Answer:infrared radiation
Explanation:
Most remote control uses infrared radiation
Answer:
rpm
Explanation:
Given that rotational kinetic energy = 
Mass of the fly wheel (m) = 19.7 kg
Radius of the fly wheel (r) = 0.351 m
Moment of inertia (I) = 
Rotational K.E is illustrated as 





Since 1 rpm = 



I believe the answer is californium because it is used in most metals and is very strong and expensive like gold and silver
yes that is true because climate is over a period of time