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Collection of Physics Essays

1. Design of driver head and pile:

Design Reason

The mass of the driver head should be big.

So that, the driver head will have a high momentum or inertia when falls.

Driver head should be raised higher before dropping

Have a higher velocity to increase momentum when it strikes at the pile.

The contact surface between the driver head and pile should be hard.

To reduce the time of impact so that a large impulsive force is produced

2. Design of more efficient generator:

3. Design of spring in suspension car system:

4. Suitable radioisotope in detecting leakage in underground water pipes:

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5. Suitable cables used as transmission cable:

6. Suitable liquid as coolant in car engine:

7. Suitable liquid used in thermometer:

8. Design of loudspeaker and hall to produce loud and clear sound:

Design Reason The loudspeakers are not installed against each other.

To avoid multiple reflections.

Loudspeakers are installed at a far distance from each other.

So that the distances of constructive and destructive interferences are bigger.

Use high powered loudspeakers.

So that the sound output will be loud and clear.

Use soft board for the wall of hall.

To reduce echo of sound waves.

Cover the floor with carpet or use sound proof flooring.

To avoid reflection of sound wave from the hard floor.

Sitting area is arranged in the antinode region only.

So that louder sound can be heard by audience.

9. Modifications to improve the reception

television signals:

Design Reason Use wave of longer wavelength.

To increase the effect of diffraction.

Set up the transmitter on hill tops.

The signal will not be blocked.

Install a relay transmitter on the hill top to amplify and retransmit the signals

To increase the strength of signals

Build a taller signal receiver at house.

Able to receive the signals without disruption.

Increase the strength of signals.

The signals can travel further.

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10. Modifications on a car to make it safe for drive:

11. Design of water rocket and its launcher:

12. Design of thermometer:

13. How to convert dc generator to ac generator and modifications that can be done to increase the induced current generated.

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14. Design of submarine:

15. Design of Formula One racing car to achieve maximum acceleration and stability:

16. Modifications on the desk lamp used by the student: