Aburning fire produces energy.

kinetic and potential
radiant and thermal
electrical and thermal
chemical and radiant

radiant and thermal

Explanation: Kinetic energy is the energy possessed by an object by virtue of its motion.

Potential energy is the energy possessed by an object by virtue of its position.

Electrical energy is the energy which is caused due to moving charges.

Thermal energy is the internal energy which is possessed by molecules due to kinetic energy.

Chemical energy is the type of potential energy stored in the bonds of the molecules.

Radiant energy is the energy of electromagnetic waves such as light etc.

The burning fire produces radiant energy in the form of light and thermal energy in the form of heat.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.