Explanation

Oximeter is used to measure the oxygen level in blood & heart rate. 

Pulse oximeters can be attached to your fingers, forehead, nose, foot, ears or toes.

The device may then be reused or disposed of.

Explanation

Electric field intensity is defined as force per unit charge (N/C) or potential difference per unit distance (V/m).

So, V/m is an equivalent.

It is commonly used unit for electric field intensity.

Explanation

Badar is an Urdu/Arabic term meaning full moon.

It refers to the complete visible Moon in the sky (Full Moon phase).

Explanation

Two or more forces acting on the same point at the same. time are called concurrent forces.

While

A concurrent coplanar force system is a system of two or more forces whose lines of action intersect at a common point.

Explanation

• A lake starts freezing because of the cold atmosphere. It will first freeze At the top surface
• ***
• concept:
• when the water freezes to ice, the ice becomes significantly less dense than the water and continues to float on the lake's surface.
• Below 4° Celsius, water becomes less dense as it gets colder, causing water to freeze to float to the top.
  
  

Explanation

The Moon is Earth's natural satellite, orbiting our planet.

It reflects sunlight but does not produce its own light like a star.

Explanation

Solar eclipse glasses have lenses coated with black polymer or silver Mylar to safely block 99.99% of sunlight.

These coatings protect eyes by filtering harmful UV and infrared rays during the eclipse.

Explanation

The Earth's atmosphere is divided into five main layers: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.

Each layer has unique characteristics such as temperature, density, and composition.

Explanation

A lock is a device used for raising and lowering boats,

ships and other watercraft between stretches of water of different levels on river and canal waterways.

Explanation

Gravitational force is the natural force of attraction between any two masses in the universe.

This force is always attractive.

It acts along the line joining the centers of the two masses.