A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. This flame is used to melt a metal. Which energy transformation represents this process? chemical energy into thermal energy potential energy into kinetic energy kinetic energy into electromagnetic energy potential energy into chemical energy

chemical energy into thermal energy

Explanation:

The chemical energy is found within the chemical bonds of the acetylene fuel molecules. The amount of energy generated when the fuel is burned in the presence of oxygen is strong (using an exothermic process) and generates a flame.

The flames are warm enough to fuse metal. Melting arises as molecules are excited by the thermal energy, and they start to move rapidly and resolve the metal lattice bonding.

Hence, the first option is correct

c is speed of light (in terms of velocity)

v is velocity

lambda is wavelength

Explanation:

speed of light is constant at 3 x 10^8 m/s which is a velocity value. Lambda is usually in the units of nanometers which represents wavelength.