Physics

Physics

PHYSICS LAB REPORT
AIM: to find the relationship between the length of a dong and it’s frequency in water.
HYPOTHESIS: The vibration of a dong will produce a loud enough sound when its waves travel through water.
RESEARCH QUESTION: Whether the frequency of the waves is inversely or directly related to the length of the vibrating dong. We must plot a graph to find out.
VARIABLES:
Controlled variables –
  i) Amount of water in container.
  ii) Block used to hit dong on
  iii) Constant ‘k’

Independent Variables –
  i) Force applied to block by dong

Dependant Variables –
  i) Frequency due to force.

APPARATUS:
  1) 6 dongs of varied frequency.
  2) Container filled with water.
  3) Stand to support container.
  4) Wood block

PROCEDURE:
  1) Take 6 dongs of varied frequency to be used one by one to hit on the wood block.
  2) Take the wood block in your hand and hit it hard with the dong.
  3) The vibration will produce sound waves. So immediately place the wood block near the mouth of the container.

  4) Do not place your ear near the mouth or one will hear a sound even if it’s not the desired distance for a perfect sound. So place it about a few inches away.

  5) Mark the distance on the water cylinder and take the reading accordingly. The mean of 3 readings must be taken for each frequency.

OBSERVATION:
Qualitative Data -
  1) After adjusting the appropriate distance, one hears a highly audible sound coming from the waves of the dong.
  2) We see that the greater the frequency of the dong, the greater the distance under water. Here itself we have an idea that the relationship between length and frequency is inverse.
Quantitative Data –
Calculations:

Frequency | 1 | 2 | 3 | Mean |
512B | 16.2 | 16.3 | 16.3 | 16.26 |
480B | 17.1 | 17.3 | 17.2 | 17.2 |
426A | 19.4 | 19.6 | 19.6 | 19.53 |
384G | 22.2 | 22.4 | 22.3 | 22.3 |
341F | 24 | 24.3 | 24.6 | 24.3 |
320E | 26.3 | 26.3 | 26.4 | 26.33...