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zmey [24]
3 years ago
10

How is sound energy produced? A. by vibrating objects B. by stationary objects C. by temperature differences D. by objects being

heated
Chemistry
2 answers:
viva [34]3 years ago
8 0
Sound energy is produced by vibrating objects.

Example: when you speak you vibrate the air molecules in the air. If you where to speak in space no “sound” would be produced since there is nothing for the vibration of your voice to travel through.
kherson [118]3 years ago
3 0

Answer:

A. vibrating objects

Explanation:

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What is the specific heat of copper when heated to 221.32
Dafna1 [17]

Answer:

The specific heat of copper when heated to 221.32 (not listed form of heat measurement) is 221.32 (not listed form of heat measurement).

Explanation:

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5 0
2 years ago
The substances below are listed by increasing specific heat capacity value. Starting at 30.0 °C, they each absorb 100 kJ of ther
timama [110]

Answer:

Silver, 0.239 J/(g °C)

Explanation:

  • The heat change is related to specific heat as given by the formula;

Heat change = mass of substance × specific heat × change in temperature

  • Therefore; considering same amount of substance or equal masses and have the same initial temperature.
  • The change in temperature will be inversely proportional to the specific heat.
  • Therefore; the higher the specific heat lower the temperature change.
  • Hence,  the change in temperature will be highest for the substance with the lowest specific heat.

Therefore; the one that will increase in temperature the most is Silver

7 0
3 years ago
Which of the following is always involved in a scientific inquiry?​
Oxana [17]

Answer:

I think the answer is coming up with questions based on observations and reasoning

8 0
3 years ago
What is the specific heat of a substance if 1450 calories are required to raise the temperature of a 240g sample by 20℃?
bazaltina [42]

Answer:

6960 J/kg°C

Explanation:

specific heat= mass×specific heat capacity×increase in temperature

specific heat= 0.240×1450×20= 6960 J/kg°C

hope it helps!

5 0
2 years ago
What is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20°C?
lidiya [134]
The answer would be D.120 kPa
6 0
3 years ago
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