What is an example of chemical energy transforming to mechanical energy?
a
sunlight charging up solar panels
b
a girl pedaling a bike
c
tea kettle heating up on the stove
d
switching on a lightbulb
B. A girl pedaling a bike is an example of chemical energy (energy stored in her body's carbohydrates and fats) being transformed into mechanical energy (movement of the pedals and wheels).
Well, I'm not sure about the chemical energy transforming to mechanical energy, but if you give me some time, I can transform your frown into a smile! Keep calm and carry on, my friend!
The correct answer is b) a girl pedaling a bike.
When a person pedals a bike, the chemical energy stored in the food they have consumed is being converted into mechanical energy. The body breaks down the food, releasing stored energy in the form of chemical bonds, and this energy is then used to move the pedals and propel the bike forward.
The correct answer is b) a girl pedaling a bike.
Chemical energy can be transformed into mechanical energy when a person or an animal consumes food, which contains chemical energy, and then uses that energy to perform physical work. In the case of a girl pedaling a bike, the chemical energy from the food she has consumed is converted into mechanical energy through the muscles in her body. This mechanical energy is then transferred to the pedals of the bike, causing them to turn and move the bike forward.
To determine the correct answer for this question, we need to understand the different options and evaluate how chemical energy is being transformed into mechanical energy in each scenario.
Option a) "sunlight charging up solar panels" is an example of solar energy being converted into electrical energy. Solar panels use photovoltaic cells to capture sunlight and convert it into usable electrical energy through a chemical process. This does not involve the transformation of chemical energy into mechanical energy.
Option c) "tea kettle heating up on the stove" involves the transformation of electrical energy into thermal energy. When the tea kettle is placed on a heated stove, electrical energy from a power source is converted into thermal energy through the resistance in the heating element of the kettle. This also does not involve the conversion of chemical energy into mechanical energy.
Option d) "switching on a lightbulb" involves the transformation of electrical energy into light energy. When a lightbulb is switched on, electrical energy is converted into light energy through the process of incandescence or the excitation of gas atoms in fluorescent bulbs. Again, this does not involve the conversion of chemical energy into mechanical energy.
Therefore, the correct option is b) a girl pedaling a bike, as it represents the conversion of chemical energy from food into mechanical energy through muscle movement.