Physics

The rate of flow of electric charge is measured in Ampere.

At Curie temperature, a ferromagnetic substance is converted into paramagnetic substance.

An especially notable irregular maximum density is that of water, which reaches a density peak at 3.98°C (39.16°F) approximately 4C.

The term galaxy refers to a large collection of stars, dust, and gas clouds which are held together by gravitational attraction.The smallest galaxies may contain only a few hundred thousand stars, while the largest galaxies have thousands of billions of stars. The Milky Way galaxy contains our solar system.

An anemometer is an instrument that measures wind speed and wind pressure. Anemometers are important tools for meteorologists, who study weather patterns.

Cotton clothes are thin and do not have space in which air can be trapped. Thus, cotton clothes do not prevent heat coming out of our body. Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.

The bending of light (i.e. refraction of light) as it moves from water to air makes the water tank appear to be less shallower than its real depth.

Magnetic refrigeration is a cooling technology based on the magneto-caloric effect. This technique can be used to attain extremely low temperatures, as well as the ranges used in common refrigerators, depending on the design of the system. The magnetocaloric effect (MCE, from magnet and calorie) is a magneto-thermodynamic phenomenon in which a change in temperature of a suitable material is caused by exposing the material to a changing magnetic field. This is also known by low temperature physicists as adiabatic demagnetization, due to the application of the process specifically to create a temperature drop

Fog is tiny water droplets or ice crystals suspended in the air at or near the Earth’s surface. Hence, fog is an example of a colloidal system liquid dispersed in gas.

Materials that allow electricity to flow are called conductors.