Explanation

Alkaline earth metals: These elements have two valence electrons in their outermost s orbital.

3rd period: In the third period, the outermost shell is the 3rd shell. 

Therefore, the electronic configuration of an alkaline earth metal in the 3rd period is [Ne] 3s².

Explanation

• Physiognomy is the study of the shape and features of the human face, especially with a view to determining a person's character or personality.
• Mensuration refers to the measurement of lengths, areas, and volumes of objects.
• Horology refers to the study of time and timekeeping, especially with regards to clocks and watches.
• Sinology is the study of China, its culture, language, and history.

Explanation

In two dimensions, a force can be resolved into two mutually perpendicular components whose vector sum is equal to the given force.

Explanation

A semiconductor with a large value is called a wide-band-gap semiconductor

Light emitting diode is a 2-lead semiconductor device. 

The name semiconductor comes from the fact that these materials have electrical conductivity between a metal, like copper, gold, etc., and an insulator, like glass.

They have an energy gap of less than 4eV (about 1eV).

Explanation

The angular momentum of an electron by Bohr is given by mvr or nh/2π

where v is the velocity,

n is the orbit in which the electron is revolving, m is the mass of the electron,

and r is the radius of the nth orbit

Explanation

According to the laws of physics, regarding air resistance, two objects of different mass will fall one after another when dropped from the same height.

The heavy ball will fall early as compared to a lighter ball 

SH18-8-2023

Explanation

Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents and catalysts.

Explanation

 Velocity is a vector quantity

Because it requires both magnitude (speed) and direction to be fully defined.

In contrast, speed is a scalar quantity as it only has magnitude.

Explanation

Repeated extraction using portions of solvent is more efficient than using a single large portion of solvent. 

Efficiency in repeated extractions:

When you use small portions of solvent repeatedly, each extraction removes a portion of the solute from the original solution, maintaining a higher concentration gradient for subsequent extractions.

This leads to a more efficient transfer of the solute to the solvent.

Concentration gradient:

By repeatedly adding fresh solvent, you create a higher concentration difference between the solute in the original solution and the solvent, allowing for better transfer of the solute.

Single extraction limitation:

Using a single large volume of solvent may not be as efficient because the solute may not have enough time to fully transfer to the solvent due to a lower concentration gradient. 

Explanation

The x-axis of the graph likely shows Substrate concentration. 

Many enzyme-related graphs depict the relationship between substrate concentration and reaction rate.

The substrate concentration is typically plotted on the x-axis, as it's the independent variable being manipulated to observe its effect on the enzyme activity.

Increasing substrate concentration generally leads to an increased reaction rate until the enzyme becomes saturated.