Explanation

An electroscope detects the presence and type of electric charge on a body.

It shows whether the charge is positive or negative by the movement of its leaves.

Explanation

• A photometer is an instrument used to measure the intensity of light.
• It typically in units of luminous flux (lm) or illuminance (lux).
• It is commonly used in various fields such as photography, lighting design, and scientific research to quantify light levels.

Explanation

Sedimentary rocks are also called stratified rocks.

Explanation

We are given:
A wire with resistance R = 6 Ω
It is cut into two equal parts
These two parts are then connected in parallel

Step 1:

Resistance of each half
When a wire is cut into two equal parts, the resistance of each half becomes half:
Rhalf​=6/2​=3Ω

Step 2:

Two 3 Ω resistors in parallel
Use the formula for two resistors in parallel:
Req​1​=1/3​+1/3​=2/3​

Req​=3/2​=1.5Ω

Explanation

The "slinky approximation" refers to a model

Where a spring (like a slinky) is considered to be composed of a series of small masses connected by massless springs

And its stretched length is significantly larger than its original unstretched length.

This approximation is useful for studying the dynamics of slinkies, particularly when the stretches are large. 

Explanation

Diphtheria is a bacterial infection caused by Corynebacterium diphtheriae.

It affects the respiratory system.

It can lead to serious complications if untreated.

Explanation

The other name for Newton's second law is the law of force and acceleration.

Explanation

• Isotopes of an element have the same atomic number (number of protons).
• It means they have the same chemical properties and are considered the same element.

Explanation

A group of organisms of one species occupying a defined area is termed a population.

In nature, we rarely find isolated, single individuals of any species.

The total number of people living in an area, city, country, or the world at a specific time is called Population. 

***

ND1-2-2023

Explanation

Adenosine triphosphate (ATP) is the primary energy currency in a cell.

It stores and transfers energy within cells, powering various biological processes such as:

• muscle contraction
• protein synthesis
• cell division