CBSE Class 8 - Science - Friction (Assignment) (#cbseNotes)

Friction (Assignment)

Q1: Name the following:

⒜  Type of surfaces that produces minimum friction _____________

⒝  Type of surfaces that produce maximum friction  _____________

⒞  A shape that reduces drag _____________

⒟ Friction with minimum magnetic magnitude _____________

⒠  Friction with maximum magnitude _____________

⒡  Two types of fluids _____________

CBSE Class 11 - Physics - Work, Energy and Power (Assignment-1) (#cbseNotes)

WORK ENERGY POWER (Assignment-1)

Q1. A water pump lifts water from a level 10 m below the ground. Water is pumped at a rate of 30
kg/minute with negligible velocity. Calculate the minimum horse power the engine should have to
do this?

Answer: 6.6 × 10⁻² hp

Q2. A man weighs 60 kg. Calculate work done by gravity as he climbs a ladder of heights 5m.

Answer: -2940 J

Q3. A body of mass 0.3 kg is taken up an inclined plane of length 10 m and height 5 m, and then allowed
to slide down to the bottom again. The coefficient of friction between the body and the plane is 0.15
What is the
(a) Work done by the gravitational force over the round trip?
(b) Work done by the applied force on the upward journey?
(c) Work done by the frictional force over the round trip
(d) Kinetic energy of the body at the end of the trip?

Answer: zero, 18.5 J, -7.6J, 10.9J

Q4. A pump can throw up 10 quintals of coal per hour from a coal mine 120 m deep. Calculate the power of the engine in watt assuming that efficiency is 80%.

Answer: 408.3 watt

CBSE Class 8 - Social Science - Indian Constitution - Salient Features (#cbseNotes)

Salient Features of the Constitution

T

he Indian Constitution closely follows the British parliamentary model but differs from it in one important respect that is the Constitution is supreme, not the parliament. The Indian courts are vested with authority to act as a judge on the constitutionality of any law passed by parliament.

The present constitution consists of the following:
① The Preamble
② 25 Parts covering 448 articles
③ 12 Schedules and
④ 5 Appendices containing the Panchayats and schedule XI (Articles 243 G)

The parliament of India adopted the constitution on 26th November 1949. The constitution became fully operational with effect from 26th January 1950.

In September 2016, there has been 101st amendment (GST Bill) to the Constitution of India. The salient features of Indian constitution are listed as follows:

① Written Constitution
② Lengthy document
③ Drawn from different sources
④ A Federal Polity with unitary bias
⑤ Single citizenship
⑥ More flexible than rigid
⑦ A Democratic Republic
⑧ Balance between Judicial Supremacy and parliamentary
⑨ Universal adult franchise
⑩ Secular state
⑪ provision of provision of fundamental rights
⑫ Principles for a welfare state
⑬ Incorporation of fundamental duties
⑭ Emergency provisions
⑮ Protection of minorities
⑯ Provision for autonomous organisation

CBSE Class 12/NTSE - Macroeconomics - Money and Banking - Inflation Related Terms (#cbseNotes)

Inflation Related Terms

Deflation 
Deflation is that state of the economy where the value of money is rising or the prices are falling.


Hyperinflation
Extremely Rapid and out of control inflammation inflation is said to be hyperinflation.


Stagflation 
A condition of slow economic growth and relatively high unemployment - a time of stagnation - accompanied by a rise in prices on inflation.

CBSE Class 6 - Science - The living Organisms and Their Surroundings (Worksheet) (cbseNotes)

The living Organisms and Their Surroundings (Worksheet)

Based on NCERT Class 6 Science Textbook 

Fill in the blanks by choosing the right word from the following set of words. 

terrestrial, blowholes, gills, abiotic, ostrich, pines, habitat, stimuli, aquatic, webbed, omnivores, casuarina, locomotion, excretion, chicken

① The surroundings where plants and animals live, is called their _________.

② ___________ egg is the biggest cell in nature.

③ There are many types of habitats, however, these may be broadly grouped as __________ (on the land) and ________ (in water).

④ _________ are the respiratory organs of fish.

CBSE Class 12 - Computer Science - C++ Practical Class Design Snippet-5 (#cbseNotes)

C++ Practical
Class Design Snippet-5

Question :  Write a program to open a file in C++ "Hello.dat" and write

This is only a test
Nothing can go wrong
All things are fine

into the file. Read the file and display the contents.

Answer:

CBSE Class 8 - Science - Friction (MCQs) (#cbseNotes)

Friction (MCQs)

CBSE Class 8 - Science

Q1: The force of friction which opposes the surfaces just to slide one over the other, is called:

   (A) Limiting friction.
   (B) Rolling friction
   (C) Sliding friction
   (D) All of these.



Q2: What is the most common way to reduce friction?

(A) Lubrication.
(B) Warning signs.
(C) Eliminate the motion.
(D) None of these.



Q3: Do you want to increase or decrease friction when riding a bicycle?

(A) Increase.
(B) Both.
(C) Decrease.
(D) None of these.