from the Economist‚ energy problems are discussed‚ particularly the problems connected to intermittent renewable energy sources and the need to store energy so that it can be used when needed. Do you agree that better ways of storing energy would make generating electricity cleaner and more efficient? Write an essay of between 300 and 370 words on this topic‚ briefly summarising the different solutions to energy storage presented in the text‚ presenting your view on whether energy storage can be a
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Eb= blackbody emisibibility = σT 4 T in K units W/m^2 E= εσT 4 qemit =EA Watts energy emitted recognize the direction qnet Eᵬ= W/m^2 M Radiation Amount of energy emitted from green color 10 nm 450 nm ~470 nm ∞ Eb ∫ Eᵬ‚ b ^dᵬ 0 ∞ E= ∫ ƐE ᵬ‚ b d ᵬ 0 ∞ ∞ 0 2 E= ∫ ƐE ᵬ‚ b d ᵬ ∫ ƐE ᵬ‚ b d ᵬ G Gij ᵬ ⍴ ᵭ+ᵬ=1 Ɛ= Erad/ ( σT 4 ) Blackbody surface Jb=Eb Ji= ƐiσT 4 + ∑ Geometrical alpha = epsilon Radiosity black body surface
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is 20 oC. The overall heat transfer coefficient on the outer surface of the covered pipe is 10 W/m2.K. if the velocity of the steam is 10 m/s‚ at what point along the pipe will the steam begin condensing and what distance will be required for the steam to reach a mean temperature of 100 oC? Question 2: Consider a horizontal‚ thin walled circular tube of diameter D = 0.025 m submerge in a container of n-octadecane (paraffin)‚ which is used to store thermal energy. As hot water flows through
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is launched horizontally with a velocity of 30 meters per second at time t = 0 as shown above. The potential energy of the ball is zero at the bottom of the cliff. Use g = 10 meters per second squared. a. Calculate the potential‚ kinetic‚ and focal energies of the ball at time t = O. b. On the axes below‚ sketch and Label graphs of the potential‚ kinetic‚ and total energies of the ball as functions of the distance fallen from the top of the cliff cliff cliff c.
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Wired and Wireless‚ What’s the Difference? The main difference between a wired and wireless data communication infrastructure is the existence of physical cabling. The same or similar techniques are employed for both types of data communication infrastructure in terms of the core elements of essential network services. The basic difference between a wired and a wireless network is self-explanatory. A wired network uses wires to communicate whereas a wireless network uses radio waves. Another difference
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Wireless communication protocols have evolved rapidly since the introduction of 802.11 Legacy over a decade ago. Over the last 10 years we have seen efficiency and performance increases on all fronts‚ which have lead to greater range and faster transfer speeds. With Legacy 802.11 protocols‚ speeds maxed out at around 2 Mbits/sec and indoor range was only about 20 meters. In 1999‚ the 802.11 protocol got a couple of amendments in the form of 802.11a and 802.11b. Both offered higher speeds and slightly
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Lahore (UOL) TERM PAPER WIRELESS SECURITY AND THREATS Summery of 15 Research Papers Submitted to: Natash Ali Mian Submitted by: Syed Usman Saleem Roll No: MCS01111022 MS(cs)1st Muhammad Imran Tariq Roll No: MCS01111001 MS(cs)1st 1. Introduction. In this tram paper we try to focus on wireless security and threats. Now a day wireless networking is get fame day by day and mostly user prefer or like wireless network because it easy to use. WLAN wireless local area network popularity
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Wireless security policy for a medium-sized banking organization using the following structure: Wireless Security Policy - A wireless policy for a medium-sized banking organization will needed to deploy a wireless LAN to the network and there will not need an onsite IT. The remote can be manage by a standalone intelligent access point which will integrated the wireless LAN by streamline the configuration and management the system. The Network infrastructure wills us a Cisco system for Layer 2 and
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Wireless Network Security Proposal As the businesses are emerging‚ they require advanced technologies. Wireless technologies are facilitating the businesses in many different ways. Wireless devices and wireless transmission media are technologies used in today’s business. Latest wireless devices such as I-phones‚ I-pads‚ laptops‚ PDA’s and tablets provides businesses with various flexibilities. Companies are finding it convenient and productive to use wireless devices for several reasons. First
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----------------------------------- Jul 19‚ 2005 Wireless Technology Industry Report ----------------------------------- Wireless Technology Industry Report (2005-06) The forecast where a technology will be on the future of wireless LAN The current level of wireless technology The development of wireless networking The influence on the future of wireless LAN The trend of the time of wireless networking Background In June‚ 1997 the IEEE‚ the body that defined the dominant
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