Explanation

A body moving in a circular path with constant speed has variable acceleration. 

While the speed remains constant, the direction of the velocity vector is constantly changing as the body moves around the circle.

Since acceleration is the rate of change of velocity, and velocity is changing (even though speed is constant),

The body experiences a constant magnitude of acceleration

But the direction of that acceleration changes at every point on the circle.

This makes the acceleration variable. 

Explanation

Affinity for oxygen refers to how readily an element or compound combines with oxygen.

Magnesium (Mg) is a highly reactive alkaline earth metal that readily loses its two electrons to form a positive Mg2+ ion.

This ion then readily combines with oxygen to form magnesium oxide (MgO), demonstrating a strong affinity for oxygen. 

Explanation

NMR spectroscopy provides detailed information about the connectivity of atoms within a molecule,

Including the types of carbon and hydrogen atoms present, their relative positions, and the presence of functional groups.

This level of detail allows for a comprehensive understanding of a molecule's structure, making it significantly more informative than the other options. 

Explanation

 The bacterial phase of inactive growth, where bacteria prepare for division, is called the lag phase.

During this phase, bacteria are not actively multiplying but are instead adjusting to their new environment, synthesizing necessary enzymes and molecules, and potentially repairing any damage. 

Explanation

A dressing is primarily used to:

• Control bleeding by applying pressure.
• Cover the wound to prevent contamination and infection.

Options B (Close airway) and C (Stop body fluid flow) are incorrect

Explanation

In a renal transplant, regulating protein intake is crucial to minimize strain on the transplanted kidney.

Excessive protein consumption can lead to complications such as proteinuria and kidney damage.

Explanation

Metalloids are known to have electronic band structures that are similar to semimetals or semiconductors.

Metalloids are known to form amphoteric or weakly acidic oxides.

These elements have the ability to form metallic alloys.

ND18-9-2023

Explanation

A transformer operates on the principles of “electromagnetic induction”, in the form of Mutual Induction.

Mutual induction is the process by which a coil of wire magnetically induces a voltage into another coil located in close proximity to it.

Explanation

three  classes of Levers

• Class One Lever
• Class Two Lever
• Class Three
• The force placed between the load and the fulcrum is called Class Three Lever
• ***

• The fulcrum placed between the force and load is called Class One Lever
• ***

Explanation

3 % of Earth's water is fresh.

2.5% of the earth's freshwater is unavailable:

locked up in glaciers,

polar ice caps,

atmosphere,

and soil;

lies too far under the earth's surface to be extracted at an affordable cost.

0.5% of the earth's water is available in freshwater.

ND27-7-2023