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8090 [49]
2 years ago
5

In the video, you saw that models must sometimes be changed. why does that happen?

Physics
2 answers:
Zielflug [23.3K]2 years ago
5 0

Models often need to be changed and updated based on new evidence.

inn [45]2 years ago
4 0
Because scientific data and discoveries will always keep coming out, so models must be updated from time to time.
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Before starting this problem, review Conceptual Example 3 in your text. Suppose that the hail described there comes straight dow
bulgar [2K]

Answer:

0.9 N

Explanation:

The force exerted on an object is related to its change in momentum by:

F=\frac{\Delta p}{\Delta t}

where

F is the force exerted

\Delta p is the change in momentum

\Delta t is the time interval

The change in momentum can be rewritten as

\Delta p = m(v-u)

where

m is the mass

u is the initial velocity

v is the final velocity

So the formula can be rewritten as

F=\frac{m(v-u)}{\Delta t}

In this problem we have:

\frac{m}{\Delta t}=0.030 kg/s is the mass rate

u=-15 m/s is the initial velocity

v=+15 m/s is the final velocity

Therefore, the force exerted by the hail on the roof is:

F=(0.030)(+15-(-15))=0.9 N

6 0
3 years ago
Which force is responsible for allowing carbon-14 to become stable? *
Bas_tet [7]

Answer:weak nuclear

Explanation:

There weak nuclear force is responsible for allowing carbon-14 to become stable

3 0
2 years ago
What is kinematics...? anyone on?​
mariarad [96]

Answer:

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Explanation:

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