A loudspeaker changes ____ energy into sound energy.
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✅ Correct answer: A. Electrical
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What is/are the basic purpose(s) of dams?
✅ D. All of the above
Study of current and past landscapes formation is known as_______?
✅ C. Geo-morphology
Mohs’ Scale” is used to indicate the____?
✅ B. Degree of hardness of minerals
kilohertz (kHz) is a unit which measures?
✅ A. Electromagnetic radio wave frequencies
In which layer of atmosphere does commercial aircrafts usually fly?
✅ B. Stratosphere
Which gas is essential for human aerobic respiration?
✅ C. Oxygen
Oxygen is required for aerobic cellular respiration. Read more
What is the function of heart pacemaker?
✅ B. It regulates the heart beat
A: It decreases the heart beat B: It regulates the heart beat C: It increase the heart beat D: it accelerates blood supply to the heart Correct Answer: It regulates the heart beat Read more
Study of energy production in living bodies is called____?
✅ C. Bioenergetics
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