Explanation

 Convection is the transfer of heat through the movement of a fluid, meaning it occurs in liquids and gases. 

Liquids: In liquids, warmer, less dense molecules rise, carrying heat with them. 

Gases: Similarly, in gases, hot molecules move more readily, transferring heat through the space

Explanation

Pyruvic acid has 3 carbon atoms. 

Its molecular formula is:

C3​H4​O3​

The “C₃” shows there are 3 carbon atoms in one molecule of pyruvic acid.

Explanation

The name hydrocarbon itself comes from "hydro" (hydrogen) and "carbon" (carbon atoms).

They are organic compounds made only of these two elements.

Explanation

 Prokaryotic cells lack membrane-bound organelles like chloroplasts.

Chloroplasts are organelles found in eukaryotic cells, specifically plant cells, and are responsible for photosynthesis.

Prokaryotic cells, while simpler in structure, do possess other components such as"

• Ribosomes (for protein synthesis)
• A cell wall (for structural support)
• DNA (although not contained within a nucleus) 

Explanation

To convert sunlight into usable energy, photovoltaic cells (solar cells) are used;

Photovoltaic technology utilizes the principles of the photoelectric effect to capture free electrons and convert their movement into the current.

Explanation

Gamma rays consist of Photons.

They are weightless packets of pure energy that are emitted from an unstable atomic nucleus and are part of the electromagnetic spectrum,

Similar to X-rays but with higher energy. 

Explanation

Silicon is a chemical element with the symbol Si and atomic number 14.

Silicon dioxide (SiO₂) is the primary component in glass, making it transparent and durable.

It is obtained from sand (quartz).

It is essential in glass manufacturing

Explanation

 The drag force is given by Stokes' Law. 

Stokes' Law is a formula that describes the drag force on a spherical object moving slowly through a viscous fluid.

And it states that this force is directly proportional to the object's velocity,

The radius of the sphere and the viscosity of the fluid. 

Explanation

In a reversible adiabatic process, there is no heat exchange with the surroundings, meaning the system is isolated in terms of heat.

Since entropy is a measure of:

• heat energy dispersal
• no heat is exchanged
• the entropy change in a reversible adiabatic process is zero.
  

Explanation

Diamagnetic materials are repelled by a magnetic field and do not retain magnetic properties.

Copper is a classic example of a diamagnetic substance.