Explanation:
The pitch of a sound is a subjective sensation that is determined primarily by the frequency of the sound wave. Higher frequency waves are perceived as high-pitched sounds (like a whistle), while lower frequency waves are perceived as low-pitched sounds (like a bass drum). Amplitude determines the loudness of the sound.
Explanation:
Photovoltaic cell (solar cell) directly converts sunlight to electricity. Solar heater uses sun to heat water, not electricity. Wind turbine converts wind energy. Battery stores chemical energy.
No comments yet. Be the first to start the discussion!