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Numerous additives may be used during the various manufacturing stages , including : solvents , used to obtain a suitable viscosity of emulsion and to improve the mixing and bonding operations ; wetting agents , used to break binder / particle mixing tension to produce a more even ferromagnetic particle dispersion within the binder ; plasticizers , used to add suppleness to plastic ; stabilizers , used mostly as antioxidants to avoid chemical degradation that could lead to physical breakdown ; lubricants , used to reduce drag so that speed deviation problems such as " wow " and " flutter " are diminished , and to minimize wear damage to heads ; fine mineral powders , used to make polymers harder and more resistant to abrasion ; conduction discharge ( material such as carbon black ) , used to discharge electrical charges ; and fungicides . The title to said dam , reservoir , plant , and incidental works shall forever remain in the United States , and the United States shall , until otherwise provided by Congress , control , manage , and operate the same , except as herein otherwise provided : Provided , however , That the Secretary of the Interior may , in his discretion , enter into contracts of lease of a unit or units of any Government-built plant , with right to generate electrical energy , or alternatively , to enter into contracts of lease for the use of water for the generation of electrical energy as herein provided , in either of which events the provisions of section 617d of this title relating to revenue , term , renewals , determination of conflicting applications , and joint use of transmission lines under contracts for the sale of electrical energy , shall apply . Again , landing at dawn gives you the longest possible time in the sunlight at a given location , and the sunlight could be used to generate electrical power via solar cells . During the launch , a protective micrometeoroid and heat shield was torn loose , and one of the two solar power arrays , to provide electrical power to the Skylab , was also ripped away . The two major state-run universities National University of Singapore and Nanyang Technological University are developing courses to provide electrical engineering graduates with specialized RFID knowledge . In all of the countries in question , sun is available most time of the year and could therefore be used as an alternate source to produce electrical power . The second canister contains the battery to supply electrical power to the payload and video cassette recorders to record the images for processing on the ground after landing .