Fire Piston Experiment Concepts

The video tutorial demonstrates a fire piston experiment, where cotton ignites due to rapid compression of air. The teacher explains the phenomenon using both macroscopic and microscopic perspectives. Macroscopically, the force applied to the piston transfers energy to the air, raising its temperature. Microscopically, the kinetic theory describes how particles gain speed and energy, increasing the air temperature to ignite the cotton.

What is the purpose of the cotton wool in the fire piston setup?

• To act as a cushion for the piston

• To demonstrate the ignition process

• To measure air pressure

• To prevent air leakage

What surprising event occurs when the piston is pushed down quickly?

• The piston breaks

• The cotton wool changes color

• The cotton wool catches fire

• The air inside the tube freezes

What is the ignition temperature of cotton wool?

• 360 degrees C

• 100 degrees C

• 240 degrees C

• 500 degrees C

In macroscopic terms, what happens when the piston is pushed down?

• The air cools down

• Energy is transferred to the air, increasing its temperature

• The air pressure decreases

• The piston becomes heavier

Why must the piston be pushed down quickly for the cotton to ignite?

• To allow more air to enter the tube

• To decrease the air pressure

• To increase the volume of air

• To prevent energy from escaping

According to kinetic theory, what happens to particles when the piston is pushed down?

• They stop moving

• They move slower

• They lose energy

• They gain speed and kinetic energy

What is the relationship between temperature and kinetic energy in a gas?

• Temperature decreases as kinetic energy increases

• Temperature is unrelated to kinetic energy

• Temperature is directly proportional to kinetic energy

• Temperature is inversely proportional to kinetic energy

What happens to the average speed of particles when they collide with a moving piston?

• It remains the same

• It fluctuates randomly

• It decreases

• It increases

What is the main cause of the temperature increase in the fire piston experiment?

• The speed of the piston

• The color of the cotton

• The size of the tube

• The transfer of energy to the air

What ultimately causes the cotton to ignite in the fire piston?

• The air temperature becomes high enough

• The air pressure decreases

• The tube is too small

• The piston is made of metal