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damaskus [11]
3 years ago
10

London dispersion forces occur between molecules that are

Physics
1 answer:
SCORPION-xisa [38]3 years ago
3 0

Answer:

c

Explanation:

London dispersion forces are weak intermolecular forces and are considered van der Waals forces. Temporary dipoles can occur in non-polar molecules when the electrons that constantly orbit the nucleus occupy a similar location by chance.

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What happens to the temperature during an endothermic reaction? ANSWERS; The temperature stays constant. The temperature will de
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Answer:

The temperature will decrease (get colder).

Explanation:

Enthalpy changes are heat changes accompanying physical and chemical changes. The enthalpy change is the difference between the sum of the heat contents of products and the sum of heat contents of reactants.

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  • The surrounding becomes colder at the end of the reaction and so is the reaction itself.
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If you wanted to move an electron from the positive to the negative terminal of the battery, how much work W would you need to d
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A unit for measuring frequency is the <br> A. hertz.<br> B. watt.<br> C. ampere.<br> D. ohm.
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3 years ago
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A converging lens has a focal length of 20 cm. An object 1 cm tall is placed 10 cm from the center of the lens. What is the heig
SCORPION-xisa [38]

Answer: 2 cm

Explanation:

Given , for a converging lens

Focal length : f=20\ cm

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Using lens formula: \dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}, we get

\dfrac{1}{20}=\dfrac{1}{v}+\dfrac{1}{10}, where v = image distance from the lens.

On solving aboive equation , we get

\dfrac{1}{v}=\dfrac{1}{20}-\dfrac{1}{10}=\dfrac{1-2}{20}=\dfrac{-1}{20}\Rightarrow\ v=-20\ cm

Formula of Magnification : m=\dfrac{v}{u}=\dfrac{h'}{h} , where h' is the height of image.

Put value of u, v and h in it , we get

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Hence, the height of the image is 2 cm.

3 0
3 years ago
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