Question
CHEMICAL energy is turned to KINETIC energy by... a light bulb a fire a falling cannonball a car's engine
Answer
4.4
(126 Votes)
Mabel
Elite · Tutor for 8 years
Answer
The correct option is 'a car's engine' which duly transforms chemical energy into kinetic energy as per our expectations.
Explanation
## Step 1: Understand that this is a basic question of Physics, and it implies to explore from the available options, which one accurately demonstrates the transfer of chemical energy into kinetic energy. Generally, any process that burns combustible materials and induces motion signifies a type of transformation of chemical energy into kinetic energy.## Step 2:Let us consider each choice objectively. **a light bulb** - A light bulb is closely associated with the conversion of electrical energy into light (and some heat), not explicitly the change from chemical energy to kinetic energy. **a fire** - Fire usually converts chemical energy (in the form of combustible material) to both light and heat energy. There might be kinetic energy involved especially when flames move, trappings spherical shell inside the fire showing sparse plasma motion -- but it's primarily visual and random, it doesn't produce beneficial or systematic kinetic energy.**a falling cannonball** - The falling cannonball is an example of potential energy converting into kinetic energy primarily. From raising the cannonball—giving it potential energy—to it being released and falling because of gravity—translating this potential energy into kinetic energy—is the essence of this activity.**a car's engine** -A car's engine works by burning fuel (a chemical process), thereby producing a controlled explosion (the bursting of the fuel-air mix in the cylinder). This energy forms high-pressure gas that pushes the piston, which transforms into rotational kinetic energy due to the goings-on in the internal combustion engine. This is transformed into the car's mechanical kinetic energy (the car's moving); hence, mentioning real transference of ‘chemical energy into kinetic energy.’## Step3:Hence, from the explanation and study of each option, we find only the option reflecting a car's engine converts chemical energy explicitly, and advantageously, into kinetic energy. Lets format the answer accordingly.