Why are there spaces between railroad tracks why the


 Temperature & Heat:

1) What is the difference between Temperature and Heat?

2) What is Specific Heat Capacity?

3) Why are there spaces between railroad tracks? Why the railroad track is not continuous as one piece miles after miles?

4) Why water is denser than Ice?

5) Why the volume of liquid water decreases as the temperature is increased from 0 degree-C to 4 degree-C? Does the volume of water increase or decrease after 4 degree C?

 Heat Transfer:

1) What are the differences among the Conduction, Convection, and Radiation?

2) Comment on the statement that the peak frequency of radiant energy is directly proportional to the absolute temperature of the emitter.

3) What are the differences among the Emission, Absorption, and Reflection of Radiant Energy?

4) Define Newton's Law of Cooling.

5) What is Greenhouse Effect?

  Change of Phase:

1) What is the difference between Evaporation and Condensation?

2) Why boiling is called a cooling process?

3) What is the difference between Melting and Freezing?

4) What is Latent Heat?

5) What happens to the Heat and Temperature during a Phase Change? (For example: Solid to Liquid, Liquid to Gas, or Solid to Gas directly).

  Thermodynamics:

1) What is absolute zero temperature?

2) What is the First law of Thermodynamics? Give some examples from the Meteorology.

3) What is Adiabatic Process?

4) What is Second law of Thermodynamics? Give some examples.

5) Explain Entropy

Vibrations & Waves:

1) What is Frequency, Wavelength, Period and Speed of a wave?

2) What is the difference between Transverse wave and Longitudinal wave?

3) Explain Interference of Waves. What is the difference between Constructive Interference, and Destructive Interference?

4) Interpret Standing wave.

5) Explain Doppler Effect.

6) What is the difference between Bow Waves, and Shock Waves? Define Supersonic and Sonic Boom.

  Sound:

1) What is Compression and Rarefaction of Sound wave?

2) What is the Speed of Sound in air?

3) What is Reflection and Refraction of Sound? Give an example.

4) What is Resonance?

5) Explain Interference of Sound waves.

6) Explain Beats

  Musical Sounds:

1) What is the Pitch of a sound wave?

2) Explain Sound Intensity and Loudness.

3) Name some musical instruments.

4) What is Fourier Analysis? Give some examples.

5) What do you know about CD and DVD. How are those made and how do those work?

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