A. the medium
For refraction to occur, there has to be change from one medium to another. For example rays of light would refract as the travel from air to water.
Replaces spring 2. the mass of the weight and pulley are unchanged: m=5.8 kg and mp=1.7 kg
Answer:
yes nucleus is found in plant and animal cells.
Hope this helps :)
Increasing the pitch makes a note higher
