FrictionFriction is an opposing force that exists between two surfaces which are in contact. It helps us a lot in doing many activities. There are 4 types of friction.1) Static frictionThis friction occurs when two or more solid objects rest on the ground, and not moving relative to each ... Read More

To do: Find all natural number that are 13times greater than their last digitSolution:For two digit number Let ten's place digit be $x$, and unit's place digit be $y$ $10x+y = 13y$ $x=\frac{12y}{10}$ You can substitute $y = 5,  x = 6$ So the number will be 65

Static electricity is produced as a result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit.

Opaque objectsAn opaque object is neither transparent (allowing all light to pass through) nor translucent (allowing some light to pass through), it just does not allow any light to pass through it.  Examples- wood, iron sheet, a brick wall, etc.

The respiratory system is a biological system that consists of specific the organs and parts of the body involved in an exchange of oxygen and carbon dioxide. The human respiratory system consists of nose, larynx, pharynx, trachea, bronchi, and lungs. Respiration is an exchange of gases between an organism and ... Read More

An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials.There are two general types of aquifers: 1. Confined aquifers have a layer of impenetrable rock or clay above them. 2. Unconfined aquifers lie below a permeable layer of soil. Groundwater can be extracted using a water ... Read More

Given: $ \frac{1}{2}-\frac{1}{3}(x-1)+2=0 $To do: Find $x$.Solution:$ \frac{1}{2}-\frac{1}{3}(x-1)+2=0 $$ \frac{1}{2}-\frac{1}{3}x +\frac{1}{3}+2=0$$\frac{1}{2}+\frac{1}{3}+2=\frac{1}{3}x$LCM of 2 and 3  is 6$\frac{3+2+6}{6}=\frac{1}{3}x$$\frac{11}{6}=\frac{1}{3}x$Cross multiplying 3 to LHS$3\frac{11}{6}=x$$\frac{11}{2}=x$Therefore, the value of $x$ is $\frac{11}{2}$

Subtraction is not commutative for integers. That is, for any two integers p and q, p – q ≠ q – p Example: For two integers 9 and 7, their subtraction, 9 – 7 ≠ 7 – 9 (Subtraction is not commutative) Subtraction is not associative for integers. That ... Read More

Microscopic organisms, commonly known as microorganisms or microbes, are found all around us and even inside our bodies.The category 'Microbes' includes a massive range of organisms including bacteria, fungi, viruses, algae, archaea and protozoa.Microbes grow and reproduce in habitats where no other organisms can survive.Microbes also are found in more ... Read More

Given: 1087 x 45To find: We have to find the value of 1087 x 45.Solution:        1 0 8 7       x    4 5   -------------      5 4 3 5+ 4 3 4 8-------------   4 8 9 1 5-------------