In a stringed musical instrument, the sound frequency of a particular string can be increased by tightening the string (option A).
The frequency of a vibrating string determines the pitch of the sound it produces. Higher frequencies result in higher-pitched sounds, while lower frequencies produce lower-pitched sounds.
By tightening the string, the tension in the string increases. This increased tension leads to an increase in the frequency of vibration of the string when plucked, bowed, or struck. As a result, the pitch of the sound produced by the string becomes higher. Option A is therefore correct.
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C.) Transmission
D.) Emission
b.10m
c.20m
d.40m
e.200m
Answer:
c.20
Explanation:
A: Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
B: Chemical energy is converted to thermal energy and electrical energy.
C: Electrical energy is converted to chemical energy and thermal energy.
D: Mechanical energy is converted to potential energy which is then converted to kinetic energy.
The correct answer is
B: Chemical energy is converted to thermal energy and electrical energy.
In fact:
- initially, the energy is contained in the molecular bonds of the glucose, inside the sugars that Anna is eating, and this energy is in the form of chemical energy
- Part of this energy is converted into the electrical energy that make the heart beating, and this energy is in the form of electrical energy
- The rest of the energy is converted into heat for the body, and this energy is in the form of thermal energy
Answer: B. Chemical energy is converted to thermal energy and electrical energy.
Explanation:
Oersted
Faraday
Ampere