Explanation

Acoustics is a branch of physics that deals with the study of sound and its behavior. 

Explanation

 A spectrophotometer measures the amount of light absorbed by a substance at different wavelengths.

It is widely used in plant studies to analyze how leaves absorb specific wavelengths of light, which is crucial for understanding photosynthesis.

Explanation

The theorem you mentioned is known as Pythagoras' Theorem, which states:

$$c^2 = a^2 + b^2$$

where:

• $c$ is the hypotenuse (the longest side of a right-angled triangle).
• $a$ and $b$ are the other two sides.

It was discovered by the ancient Greek mathematician Pythagoras and is fundamental in geometry.

Explanation

Water has a unique property where its density is highest at around 4°C, making it denser than ice (which is solid water)

And the other options like benzene and chloroform at most temperatures. 

Ice is less dense than water: This is why ice floats on water. 

Density definition: Density refers to how much mass is packed into a given volume

Explanation

 Surface tension acts like a "skin" on the water, pulling the molecules at the surface inwards, which naturally leads to a spherical shape as it minimizes the surface area