What is objects and classes in OOP?

What is objects and classes in OOP?

A Class in object oriented programming is a blueprint or prototype that defines the variables and the methods (functions) common to all Java Objects of a certain kind. An object in OOPS is a specimen of a class. Software objects are often used to model real-world objects you find in everyday life.

Does a toothpick sink or float?

This is called surface tension. The water molecules in your dish are holding onto each other so tightly that the toothpicks are able to float on top. Adding dish soap breaks apart the bonds that hold the water molecules together.

Does a plastic spoon sink or float?

Jessi: It's true! Since water has it's own density, if something is more dense than the water it's in, it'll sink. The metal spoon and the penny were more dense than the water, so they sank, and the stick and the plastic spoon were less dense than the water, so they floated./span>

Do toothpicks sink?

The toothpicks were reasonably flat so they could float on this layer without breaking the tension. However the soapy toothpick has soap molecules on it and these soap molecules break the surface tension of the water. This break has a ripple effect on the surface of the water./span>

How does the toothpick star trick work?

As the wood absorbs the water, each individual toothpick tries to straighten itself as the soaked fibers expand. This straightening action causes the toothpick ends to push against each other. As the toothpicks straighten and push against each other, the inside of the star opens up into the final star shape.

How do you make a star out of a toothpick?


  1. Bend the 5 toothpicks in the middle but do not break them completely.
  2. Put the 5 broken toothpicks in a circle with the broken points touching one another.
  3. Carefully put a few drops of water in the middle using a dropper or a straw.
  4. Now wait and watch how the toothpicks glide into place to form a star!

Why does dish soap break surface tension?

Detergent and Soap Break Surface Tension The end of the detergent molecule which attaches to fat (grease) repels water molecules. ... This weakens the hydrogen bonds holding the water molecules together at the surface. The result is a break in the surface tension of the water./span>

Why does pepper run from soap?

Pepper is hydrophobic or doesn't dissolve or mix into water. Since water molecules are strongly attracted to each other, or have a high surface tension, it keeps the pepper afloat. Adding soap breaks down the surface tension and as the water molecules spread out away from the soap, they brings the pepper with them./span>

Is soap attracted to water or fat?

The molecules that make up soaps and detergents have two main parts (ends) that behave differently. One end of a soap molecule is attracted to water, while the other components are repelled by water but attracted to fats.

What does SOAP stand for?

Introduction. The Subjective, Objective, Assessment and Plan (SOAP) note is an acronym representing a widely used method of documentation for healthcare providers./span>

Why does dish soap make milk swirl?

When liquid dish soap is added to milk with drops of food coloring on the surface, the soap reduces the surface tension of the milk and reacts with the fat. This interaction causes the fat particles in the milk to move and create swirls of color.

Does soap dissolve fat?

Generally speaking, soaps remove dirt and fats by making them soluble in water. ... Because of the two different parts of the molecule, a soap molecule is soluble in water and at the same time can dissolve fats./span>

Does Soap expire?

Soap does expire, but if it still lathers when you wash your hands, it should be effective. Most commercial store-bought soaps expire after two to three years. Natural or handmade soaps may expire sooner, within one year, as the essential oils and fragrances can get rancid or moldy./span>

What is in soap that cleans?

At the most basic level, soap is a special type of salt derived from vegetable or animal fats or oils—for example, tallow (rendered beef fat), coconut oil, and olive oil are all popular soap bases. The oil or fat is combined with an alkaline metal solution, which breaks it down into the salt./span>

What is a micelle in soap?

When greasy dirt, fat, or oil is mixed with soapy water, the soap molecules arrange themselves into tiny clusters called micelles. ... The water-loving (hydrophilic) head of the soap molecules sticks to the water and points outwards, forming the outer surface of the micelle./span>

What is called micelle?

Micelles are lipid molecules that arrange themselves in a spherical form in aqueous solutions. The formation of a micelle is a response to the amphipathic nature of fatty acids, meaning that they contain both hydrophilic regions (polar head groups) as well as hydrophobic regions (the long hydrophobic chain).