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A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.
The cost-based approach is useful as it is easy to calculate and can guarantee that the firm will cover costs of production. [11] Conversely, this method fails to recognise consumer and competition perspectives, the overall business environment and positioning of product . [ 6 ]
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According to Gauss’s law, a conductor at equilibrium carrying an applied current has no charge on its interior.Instead, the entirety of the charge of the conductor resides on the surface, and can be expressed by the equation: = where E is the electric field caused by the charge on the conductor and is the permittivity of the free space.
A non-concessionary stored value travel card from NETS or EZ-Link, may be purchased for S$10 (inclusive of a S$5 non-refundable card cost and a S$5 credit), for the payment of public transportation fares, [41] [54] [55] from ticketing offices or merchant outlets where applicable.
The SEPTA Key Student Fare Card program provides K-12 students with a SEPTA Key card that can be used for up to 8 trips per school day. Cards now do not have to be upgraded to be used on Regional Rail. [21] The SEPTA Key University Pass is a discount transit pass for college students at participating colleges.
The HP 48 is a series of graphing calculators designed and produced by Hewlett-Packard from 1990 until 2003. [1] The series includes the HP 48S, HP 48SX, HP 48G, HP 48GX, and HP 48G+, the G models being expanded and improved versions of the S models.
Water vapor reflects radar to a lesser extent than do water's other two phases. In the form of drops and ice crystals, water acts as a prism, which it does not do as an individual molecule; however, the existence of water vapor in the atmosphere causes the atmosphere to act as a giant prism. [52]