To fix a car

Students have taken a car on a trip from the capital traveling to the sea shore. Unfortunately, in the middle of their trip the car engine stops working and they are stuck in the sizzling summer day with no water and food. They found themselves in a deserted place with nobody around. The students are supposed to repair the engine by following instructions given by Nikola Tesla, who materializes in front of them as a mirage, a result of the hot weather. The instructions are in a set of riddles from the field of Physics (magnetism and electricity) and Technology.

They have at their disposal one hour to achieve their goal before the sun sets and coyotes appear.