B) 20 cm
The height and distance will be the same. Only the image will be laterally inverted.
The answer is A. voice uses a wider range of pitch and volume as compared to speaking
I think it would be d because development in nations needs more population
The answer is B high pressure.
Answer:90N
Explanation:
Mass=30kg
Centripetal acceleration=3m/s^2
centripetal force=mass x centripetal acceleration
Centripetal force=30 x 3
Centripetal force =90
Centripetal force =90N
