CBSE Class 10 - Chemistry - Acids and Bases - pH of common Acids, Bases and Salts (#cbseNotes)

pH of common Acids, Bases and Salts

The acidity of an aqueous solution relies on the concentration of hydronium ions, [H₃O⁺]. For various products (acids, bases and salts), the magnitude of this concentration varies and pH scale is used conveniently. The pH of a solution is defined as the negative base-10 logarithm of the hydronium ion concentration (in mol/L). Here follows a partial list of pH of common acids, bases and salts.

Solution	PH range
HCL	1.0 - 2.0
Gastric Juices	1.4 - 2.0
Lemon Juice	2.0- 3.0
Vinegar	4.0
Tomato Juice (Oxalic Acid)	4.1
Coffee	5.0
Milk (Lactic Acid)	6.5

Learn English Vocabulary From News Papers - August 5 2017 (Day 6)

Learn English Vocabulary From News Papers - August 5 2017
(Day 6)

The Indian Express

Heritage

In Metro's heritage walks, some architecture, some jalebis

meaning: features or things of past belonging to the culture of a particular society, such as traditions, languages, or buildings (विरासत, धरोहर)


Examples:
1. The Taj Mahal has been designated a world heritage site.
2. Indian classical music is an important part of curltural heritage.

CBSE Class 8 - Science - Stars and Solar System - Stars vs Planets (#cbseNotes)

DIFFERENCE BETWEEN STARS AND PLANETS

Class 8 - Science - Stars and Solar System

Child Psychology and Behavioral Management - A few tips (#parenting)

Child Psychology and Behavioral Management
- A few tips

(Source unknown, shared by a reader.Worth sharing it as blog post)

T

o all parents and even grandparents, as well as teachers, here are some unbelievably simple parenting ideas that work.

1. Children need a minimum of eight touches during a day to feel connected to a parent.

If they’re going through a particularly challenging time, it’s a minimum of 12 a day. This doesn’t have to be a big deal; it could be the straightening of a collar, a pat on the shoulder or a simple hug.

2. Each day, children need one meaningful eye-to-eye conversation with a parent.

It is especially important for babies to have that eye contact, but children of all ages need us to slow down and look them in the eyes.

Learn English Vocabulary From News Papers - August 4 2017 (Day 5)

Learn English Vocabulary From News Papers - August 4 2017
(Day 5)

The Indian Express

Surge

After tomato, surge in onion price likely

meaning: A sudden large increase (बड़ी लहर, आवेश)

Examples:
1. Easy bank loans have surged housing prices in recent months.
2. Tides surged after the storm and flooded the coatal areas.

CBSE Class 12 - Computer Science - C++ Practical Text File Processing - Snippet-8 (#cbseNotes)

C++ Practical
Text File Processing Snippet-8

Question :  Write a program in c++  having a function to calculate the average word size of a text file.

Answer:

CBSE Class 9 - Science - FORCE AND LAWS OF MOTION - Very Short Answer Questions You must Know (#cbseNotes)

FORCE AND LAWS OF MOTION

Class 9 - Physics

Very Short Answer Questions that you must know.


Q1: Give an example that force can make a stationary body move.

Answer: A football can be set to move by kicking it, i.e. by applying a force.



Q2: Name the scientist who experimented with moving balls on a ramp and proved that objects move with constant speed and when no force acts on them.

Answer: Galileo



Q3: Force can change the shape and size of an object. Give an example.

Answer: By hammering, a block of metal can be turned into a thin sheet. By hammering, a stone can be broken into pieces.



Q4: Why does a bicycle slow down when the cyclist stop pedalling? 

Answer: This is because of the frictional forces acting opposite to the direction of motion.



Q5: What are balanced forces?

Answer: If the resultant of applied forces is equal to zero, it is called balanced forces.