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Hunter-Best [27]
3 years ago
7

What expression (formula) relates Kenetic energy of an object of mass to its momentum

Physics
1 answer:
zmey [24]3 years ago
3 0

Answer:

Correct answer:  Ek = I² / 2 · m

Explanation:

The formula by which kinetic energy is calculated is:

Ek = m V² / 2

The formula by which momentum i prefer the name impulse is calculated is:

I = m V

We will transform the formula for kinetic energy on the next way:

Ek = m V² / 2  we will multiply numerator and denominator with m and get:

Ek = m² V² / 2 m = (m v)² / 2 m = I² / 2 m

Ek = I² / 2 m

God is with you!!!

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Answer:the acceleration will double

Explanation:

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How much heat is needed to raise the temperature of an empty 2.0 x 101 kg vat made of
scZoUnD [109]

Answer:

Q = 7272 Kilojoules.

Explanation:

<u>Given the following data;</u>

Mass = 2.0*101kg = 202kg

Initial temperature, T1 = 10°C

Final temperature, T2 = 90°C

We know that the specific heat capacity of iron = 450J/kg°C

*To find the quantity of heat*

Heat capacity is given by the formula;

Q = mcdt

Where;

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Substituting the values into the equation, we have;

Q = 202*450*80

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6 0
3 years ago
List three cases in which potential energy becomes
olga55 [171]
1 Electrical Potential Energy, separating two charged plates will store energy as the plates want to return to their original position. 

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The only value that be controlled here is the height h.  The mass is constant, and acceleration due to gravity at that place is constant.

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This can be done by climbing up a table, or climbing up a building through the stairs, or by using a lift.
5 0
3 years ago
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