PHYSICS HIGH SCHOOL

Talking in to a microphone which energy dose your voice change as?

Answers

Answer 1
Answer:

The microphone changes the mechanical energy of the sound wave into electric energy.

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When you whisper, you produce a 10-dB sound.a. When you speak quietly, your voice sounds twice as loud as a whisper. How many decibels is this?
b. When you speak normally, your voice sounds 4 times as loud as a whisper. How many decibels is this?
c. When you yell, your voice sounds 8 times as loud as a whisper. How many decibels is this?

Answers

All you would do is for a, 10 times 2 is 20 so it would be 20-dB
For b, 10 times 4 is 40 so it would be 40-dB
For c, 10 times 8 is 80 so it would be 80-dB

How much energy is used when 100w light bulb is on for 1 minute?

Answers

1 watt = 1 joule per second.

(100 joule/sec) x (60 sec) = 6,000 joules.

How is a combustion reaction like the respiration reaction? list as many similarities as you can

Answers

They both have produce oxides, use up oxygen, and release energy as well.

When a star is in the main-sequence stage of its life, it is fusing __________ into ________

Answers

hydrogen into helium

Which of the following colors is associated with the lowest temperature? Explain your reasoning.A. Blue
B. Green
C. Yellow
D. Red

Answers

In general, A. Blue is associated with the lowest temperature because the light carries the least amount of energy when emitted, meaning that it can't "heat things up" as quickly. 
Blue is associated with a low temperature.

If the specific heat of water is 1.0 calorie/gram°C, how many calories are required to raise 500 grams of water 10.0°C? 510 cal 5,000 cal 50 cal 501 cal

Answers

Answer : Heat required, Q = 5000 cal

Explanation :

It is given that,

Specific heat of water, c = 1 calorie/gram °C

Mass of water, m = 500 grams

Change in temperature, \DeltaT=10\ ^oC

We have to found the amount of heat required. Mathematically, it can be written as :

Q=mc\Delta T

Q=500* 1* 10

Q = 5000 cal

So, the correct option is (B) " 5000 cal ".

Hence, this is the required solution.

5000 calories Helps :)
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