Explanation

The sternum helps protect the internal thoracic viscera – such as :

• the heart
• lungs
• esophagus.

The sternum (or breastbone) is a flat bone located at the anterior aspect of the thorax.

It lies in the midline of the chest and has a 'T' shape.

As part of the bony thoracic wall,

Explanation

In assessing the prevalence of protein-energy malnutrition the most practical indicator would be weight for height.

This measurement provides a quick and reliable assessment of acute malnutrition,

as it reflects recent weight changes relative to height. 

Explanation

• The pumping of blood is an involuntary action, meaning it occurs automatically without conscious control.
• The heart pumps blood throughout the body without us having to think about it.

Involuntary actions are those that occur without conscious control, such as:

• Heartbeat
• Breathing (although we can control it voluntarily to some extent)
• Digestion
• Reflexes

Voluntary actions are those that require conscious control, such as:

• Walking
• Talking
• Writing
• Solving math problems

Explanation

A passive smoker inhales smoke from others' cigarettes.

It often in enclosed spaces.

It can lead to similar health risks as active smoking.

Explanation

• Component: Thermistor (specifically an NTC thermistor)
• Why: As temperature rises, more charge carriers become available in the semiconductor material
• Result: Resistance decreases with rising temperature
• Contrast: Most metals do the opposite — resistance increases with temperature (PTC behavior)

Explanation

The Superposition Theorem is applicable to linear response only.

It states that in a linear circuit with multiple sources.

The response (voltage or current) can be calculated by summing the responses due to each source independently.

Explanation

The condition of a fully charged lead-acid battery can be checked by:

Voltage: 2.1-2.2 volts per cell.

Gassing: Battery emits gas when fully charged.

Specific Gravity: 1.260-1.300 in the electrolyte.

Explanation

• A Unijunction Transistor (UJT) has one junction.
• It is commonly used in triggering circuits for thyristors and other semiconductor devices.

Explanation

Polar Capacitor is not a type of capacitor

A polar capacitor is NOT a type of capacitor because it does not exist in the classification of capacitors.

a capacitor is a device that stores electrical energy.

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Explanation

Boiling an egg involves a chemical change.

Because it alters the egg’s proteins, changing its structure and making it solidify.