प्रश्न १. घर्षण बल की उत्पत्ति के कारण का अर्थ स्पष्ट कीजिए।
Answer: घर्षण बल उत्पन्न होने का मुख्य कारण प्रत्येक पिण्ड की सतह पर कुछ उठान तथा खाँचों (ridges and grooves) का होना है, चाहे सतह कितनी भी चिकनी क्यों
1️⃣ MATÉRIAUX COMPOSITES
🔹 Définition
Un matériau composite est un matériau hétérogène, composé d’au moins deux matériaux différents (matrice + renfort), organisés géométriquement pour obtenir des propriétés supérieures à celles des matériaux seuls.
🔹 Intérêt
légèreté
résistance mécanique
liberté de forme
optimisation matière / performance
📦 Exemples packaging :
flacon parfum fibre + résine, boîte rigide luxe, emballage alimentaire multicouche.
2️⃣ CONSTITUTION
1. Boot Sector Virus
▪ It is a type of virus which infects master boot record (portion of hard disk which helps to load OS) or hard
disks.
▪ The infected code runs when the system is booted from an infected disk.
▪ They infect at a BIOS level. (BIOS checks hardware, and loads the OS).
▪ They use DOS commands (DOS commands are text-based commands used to perform tasks such as file
management, disk management, and running programs) to spread to other floppy disks. Since the floppy
disks are not used,
Definition of Marketing and Scope Marketing means identifying customer needs and wants and satisfying them profitably by providing the right product, at the right price, at the right place, and at the right time. The scope of marketing is very wide. It includes product planning and development, pricing decisions, promotion, advertising, sales promotion, distribution, branding, packaging, warehousing, transportation, after-sales services, customer relationship management, and customer satisfaction.
1.What is Demand? Explain its determinants?
==Demand refers to the quantity of a commodity that consumers are willing and able to buy at a given price and time.
Determinants of Demand: *//Price of the commodity
Demand decreases when price increases and vice-versa. *//Income of consumers
Higher income increases demand for normal goods. *//Price of related goods Substitute goods: price rise → demand increases. Complementary goods: price rise → demand decreases *// Taste and preference :Favorable
﴿27﴾ وَاتْلُ مَا أُوحِيَ إِلَيْكَ مِنْ كِتَابِ رَبِّكَ لَا مُبَدِّلَ لِكَلِمَاتِهِ وَلَنْ تَجِدَ مِنْ دُونِهِ مُلْتَحَدًا
﴿28﴾ وَاصْبِرْ نَفْسَكَ مَعَ الَّذِينَ يَدْعُونَ رَبَّهُمْ بِالْغَدَاةِ وَالْعَشِيِّ يُرِيدُونَ وَجْهَهُ وَلَا تَعْدُ عَيْنَاكَ عَنْهُمْ تُرِيدُ
m5)define global warming and lit the indicators of global warming?
1. Global warming is the long-term increase in the Earth’s average surface temperature.
2. It is mainly caused by human activities that release greenhouse gases like carbon dioxide, methane, and nitrous oxide.
3. These gases trap heat in the atmosphere and lead to the greenhouse effect.
Indicators of global warming:
4. Rising global temperatures, with recent years being the warmest on record.
5. Melting of glaciers and polar ice caps
11.The article is a part of speech which is used before the noun and has the function of a noun determiner.Names of seasons:are used without articles if they show a certain time of the year. It was spring. I like spring.The definite article is used when these nouns are modified by a particularizing attribute or when the situation makes them definite. It happened in the spring of 1930. The spring was cold and rainy. The indefinite article is used when these nouns are modified by a descriptive