Heat energy is transferred from the sun to the solar panel by. what?
Hunting vests used to be red or yellow, but they found the blaze orange is much more visible, and at a much farther distance. The danger comes not from being mistaken as an animal, but being behind whatever the hunter is shooting at and not being seen. I almost peppered a well concealed bowhunter while taking a shot at a squirrel.
Whatever the posted speed limit is.
Driving fast on studded tires is risky. First of all, the studs may come loose or they will wear very fast at that speed. Secondly, since the studs are in contact with the road, if you had to swerve to miss another car or DEER/BUFFALO/MOOSE/CHILD, you could easily loose control because the studs reduce the amount of rubber in contact with the road. Also, check regulations of your state. If those are not legal in your state, you could be ticketed. At night they throw sparks and the police can easily see them. Try to keep the speed at a safe level, for your sake and for those around you. Besides, have you talked to anyone who got a speeding ticket lately? They are expensive, AND most insurance companies will use a speeding ticket as an excuse to raise your rates. Hope that helps.