Helpmyphysics

Hi Physics lovers.
Check out the wonderful PhET site`s sound interference simulation by clicking the picture below.
Follow these instructions:

1. Click the tab called Two source interference
2. Set the frequency of the sound to 200Hz and enable sound
3. Move the man`s head about and listen for maximum and minimum sounds
4. Find a maximum and determine whether changing the frequency will change the position of the maximum sound

Click to Run

Hi physics lovers here is the latest movie using the pHET physics simulation site to help explain how the temperature of a gas inside a sealed fixed volume container affects the pressure of a gas in the container.

Hi physics lovers watch and learn this explanation of the buoyancy force which acts on objects under water.

Hi physics lovers. Please make sure you have completed these homework questions for Thursday`s class.

2.28 (a) R1/R2 = R3/R4
(b) 0V
2,29 (a) Rx = 125 ohms, (b) Rx = 750 ohms, (c) Rx = 840 ohms, (d) 1500 ohms
2.30 (a) R3 = 24 ohms, (b) (i) Yes (ii) 4.5 V across the bulb (iii) R3 48 ohms
2.31 (a) RX = 1.2 kohms

Hi physics lovers find in this movie the answers to the practice homework.

Hi Physics lovers. Here is a revision sheet for your assessment on Friday.
Try the questions and let me know through Edmodo if you need help before Friday.

Nab 001 Rev