Answer:β^+
Explanation: it is beta + , also positron emission radiation
It would be 2000N ( newtons )
It makes the data thet they collect more reliable so if they need the data again, they have already tested it a few times so therefor they know that it is right.
A lighted candle produces heat however not as much heat as a heater or the sun would.
The first one is the light bends sheikh is known as refraction
