5g in water. Find its relative density and also findits weight in a liquid of relative density 0.9

nidhi

2 Answers

Turbashu Saha

Vikas TU

Other Related Questions on mechanics

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.11213141

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11
21
31
41