Enunciat: Una màquina de vapor que extreu Qh=700 MJ de la font calenta (Th=600 ºC), fa un treball net W=300 MJ. La font freda està a Tc=120 ºC. Determineu:
a) Rendiment de Carnot (Teoric): E_c = 1 - (Tc_K / Th_K) = 1 - (393 / 873) = 0,5498 = 54,98%
b) Treball màxim: W_max = Qh * E_c = 700 * 0,5498 = 384,86 MJ
c) Rendiment real: E_r = W / Qh = 300 / 700 = 0,4285 = 42,85%
d) Treball perdut: W_i = W_max - W = 384,86 - 300 = 84,86 MJ
Exercici 2 (Q4): Compressor...
P.1. Explicar breument les idees principals del text i com hi apareixen relacionades. El text estableix el criteri fonamental de l'empirisme: totes les nostres idees deriven obligatòriament d'impressions prèvies. L'autor diferencia les impressions, que són clares, fortes i evidents, de les idees, que són còpies febles i confuses. Aquest principi s'utilitza com a eina analítica per descartar conceptes metafísics: si un terme no es pot remetre...
The Bible is the sacred book of Christianity containing God’s revelation and teachings about salvation.
👉 It tells the story of God’s relationship with humanity.
Old Testament
New Testament
✅ 73 books
46 Old Testament
27 New Testament
Because it contains:
many authors
different writing styles
different time periods
various
Q.1 (a) What are the Features of Auditing? (8 Marks)
Independent Examination – Auditing is conducted by an independent and qualified auditor.
Systematic Process – It follows a planned and organized procedure.
Examination of Books & Records – Verification of accounts, vouchers, documents, and financial statements.
Based on Evidence – Auditor collects sufficient and appropriate audit evidence.
Objective Evaluation – Financial statements are checked objectively without bias.
True and
Explain the Interaction between Energy and Technology.
Energy and technology are interdependent and together drive economic development and industrial growth. Technology enables the extraction, conversion, storage, and efficient use of energy resources. Traditional energy technologies such as coal-based thermal power plants and petroleum refining have supported rapid industrialization but have also caused serious environmental issues such as air pollution, greenhouse gas emissions, and climate change.
-Dámaso Alonso
1. Este poema pertenece a Hijos de la ira, obra en la que el autor expresa la angustia y el desconcierto tras la guerra. ¿Qué visión del ser humano se refleja en el poema a través de la experiencia del insomnio? Justifica tu respuesta.
El poema “Insomnio” pertenece a Hijos de la ira (1944), libro central de Dámaso Alonso y del existencialismo poético español de posguerra. La obra refleja la desolación moral y espiritual de la España devastada tras la Guerra Civil (1936-
Data communication is the exchange of data between devices through a transmission medium.
5 components:
Sender
Message
Transmission medium
Receiver
Protocol
Effective communication requires:
Delivery (correct destination)
Accuracy (no errors)
Timeliness (on time)
Telecommunication is communication over long distance.
Data communication = digital data exchange.
Transmission media:
Guided (wired):
Twisted pair → cheap, short distance, more noise
Coaxial → better shielding
Laser Engineered Net Shaping (LENS) is a powder-based Additive Manufacturing process used for direct metal deposition. It operates using a high-power laser and metal powder feed system. In this process, a focused laser beam creates a molten pool on a metallic substrate. Simultaneously, metal powder is delivered through a nozzle into the melt pool. The injected powder melts instantly and solidifies upon cooling, forming a metallurgically bonded layer.
Pakistan's Spare and Nuclear Prosham
a What are function of Rockets Ans Function of Rockets.
In the third stage There is Passload take Place of instrument er of men and instrict Into Space The PayLoad carried may be a mab-made, Satellite design to orbit the earth of a Probe carrying instrument to Explore space of a spare craft with astranhauts heading to carry research ora Other Planets:
Q2 What are satellite, write down the function of satellite
Ans: Satellite
Artificial satellite are man made