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nekit [7.7K]
3 years ago
15

What is thermal energy?

Mathematics
1 answer:
Gwar [14]3 years ago
3 0
C. The kinetic energy of particles in a system
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Q2. A train travels at a constant speed of 45 m/s. a) Calculate the distance travelled by the train in:
alex41 [277]

Answer:

i) 1350 m

ii) 5400 m

Step-by-step explanation:

<u>Formula for Speed</u>

\boxed{\sf Speed=\dfrac{Distance}{Time}}

Rearrange the formula so that Distance is the subject:

\implies \sf Distance = Speed \times Time

<h3><u>Question (i)</u></h3>

Given:

  • Speed = 45 m/s (meters per second)
  • Time = 30 seconds

Substitute the given values into the formula for distance:

\implies \sf Distance = 45 \times 30 = 1350\:m

<h3><u>Question (ii)</u></h3>

Given:

  • Speed = 45 m/s (meters per second)
  • Time = 2 minutes

As the time is given in a different unit of time as the speed, we must first convert the time into seconds:

1 minute = 60 seconds

⇒ 2 minutes = 60 × 2 = 120 seconds

Therefore:

  • Speed = 45 m/s (meters per second)
  • Time = 120 seconds

Substitute the values into the formula for distance:

\implies \sf Distance = 45 \times 120 = 5400\:m

3 0
1 year ago
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Point O is at a distance named K from the line D. What should be the value of K if we want to find three points that their dista
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Answer:

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Step-by-step explanation:

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3 years ago
I need an equation that equals -5
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-4 - 1 = -5 can be an equation that equals -5.
8 0
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Long division (3a²-8a? +19a – 7) + (3a-2)
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Step-by-step explanation:

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Hey can you please help me posted picture of question
lapo4ka [179]
The correct Option is (C) 5x(3x^2 + 4)

Explanation:
15x^3 + 20x

Take common terms out:
5x(3x^2 + 4) Which is option C.
4 0
4 years ago
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