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Ostrovityanka [42]
3 years ago
13

HHHHHEEEELLLPP

Physics
2 answers:
Nina [5.8K]3 years ago
8 0
I believe the correct answer is a.) conduction <span />
AleksandrR [38]3 years ago
8 0
Here is your answer:

Your answer is A conduction.

Reason: Conductions is when for example boiling water you put a metal spoon in the boiling water within seconds the spoon is hot that's because the heat from the boiling water transfered into the spoon making it hot! Also its not convection because it can't no be transfered between a solid an in the questions it has the word "solid" its also not D because that's when something or someone is under a lot of heat making them hot within minutes and when it came down to rather conduction and insulation I choose conduction because insulation is used for medicines!

Your answer is A.
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A car traveling at 5m/s starts to speed up after 3 seconds its velocity has increased to 11 m/s what is its acceleration
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2 years ago
A person throws a pumpkin at a horizontal speed of 4.0 — off a cliff. The pumpkin travels 9.5 m horizontally
emmainna [20.7K]

Complete Question

A person throws a pumpkin at a horizontal speed of   4.0 m/s off a cliff. The pumpkin travels 9.5m horizontally before it hits the ground. We can ignore air resistance.What is the pumpkin's vertical displacement during the throw? What is the pumpkin's vertical velocity when it hits the ground?

Answer:

The  pumpkin's vertical displacement  is  H = 27 .67 \ m

The  pumpkin's vertical velocity when it hits the ground is  v_v__{f}} = 23.298 \  m/s

Explanation:

From the question we are told that

   The  horizontal speed is  v_h  =  4 m/s

    The horizontal distance traveled is  d =  9.5 \ m

The horizontal distance traveled is mathematically represented as

           S =  v_h * t

Where t is the time taken

substituting values

          9.5 =  4 * t

   =>     t =  \frac{9.5}{4}

            t = 2.38 \ sec

Now the vertical displacement is mathematically represented as

        H  =  v_v t  +  \frac{1}{2} a_v t^2

now the vertical velocity before the throw is  zero

    So

          H =  0 +  \frac{1}{2} (9.8) * (2.375)^2

          H = 27 .67 \ m

Now the final vertical velocity  is mathematically represented as

          v_v__{f}} =  v_v + at

  substituting values

             v_v__{f}} =  0 + (9.8)* (2.375)

            v_v__{f}} = 23.298 \  m/s

7 0
2 years ago
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