Download App

Measurement and Effects of Heat — Science STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8ScienceMeasurement and Effects of Heat3 Marks
Question
Explain why the capillary tube of a clinical thermometer has a constriction.
✓

Answer

When the temperature of a patient is measured with a clinical thermometer, the mercury in the bulb expands and rises in the tube. The small constriction in the thermometer prevents the mercury thread from retreating into the bulb. Thus, the patient’s temperature can be read at ease after removing the thermometer from his body.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following question." from Measurement and Effects of Heat→Measurement and Effects of Heat — all question types→Science STD 8 question papers→Maharashtra Board STD 8 question papers→Maharashtra Board question paper generator→

Similar questions

Liquids have fluidity and they do not have a definite shape. Explain.
→
Why is the opening of a dropper very narrow?
→
In one sample of brass, the following ingredients were found: copper (70%) and zinc (30%). Identify the solvent, solute and solution from these.
→
Which types of pollutants are observed?
→
Plants synthesize glucose in sunlight with the help of chlorophyll from carbon dioxide and water and give away oxygen. Identify the four compounds in this process and name their types.
→
A metal rod 1.8 m long, increases ( in length by 1.4 mm , when heated from $0^{\circ} C$ to $50^{\circ} C$. Find the coefficient of linear expansion of the metal.
→
Explain : Limestone powder disappears on adding to dilute hydrochloric acids.
→
Write any two characteristics of a mixture.
→
Use your imagination and make models of the Milky Way and the solar system.
→
The surface area of a metal plate is $2.4 \times 10^{-2} m^2$ at $20^{\circ} C$. When the plate is heated to $185^{\circ} C$, its area increases by $0.8 cm^2$. Find the coefficient of areal expansion of the metal.
→