Solution:

The apple grew inside the bottle. The bottle was placed on the tree branch before the apple was formed.

Solution:

Light

Light can travel through water but doesn't become wet because it's an electromagnetic wave, not a physical object. When light passes through water, it slows down and may change direction due to refraction, but it doesn't get wet because it doesn't have a physical presence or surface to get wet.

Solution:

To make the coin float without touching it, all you need to do is add some salt or sugar to the water and stir until it dissolves. When you do this, the water becomes denser, which means it can support the weight of the coin, making it float up to the surface.

This happens because of something called buoyancy. The denser water pushes the coin upward, balancing the force of gravity that pulls the coin down. As a result, the coin floats without any contact!

So, with a simple trick, you can make the coin rise to the surface, all thanks to the science of density and buoyancy. Isn't physics fascinating?

Solution:

The coin in the 1st bucket. At 25 degrees C water is liquid, while at 25 degrees F it turns into ice.

Solution:

-> Pour the water in the barrel.
-> Freeze it.
-> Pour the milk in the barrel.

Solution:

Oscaru and Austin.

Explanation:
The Chemist hide the name using periodic table as shown in below picture
76-20-44 => Os(76) + Ca(20) + Ru(44)
79-16-22-7=> Au(79) + S(16) + Ti(22) + N(7)

Solution:

Isaac Newton

Explanation:
I + Sack(saac) + Knee(new) + Ton

Solution:

4 Pounds

Explanation
90% of water = 18 pounds
10% of carbon = 2 pounds

Now,
Earlier 10% of carbon is now contributing 50% weight = 2pounds
Therefore weight of water is also contributing 50% weight = 2pounds

Sum = 4 pounds

Solution:

Just release the ball at the top of an incline and the one that reaches bottom will be the solid ball.

Explanation:
The solid ball has a smaller moment of inertia and hence less mechanical energy is spent on rotating the ball and therefore it will reach earlier.

Solution:

Paleontology, the study of fossils