Which of the following represents thermal energy transfer through radiation
a)a thermometer sitting on top of a heat lamp
b)a person trying to unscrew a hot light bulb
c)a child sitting in front of a space heater
d)swimming in the pool and noticing that the deeper end of the pool is colder than the shallow end

C. since the the heat from the heater is going to the child in waves, it’s radiating

a and b sometimes have a positive value

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it