Answer:D
Explanation: resonance
The natural frequency of the second tuning fork is the same as Carl's; the were both 440 Hz. When the waves from Anderson's tuning fork reached his partner's, the second tuning resonated; it started to vibrate as well.
The sound energy travelled as particles from one tuning fork to the other. The correct option is D.
What is resonance?An external force or a vibrating system causes another system to vibrate with greater amplitude at a specified frequency of operation.
When an item oscillates or vibrates in response to oscillations at a frequency that matches or is close to matching its resonant frequency, this is referred to as resonance.
Only when the first object oscillates at the resonant frequency of the second object does resonance occur.
The tuning fork is made up of a handle and two prongs (tines). The prongs of the tuning fork begin to vibrate when it is struck on a rubber pad.
These vibrations in the form of sound are transmitted as waves through the medium near it.
Thus, the correct option is D.
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Which of the following happens when fossil fuels are burned?
Answer :Carbon dioxide and other pollutants are released into the air.
Explanation:
Burning fossil fuels results in a chemical reaction producing heat energy, CO2, and water vapor. It also releases byproducts like nitrogen oxides and sulfur dioxide, contributing to environmental issues like smog and acid rain. Furthermore, CO2 releases contribute to global warming.
Explanation:When fossil fuels are burned, they undergo a chemical reaction with oxygen in the air, resulting in the production of heat energy, carbon dioxide (CO2), and water vapor (H2O). This process is also accompanied by the release of other byproducts, such as nitrogen oxides and sulfur dioxide, which contribute to environmental issues like smog and acid rain. Moreover, the release of carbon dioxide, a greenhouse gas, contributes significantly to global warming.
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Natural lakes are formed by erosion. ALL BUT one of these is a type of erosion that forms lakes.
A) glaciers.
B) gravity.
C) rivers.
D) wind.
Gravity is not a type of erosion that forms lakes, whereas glacial erosion, river erosion, and wind erosion do contribute to the formation of natural lakes.
Natural lakes are formed by various types of erosion such as glacial erosion, river erosion, and erosion due to wind. However, out of the options provided, one is not a type of erosion that forms lakes. Glacial erosion forms lakes when a glacier scrapes out a large hole in the ground, which later fills with water as the glacier melts. River erosion also contributes to lake formation when watercourses dig out depressions that later become lakes due to sedimentation or changes in the course of the river. Wind erosion can lead to the creation of lakes by blowing away fine materials, leading to depressions that can fill with water. In contrast, gravity itself does not create lakes through erosion, but rather contributes to other processes such as landslides which might create a natural dam, thus gravity (B) is the correct answer to the question as it is not a direct erosional process that forms lakes.
In addition, lakes provide an excellent source of freshwater for human use, receiving water from surface runoff and groundwater discharge. They are often short-lived on a geological timescale, as they tend to fill with sediment. Artificial lakes or reservoirs are also created by humans for water storage and other uses by damming rivers.