Pericardium

The heart is enclosed by a sac-like covering called as pericardium. It has 2 layers. The outer layer is more fibrous and is called as a parietal layer. 
The inner layer is smooth and is called as a visceral layer. Pericardium protects the heart from mechanical injury and helps in the movement of the heart walls.

‘Cardboard’ in the poem refers to the photograph. This word has been used because photograph is now just a piece of paper with the memory as the poet's mother is dead now. It shows that human life is transitory and the cardboard which remains is memorable piece of paper.

Prepare an Accounting Equation from the following:
i. Started business with cash Rs.1,00,000.
ii. Purchased goods for cash Rs.20,000 and on credit Rs.30,000.
iii. Sold goods for cash costing Rs.10,000 and on credit costing Rs.15,000 both at a profit of 20%.
Solution:

 

Area of a circle can simply be evaluated using following formula.

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Ohm’s law : When the physical conditions such as temperature etc. remain same, the current flowing through the conductor is directly proportional to the potential difference applied across the ends of the conductor, i.e.,

I ∝ V or V ∝ I

⇒ V/I = constant

⇒ V = IR

Where R is constant of proportionality and is called resistance of the wire.

Necessary condition for validity of Ohm’s law is that physical condition such as temperature of the conductor remains same. 

Procedure: Experiment to verify ohm's law 

Procedure : 1. Connect the various components as. 

2. Close the sky, so that current begins to flow in the circuit. 

3. Note down the potential difference (V) across the conductor PQ of resistance R shown by the voltmeter and the corresponding current (I) shown by the ammeter. 

4. Now move the knob of rheostat so that the current in the circuit increases. 

5. Again note down the potential difference (V) across the conductor R in the voltmeter and current in the circuit shown by ammeter. 

6. Repeat the experiment five times by increasing the current in the circuit by moving the knob of the rheostat in steps. 

The value of V/I = R (constant) Plot a graph between V and I by taking V along X- axis along. We get a straight line passing through origin.

Conclusion : From the graph between V and I, we conclude that I = V, which is Ohm's law. Hence Ohm's law is verified experimentally. Ohm's law does not hold under all conditions. Ohm's law does not hold for non-ohmic material such as electrotyte.

Ans:Algu heard the case and gave a fair judgement. He asked Jumman either to pay a monthly allowance to his aunt or transfer the property in her name. Jumman was stunned. He became Algu’s enemy. He decided to take revenge on Algu.

Some of the major features of a democracy are:

• The final decision making power rests with those elected by the people.
• It must be based on a free and fair election.
• Each adult citizen must have one vote and each vote must have one value.
• It should rule within limits set by constitutional law and citizens’ rights.

Consequences of environmental degradation do
not respect national or state boundaries and can be seen in other parts of the country or world. This can be understood by following points
(i) Land degradation affects the agricultural productivity of land as well as food security. Food requirement of that region will be completed by importing food from other regions. It will create additional pressure on the land resources of exporting regions.
(ii) Addition of greenhouse gases in atmosphere is responsible for increase in temperature. It affects every part of the world whether it is developed or developing country.
(iii) Addition of chlorofluoro carbons in atmosphere is responsible for ozone depletion in Antarctic region. Although source region of CFC can be any part of the world, it is a serious issue of concern for whole world.
(iv) Pollution of water affected the availability of water in whole world.
(v) Pollution of air has created respiratory diseases in humans of all parts of the world because harmful gases imbalanced the composition of atmosphere.

Increase in heart size: Regular exercises develop the muscles of the heart. It increases the size of the heart along with the strengthening of heart. The heart becomes efficient in doing its job.

The decrease in cholesterol level: Regular exercise reduces the level of cholesterol in Our blood. The level of cholesterol in our blood is directly linked with blood pressure. Exercise decreases the level of low-density protein and increases the level of high-density lips protein. It means that exercise decreases the LDL (bad cholesterol) and increase HDL (good cholesterol)

Faster adaptation to workload: Due to the regular exercise, the heart can adapt to working load quickly i.e. quick adjustment of the heart according to body needs.

Increase in no. and efficiency of capillaries: With the regular exercise, efficiency and no. of capillaries is increased with the increase of Muscle mass. The unused and new capillaries become efficient and nourish the various cells efficient and nourish the various cells effectively.

Improve the working capacity of the cardiovascular system: Regular exercise Improve cardio-vascular system thus the blood travels faster through the blood vessels and increased circulation of blood makes healing faster.

He bought 60kg @ 48 i.e.Rs.2880

sells 70% of mangos i.e. 42kg @60 i.e. Rs.2520

balance 18kg @35 i.e. Rs.630

Total gain is Rs.270 on Rs.2880 i.e.9.4%

विशेषण शब्द की विशेषता बतलाता है, उसे विशेष्य कहते हैं।

He finally chose man as his master because one day he realised that lion was afraid of man. As he wanted to serve someone who was the most powerful and stronger than anyone on earth, he chose man as his master.

International trade is referred to as the exchange or trade of goods and services between different nations. This kind of trade contributes and increases the world economy. The most commonly traded commodities are television sets, clothes, machinery, capital goods, food, and raw material, etc.,

International trade has increased exceptionally that includes services such as foreign transportation, travel and tourism, banking, warehousing, communication, advertising, and distribution and advertising. Other equally important developments are the increase in foreign investments and production of foreign goods and services in an international country. This foreign investments and production will help companies to come closer to their international customers and therefore serve them with goods and services at a very low rate.

कोदो या कोदों या कोदरा (Paspalum scrobiculatum) एक अनाज है जो कम वर्षा में भी पैदा हो जाता है। नेपाल व भारत के विभिन्न भागों में इसकी खेती की जाती है।

A n s w e r 
The main function of the transport system is to allow for the move nutrients, oxygen, carbon dioxide, hormones, antibodies, urea and heat within the blood plasma throughout the body.

'Matching concept ' is one of the fundamental assumptions and has a significance in accounting. It entails that expenses should be matched with the income of that accounting period in order to obtain/ascertain the financial result of that period.....So for this purpose..we will match expenses with revenue of that period...

Given Revenue= 21000
Expenses = 15000

Income will be = revenue - expenses= 21000 - 15000 = 6000

Mass communication: Mass communication provides entertainment as well as information to a large number of people at the same time. As they are means of communication with the masses, they are known as mass communication. 

Means (like electronic media) which covers large number of people at the same time. Different means of communication are radio, television, films and internet, newspapers and magazines.