What does the term "pascal" measure in the International System of Units (SI)?

In which medium does sound travel fastest?

In the context of electricity, what does AC stand for?

What is the primary source of energy for the Earth's climate system?

What is the principle behind the functioning of a magnifying glass?

What is the relationship between frequency (f) and wavelength (λ) in a wave?

What is the term for the process by which a star exhausts its nuclear fuel, expands, and then contracts, expelling its outer layers into space?

What is the law of reflection for light?

What is the name of the theory that explains the origin of the universe, suggesting an initial singularity followed by rapid expansion?

In optics, what is the term for the point at which parallel light rays either converge or appear to diverge after passing through a lens?