Activity 8.11:
Aim: To study the effect of depth on pressure in liquids.
Material: Water
Apparatus: 50 cm rubber tube, basin and 1 000 ml measuring cylinder
Instruction
1. Fill a measuring cylinder to the maximum volume and turn it upside down as shown in Figure 8.47.
2. Put one end of a rubber tube into the measuring cylinder.
3. Blow air into the other end of the rubber tube. Observe the change in size of the air bubbles rising from the bottom to the water surface.
Questions
1. Compare the size of the air bubbles at the bottom of the basin and at the water surface.
2. State the relationship between volume of air bubbles and its depth in the water.
3. Explain this phenomenon in relation to pressure in liquids.
Answer:
1. Size of air bubbles at the bottom of the basin is smaller than the size of air bubbles nearer to the water surface.
2. Volume of air bubbles decreases as the depth of water increases.
3. Pressure in liquid increases as the depth of liquid increases.
Aim: To study the effect of depth on pressure in liquids.
Material: Water
Apparatus: 50 cm rubber tube, basin and 1 000 ml measuring cylinder
Instruction
1. Fill a measuring cylinder to the maximum volume and turn it upside down as shown in Figure 8.47.
2. Put one end of a rubber tube into the measuring cylinder.
3. Blow air into the other end of the rubber tube. Observe the change in size of the air bubbles rising from the bottom to the water surface.
Questions
1. Compare the size of the air bubbles at the bottom of the basin and at the water surface.
2. State the relationship between volume of air bubbles and its depth in the water.
3. Explain this phenomenon in relation to pressure in liquids.
Answer:
1. Size of air bubbles at the bottom of the basin is smaller than the size of air bubbles nearer to the water surface.
2. Volume of air bubbles decreases as the depth of water increases.
3. Pressure in liquid increases as the depth of liquid increases.