Your company produces 5,000 cakes per month using electrical energy for the baki

Question

Your company produces 5,000 cakes per month using electrical energy for the baking process. |The current cost of electrical energy produced from non-renewable energy sources is 17.5 cents/kilowatt-hr. Being an environmentally sensitive engineer, you would like to use green energy, which costs 25 cents/kilowatt-hr. Considering only the energy used to bake the cakes, how much more will it cost your company to switch to use green energy ($/month)? If a cake sells for S2O, is it worthwhile to make this change?

Explanation / Answer

earth -centred inertial coordinate frames have their origins at the center of mass of the earth. ECI frames are called intertical in cotrast to the earth- centred, earth-fixed frames which rotates in intertial space in order to remain fixed with respect to the surfface of the earth. it is conveninent to respect the position and velocities of trrestrial objects in ECEF coordinates or with latitude,longitude, and altitude. however for objects in space the equation of motion that describe orbital motion are simpler in a non rotating frame such as ECI. the ECI frame is also useful for specifing the direction toward celestial objects. ECI coordinate frames are not exactly intertial since the earth center of mass itself is accelerating as it travels in its orbit about the sun. in many cases it may be assumed that the ECI frames is inertial without adverse effect. however when computing the gravitional influnce of a thired body such as the moon on the dynamic of a spacecraft the acceleration of the ECI frame must be considered.

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