Thermometer & Expansion

The picture shows a bimetallic strip in a fire alarm. When there is a fire outbreak, the bimetallic strip will get hot, ....

• bend downwards, complete the circuit and the alarm rings.

• bend upwards, open the circuit and the alarm will not ring.

• becomes longer, open the circuit and the alarm will not ring.

What is happening to the fluid inside the thermometer in this image?

• thermal expansion

• thermal contraction

• vaporization

• boiling

Which metal, A or B, expands the most upon heating? And what metal B is it?

• A; Iron

• A; Brass

• B; Iron

• B; Brass

An increase in the volume of a material due to a temperature increase in the material.

• Thermal contraction

• Thermal expansion

• Thermal heat

• Themal latent

Which tool is used to measure thermal energy?

• oven 

• scale

• thermometer

• thermalmeter

In order to calibrate a degrees Celcius thermometer, the lowest fixed point can be found by placing the thermometer in ….

• pure boiling oil

• pure boiling water

• pure water

• pure melting ice

National Electrical Company (PLN) engineer in Jakarta connects an electrical cable between two pylons. The cable is a bit too tight. What could happen to the wire if the weather became very hot?

• The wire slack off as a result of its expansion.

• The wire cracks as a result of its contracts.

• The wire breaks as a result of brittleness.

• The wire’s resistance increases as a result of its contracts.

When ice cube melting or water boiling, the mass will​ .....​

• no change

• reduce

• increase

When ice cube melting or water boiling, the volume will​ .....​

• no change

• increase

• reduce

The temperature will move up​ when thermometer ​​....

• heating

• not change

• cooling