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mars1129 [50]
3 years ago
14

Marina walked 2km in half an hour, what was her average speed during her walk?

Physics
1 answer:
ad-work [718]3 years ago
6 0

Answer:

4km/hr

Explanation:

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Could I get help on this question please . My parents won’t help me /:
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Answer:

Tarzan will be moving at 7.4 m/s.

Explanation:

From the question given above, the following data were obtained:

Height (h) of cliff = 2.8 m

Initial velocity (u) = 0 m/s

Final velocity (v) =?

NOTE: Acceleration due to gravity (g) = 9.8 m/s²

Finally, we shall determine how fast (i.e final velocity) Tarzan will be moving at the bottom. This can be obtained as follow:

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 2.8)

v² = 0 + 54.88

v² = 54.88

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v = √54.88

v = 7.4 m/s

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How does the latent heat of fusion of water help slow the decrease in air temperature,perhaps preventing temperatures from falli
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Answer:

Water has the ability to release a large amount of energy during the freezing process. All of this energy is released into the air, resulting in a greater movement of air particles that will increase the air temperature. This heat will prevent air temperatures from drastically falling below 0ºC.

Explanation:

The latent heat of water occurs when the water is changing its physical state. In other words, when substances are changing their physical state, the amount of heat calculated for this change is called latent heat, and as we have already said, this heat is not related to the heat exchanges between two systems, but the change of state. physicist.

When water is changing from its liquid state to a solid state, we call latent heat latent heat from fusion (this is because fusion is the name we give to when liquid water is turning to ice). In the process of freezing the page, latent heat releases a large amount of energy into the air near the water. This energy agitates the air molecules, generating heat and preventing the air from reaching temperatures below 0ºC.

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Examine the circuit. Pretend you are an electron flowing through this circuit and you are with a group of other electrons. Sudde
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You knew that this question is ridiculously easy.  So, just to
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Question 10 of 10
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it allows only a reduced number of electrons to flow through it.

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