Explanation

The electrostatic force between two electrons is F Newton, and since protons have the same charge magnitude as electrons (but opposite sign).

The force between two protons at the same distance is also F Newton.

Explanation

The order of speed of sound in different mediums, from fastest to slowest, is:

• Solid (approximately 3000-6000 m/s)
• Liquid (approximately 1000-3000 m/s)
• Gas (approximately 300-400 m/s)

Explanation

These six quantities (length, mass, electric current, time, intensity of light, and amount of substance) are the fundamental base quantities in the International System of Units (SI).

They are the basic building blocks of the SI system and are used to define all other quantities.

Explanation

The current produced in a coil due to electromagnetic induction is called an induced current.

The induced current can be positive or negative depending on the direction of the change in magnetic flux and the orientation of the coil

However, the term "induced current" is used to refer to the current that flows

As a result of electromagnetic induction, regardless of its direction being positive or negative

Explanation

The correct way to write units is to use the SI (International System of Units) standard

Where the symbols for units named after persons are capitalized, and the symbols for other units are lowercase.

Therefore, the correct option is d. 43 kg m³. 

Explanation

The device that can be used for precise measurement of wavelength is a Michelson Interferometer. 

A Michelson interferometer uses the interference of light waves to measure very small distances, including wavelengths, with high accuracy. 

Explanation

• The Milky Way galaxy is spiral in shape.
• It consisting of a central bar-shaped structure and a disk of stars, gas, and dust that spirals outward in a logarithmic spiral pattern.

Explanation

Photosynthesis splits water molecules (H2O) into oxygen (O2) and hydrogen ions (H+), releasing oxygen as a byproduct.

This process is essential for life on Earth, as it provides the oxygen that supports aerobic respiration in most living organisms.

Explanation

Long-sightedness is also known as hyperopia.

It is a vision defect where the image is formed beyond the retina, rather than directly on it.

This occurs when the eyeball is too short or the cornea is too flat, causing light to focus at a point behind the retina.

As a result, close objects appear blurry, while distant objects may remain clear.

Explanation

An echo is caused by the reflection of sound waves off a surface or object.

When sound waves reach a surface, some of the energy is reflected back, creating an echo.

This reflected sound wave then travels back to the listener, arriving later than the original sound, causing the echo effect.