To determine the density of solid (denser than water) by using a spring balance and a measuring cylinder - Science Practicals
Aim
To determine the density of solid (denser than water) by using a spring balance and a measuring cylinder.Theory
Density = Mass of the substance/Volume of substance
If D is density of a body of mass M and volume V, then D = M/V
In S.I. units density is expressed in kg/m3.
For example, Density of water is 1000 kg//m3
To determine the density of an object, we have to measure two quantity mass and volume.
Materials Required
A spring balance of appropriate range, a solid body (a piece of stone), thread, water and graduated cylinder of appropriate range.
Procedure
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A. For determining mass 'Al' of the solid body by using a spring balance.
Step 1: Take a spring balance of appropriate range.
Step 2: Find the number of divisions between two long graduation marks on the scale of the spring balance and find its least count.
Step 3: Tie a thread to the given solid body (a piece of stone) and suspend it from the hook at the lower end of the spring balance. Note the reading of the pointer on the scale of the spring balance. Let it be 'W'. Thus 'W' is the weight of the given solid body in g wt. Mass of the solid body is W grams. Thus, M = W×10-3 kg.
Step 4: Repeat the observations two more times.
B. For determining the volume of the given solid body by measuring cylinder
Step 1: Take a graduated cylinder of suitable range and note down its least count.
Step 2: Pour some water into the cylinder and note the initial level of water in the cylinder. Take the reading at the lower meniscus of water (P) on the graduated cylinder. Let it be V1.
Step 3: Now immerse the solid fully in water without touching the side walls of the cylinder. The level of water rises. Note the reading at lower meniscus of water level (Q) on the graduated cylinder. Let it be V2.
Step 4: Repeat the observations for two more times.
Step 5: Record the observations in tabular form as detailed further for both parts (a) and (b).
Precautions
1. The measuring cylinder must be dry and clean.
2. The scale of the spring balance should be adjusted to read zero initially.
3. Take the reading only when the body comes to rest.
4. Only the lower meniscus of the water level should be read.5. The body should fully immerse in the water, the solid body should not touch the sides or base of the cylinder.
6. The solid piece should be wiped with a dry cloth before repeating the activity.
A spring balance of appropriate range, a solid body (a piece of stone), thread, water and graduated cylinder of appropriate range.
Procedure
A. For determining mass 'Al' of the solid body by using a spring balance.
Step 1: Take a spring balance of appropriate range.
Step 2: Find the number of divisions between two long graduation marks on the scale of the spring balance and find its least count.
Step 3: Tie a thread to the given solid body (a piece of stone) and suspend it from the hook at the lower end of the spring balance. Note the reading of the pointer on the scale of the spring balance. Let it be 'W'. Thus 'W' is the weight of the given solid body in g wt. Mass of the solid body is W grams. Thus, M = W×10-3 kg.
Step 4: Repeat the observations two more times.
B. For determining the volume of the given solid body by measuring cylinder
Step 1: Take a graduated cylinder of suitable range and note down its least count.
Step 2: Pour some water into the cylinder and note the initial level of water in the cylinder. Take the reading at the lower meniscus of water (P) on the graduated cylinder. Let it be V1.
Step 3: Now immerse the solid fully in water without touching the side walls of the cylinder. The level of water rises. Note the reading at lower meniscus of water level (Q) on the graduated cylinder. Let it be V2.
Step 4: Repeat the observations for two more times.
Step 5: Record the observations in tabular form as detailed further for both parts (a) and (b).
Precautions
1. The measuring cylinder must be dry and clean.
2. The scale of the spring balance should be adjusted to read zero initially.
3. Take the reading only when the body comes to rest.
4. Only the lower meniscus of the water level should be read.5. The body should fully immerse in the water, the solid body should not touch the sides or base of the cylinder.
6. The solid piece should be wiped with a dry cloth before repeating the activity.