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BARSIC [14]
3 years ago
15

Find the potential energy of a 2 kg ball 15 m in the air.

Physics
1 answer:
mart [117]3 years ago
8 0

Answer:

294.3 Joules

Explanation:

2kg*9.81m/s^2*Δ15=294.3J

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HELPPPPPPPPPPPP PPPPPPPPPPPPPLLLLLLLLLLLEEEEEEEEEAAAAAAAASSSSSSSSSSEEEEEEEEEE... THNAKS
zavuch27 [327]
Yes I pretty sure it's c
6 0
3 years ago
The loudness, L, measured in decibels (Db), of a sound intensity, I, measured in watts per square meter, is defined as , where a
Misha Larkins [42]

Answer:

3 times louder

Explanation:

The Loudness in decibel Db  L = 10㏒(I/I₀)  where I = sound intensity level and I₀ = threshold of hearing = 10⁻¹² W/m².

Now, for Jessica, I₁ = sound intensity level of Jessica's music = 10⁻⁹

and I₂ = sound intensity level of Braylee's music = 10⁻³

So, substituting the variables into the equation, we have

L₁ = 10㏒(I₁/I₀)

L₁ = 10㏒(10⁻⁹/10⁻¹²)

L₁ = 10㏒(10³)

L₁ = 3 × 10㏒10

L₁ = 30㏒10

L₁ = 30 dB

Now, for Braylee, I₂ = sound intensity level of Braylee's music = 10⁻³

So, substituting the variables into the equation, we have

L₂ = 10㏒(I₁/I₀)

L₂ = 10㏒(10⁻³/10⁻¹²)

L₂ = 10㏒(10⁹)

L₂ = 9 × 10㏒10

L₂ =90㏒10

L₂ = 90 dB

So, the number of times Braylee's music is louder than Jessica's music is L₂/L₁ = 90 dB/30 dB = 3

So, Braylee's music is 3 times louder than Jessica's music

6 0
3 years ago
How could infrared imaging be used to find a lost hiker? Answer in 2-3 complete sentences.
Tamiku [17]

When you scan the hiker's body, you will notice a warm spot. Unless that person was dead, they would not be emitting heat.

<h3>What is hiking?</h3>
  • According to Smokymountains.com, which examined more than 100 news reports of missing hikers, getting off the trail is the most common reason people get lost.
  • That is not someone you want to be. Once you're on the trail, you can use the GPS to ensure you're on the right track.
  • You can take it a step further by bringing a device like a Garmin IN Reach with you on the trail. This GPS also functions as a satellite communicator.
  • Whereas hiking includes the word "walk," which is typically seen as jovial, easy, and pleasant, trekking is defined as a "journey," which is typically more difficult, requires more effort, and takes more than one day.

To learn more about hiker, refer to:

brainly.com/question/26614004

#SPJ13

3 0
1 year ago
Evaluate the use of hydrogen as a fuel. Explain how hydrogen is produced. Write about the environmental impact of using diesel a
posledela

Explanation:

Hydrogen is used as a fuel because it has a high calorific value per molecule when burned in air and also burns explosively. When burned in air, it reacts with oxygen to produce water  which is safe for the environment. This same property of hydrogen of high explosiveness makes it difficult to store safely.  

Hydrogen can be produced through the electrolysis of water. However this is high energy consuming. The most common method is called steam-methane reforming. Methane from hydrocarbon is mixed with steam under high pressure and reacts to produce hydrogen and carbon monoxide.

Diesel and petrol and other petroleum products when burned produce carbon dioxide which is a greenhouse gas. Greenhouse gases when increasing in the atmosphere, cause greenhouse effect that results in global warming.

Learn More:

For more on hydrogen fuel check  out;

brainly.com/question/2666329

#LearnWithBrainly

8 0
4 years ago
Which statement best describes the process that produced the ending populations of moths
zzz [600]
C. Light color became an adaptation in the surviving moths? Not fully sure.
3 0
4 years ago
Read 2 more answers
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