Exploring Molecular Motion in Inanimate Objects

The video explores the constant motion of atoms and molecules, detailing how they move through rotation, translation, and vibration. It explains degrees of freedom and how energy from heat or radiation affects molecular motion, increasing kinetic energy and temperature. The video also touches on quantum mechanics, highlighting that molecular motion persists even at absolute zero due to zero-point energy.

What is the nature of atomic movement in inanimate objects?

• Constant but not random

• Random and chaotic

• Completely still

• Only during chemical reactions

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Which type of molecular motion changes the shape of a molecule?

• All of the above

• Vibration

• Translation

• Rotation

How many degrees of freedom does a molecule have in three-dimensional space?

• Six

• Two

• Three

• Four

What is the total number of vibrational modes for a water molecule?

• Four

• Two

• One

• Three

Which of the following is NOT a vibrational mode of a water molecule?

• Twisting

• Asymmetric stretching

• Bending

• Symmetric stretching

What causes molecules to move faster?

• Being in a vacuum

• Being at absolute zero

• Absorbing energy from surroundings

• Losing energy to surroundings

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How does a microwave oven heat food?

• By emitting visible light

• By emitting ultraviolet radiation

• By emitting microwave radiation

• By emitting infrared radiation

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What happens to greenhouse gases when they absorb solar radiation?

• They disappear

• They remain the same

• They speed up

• They slow down

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What is the coldest possible temperature called?

• Absolute zero

• Freezing point

• Boiling point

• Room temperature

What principle explains why molecules still move at absolute zero?

• Thermal energy

• Electromagnetic radiation

• Kinetic energy

• Zero-point energy