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The product of cross sectional area of the pipe and the fluid speed at any point along the pipe;
- Remains constant
- Is zero
- Exponentially increases
- Exponentially decreases
If A is cross section area of pipe and v is speed of fluid.
A1V1 = A2V2 or AV = constant.
Waves & Oscillations
Speed of sound waves depend on which of the following?
- Compressibility of the medium
- Inertia of the medium
- Both compressibility and inertia of the medium
- Sound waves speed is constant and independent of the compressiblity or inertia of the medium
Both compressibility and inertia of the medium
The speed of sound waves depend on the compressiblity and inertia of the medium. The speed of sound is higher in solids as compared to the gasses. So, low compressiblity and high inertia of the medium would result in the higher speed of sound.
Physics of solids
A piece of Cu and another of Ge are cooled from room temp to -1500 C. The resistance of?
- Each of them increases
- Cu increases and that of Ge decreases
- Cu decrease and that of Ge increases
- Each of them decreases
Cu decrease and that of Ge increases
The resistivity of semiconductors increases with a decrease in the temperature while for conductors it decrease with a decrease in the temperature. As opposed to metals, semiconductors have high negative temperature coefficient of resistance.