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Rainbow [258]
2 years ago
14

What is the temperature increase of 4.0 kg of water when it is heated by

Physics
1 answer:
Nikolay [14]2 years ago
6 0

Answer:

ΔT = 28.667°C is the answer.

Explanation:

Given, Mass of water = 4.0 kg

Water is heated by = 8 × 10² W = 800 W

Time = 10 min = 10 × 60 = 600 s

Now, using the equation of specific heat,

Q = mcΔT

where c is the specific heat capacity of water = 4186 J/kg°C

Q = Pt

Substituting,

Pt = mcΔT

800 × 600 = 4 × 4186 × ΔT

480000 = 16744 × ΔT

ΔT = 28.667

Temperature increased, ΔT = 28.667°C

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Answer:

Radio Waves

Explanation:

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A radar gun uses radio waves to tell how far away an object is. To do that, the radar tool emits a focused radio wave and listens for any echo. If there is an item, say a car within the route of the radio wave, it's going to replicate some of the electromagnetic energy, and the radio wave will return to the radar gun. Radio waves flow via the air at a steady pace, so the radar gun can calculate how far the object is based totally on how long it takes the radio signal to return.

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2 years ago
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Answer:

Explanation:

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Putting the values in the equation

Q = \frac{.8 \times32\times(25 - 0 )\times1}{.0062 }

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b )

energy lost in one day

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6 0
3 years ago
Why is it difficult to move the heavier object than the lighter object on any surface <br>​
juin [17]

Answer:

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2 years ago
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