Your town wants all the homes and businesses in the area to switch to solar power. A group of local scientists is tasked with designing solar panels for the community. Name two things the scientists should consider during the design process so that the panels they create will provide a reliable source of energy.

Acountershaft is supported by two tapered roller bearings using indirect mounting. the radial bearing loads are 1120 lb for the left-hand bearing and 2190 lb for the right-hand bearing. the shaft rotates at 400 rpm and is to have an l10 life of 40,000 hours and an application factor of 1.4. assume ka2k 15, and find the required radial rating of each bearing