Explanation

The diagnostic test typically used for rheumatic fever is ASO (Anti-streptolysin O) titer.

Rheumatic fever is an autoimmune inflammatory disease

That can develop after a group A streptococcal infection, such as strep throat. 

The ASO titer measures the antibodies produced in response to a recent streptococcal infection.

Elevated ASO titers indicate recent streptococcal infection and are a key diagnostic marker for rheumatic fever.

Explanation

• The fulcrum placed between the force and load is called Class One Lever
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• In a first-class lever, the fulcrum is located between the load and the effort
• examples of first-class levers are pliers, scissors, a crow bar, a claw hammer, a see-saw, and a weighing balance.
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• The force placed between the load and the fulcrum is called Class Three Lever
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Explanation

Manifest and latent functions are social scientific concepts created by anthropologist, Bronislaw Malinowski in 1923 while studying the Trobiand Islanders in the Western Pacific.

Explanation

 The functional group present in aldehydes is the aldehyde group, which is represented as -CHO.

This group consists of a carbonyl group (C=O) where the carbon atom is bonded to at least one hydrogen atom. 

Explanation

Carbon monoxide has a much higher affinity for hemoglobin than oxygen,

Meaning it binds to the hemoglobin molecule more readily,

Effectively prevents oxygen from binding and reduces the blood's ability to carry oxygen. 

Explanation

Brewster’s angle is the angle of incidence at which light with a particular polarization is perfectly transmitted through a surface with no reflection.

At this angle, the reflected and refracted rays are perpendicular (90° apart).

Explanation

The speed of sound in a gas is proportional to the square root of temperature (in Kelvin):

v ∝ √T

If the temperature becomes 16 times, then:

New speed = √16 × original speed = 4 × original speed

Explanation

 Ferromagnetic materials are those that can retain a permanent magnetization even after an external magnetic field is removed.

This property is due to the aligned magnetic domains within the material.

Iron (Fe), Cobalt (Co), and Nickel (Ni) are all ferromagnetic.

Antimony (Sb), on the other hand, is not ferromagnetic; it is classified as diamagnetic, meaning it repels a magnetic field. 

Explanation

Molten NaCl conducts electricity because of the presence of free ions. 

When sodium chloride (NaCl) melts, the ionic bonds holding the sodium (Na+) and chloride (Cl-) ions together break, allowing them to move freely within the liquid.

These mobile ions can carry electrical charge, thus enabling the molten salt to conduct electricity. 

Explanation

 A LASER beam can be sharply focused because it is highly coherent. 

Coherence refers to the well-organized nature of light waves in a laser beam, where all the waves are in phase with each other, allowing them to be concentrated into a small, focused spot