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Kruka [31]
3 years ago
10

An object becomes positively charged when it

Physics
1 answer:
Montano1993 [528]3 years ago
8 0

Answer:

D

Explanation:

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9. Complete the following statement:
mario62 [17]

Answer:

E) the flow of energy due to a temperature difference.

Explanation:

Heat can be described as the flow of energy due to a temperature difference.

Which is expressed mathematically as;

H = MCΔT

Where;

H is the quantity of heat in a body, measured in Joules

M is the mass of the body, measured in kg

C is the specific heat capacity of the body, J/kg.K

ΔT is change in temperature or temperature difference.

So, heat energy in any system flows from a hotter region to a colder region due to temperature difference.

E) the flow of energy due to a temperature difference.

7 0
3 years ago
What are the like terms in the expression? 4m-9+3n+2
wel
-9 and +2
Hope I helped :)

5 0
3 years ago
Read 2 more answers
A steel beam hangs from a cable as a crane lifts the beam. What forces act on the beam?.
DerKrebs [107]

The forces that act on the beam are gravity and tension in the cable .

Gravity can be defined as the force that exists almost among all material objects that exist in the universe . Gravity is operating among objects of all sizes starting from subatomic sized particles to clusters of galaxies .It is the force that causes the free fall of an apple from the tree on the ground and also the movement of planets around the sun .

Tension can be defined as a force along the length of a medium , the force here is especially carried by a flexible medium such as a rope or a cable . The SI unit of tension is Newton per meter .

The forces that act on the beam are gravity and tension in the cable .

To know more about force checkout :

brainly.com/question/12970081

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7 0
1 year ago
The number of vacancies in some hypothetical metal increases by a factor of 5 when the temperature is increased from 1080 K to 1
Elena L [17]

Answer:

E = 15.7 KJ/mol

Explanation:

The number of vacancies in a metal is given by

      n = n₀ e^{-E/KT}

They tell us that

     n = 5 no

We replace

      5 n₀ = n₀   e^{-E/KT}

      -E / KT = ln 5

       E = KT ln 5

       E = 1,381 10⁻²³  1170 ln 5

        E = 2.6 10⁻²⁰ J

To take (J / mol) we multiply between Avogadro's number

        E = 2.6 10⁻²⁰ 6.022 10²³

        E = 1.57 10⁴ J / mol

        E = 15.7 KJ/mol

6 0
3 years ago
What unstable isotope would be best to refine the date of bones found in a cave hearth built by humans between 30,000 and 50,000
Aleks04 [339]

Answer:

Carbon - 14 Isotope

Explanation:

Carbon - 14 is an unstable and weak radioactive carbon isotope that is used to determine the age of an organic matter (i.e Carbon Dating).

3 0
3 years ago
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