Physical properties are characteristics of matter that can be observed or measured without changing the substance’s chemical composition. Examples of physical properties include color, texture, odor, density, melting point, boiling point, and conductivity.
Color is the way an object reflects or absorbs light, leading to the perception of different wavelengths as different colors. Texture refers to the feel or appearance of a substance, such as rough, smooth, or bumpy. Odor is the specific scent a substance emits. Density is a measure of how closely packed the particles in a substance are, with denser substances having more mass per volume.
Melting point is the temperature at which a solid substance changes to a liquid, while boiling point is the temperature at which a liquid changes to a gas. Conductivity is the ability of a material to conduct electricity or heat.
These physical properties can be useful for identifying and classifying different substances. They also play a crucial role in determining how materials behave under certain conditions, such as temperature or pressure changes. Understanding physical properties is essential in fields like chemistry, physics, and materials science.
What are the 7 properties of matter and examples?
Physical Properties of Matter Colour, density, volume, mass, boiling temperature, and melting point are the six main physical properties. Shape, size, hardness, flexibility, texture, odour, temperature, volume, length, freezing point, electrical conductivity, and so on are some further examples.
What are included in the physical properties of a substance Class 7?
– color.
– shape.
– volume.
– density.
– temperature.
– boiling point.
– viscosity.
– pressure.
What are physical properties of a substance Class 7?
– color.
– shape.
– volume.
– density.
– temperature.
– boiling point.
– viscosity.
– pressure.
What words are the 7 main physical properties defined by?
Physical properties of matter include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point.Aug 2, 2022
Is there a quick test for TB?
A rapid sputum test can tell if a person has TB within 24 hours. A test may be done when: A person is thought to have TB, but confirmation is needed before sputum culture results will be ready. A person may be infected with bacteria other than TB bacteria.
What is the rapid diagnostic test for TB?
People diagnosed with TB using rapid molecular tests recommended by WHO (1), lateral flow urine lipoarabinomannan (LF-LAM) assays, sputum smear microscopy or culture are defined as “bacteriologically confirmed” cases of TB (2).
How accurate is the TB rapid test?
Sensitivity of NAATs, using culture as a gold standard test, is 95% in smear-positive patients (6, 7) and varies between 50–80% in smear-negative patients (4, 8). Although the specificity of NAATs is quite high (6, 18) but it has not been recommended for routine TB diagnosis due to its inconsistent accuracy (8, 9).
What is the fastest test for TB?
A normal sputum culture can take 1 to 8 weeks to provide results. A rapid sputum test can tell if a person has TB within 24 hours.
