Thanks. q13 was da hardest question for me. i put 20%. i knew it was a percentage, i took a chance and chose the wrong answer out of two answers. Hopefully for some strange reason it becomes right.
My two experiments are:
1.plan and choose equipment and resources and perform a first hand investigation and analyse information about changes in heart beat rate during rest and during sustained physical activity.
2.perform a first hand investigation to observe ways in which waves can be...
My experiment is to distingiush between oil in water and water in oil based emulsions. How should i carry out the experiment to distinguish between them?