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Gennadij [26K]
2 years ago
5

True or False: There are five (5) of Newton's Laws of Motion *​

Chemistry
2 answers:
kvasek [131]2 years ago
5 0

Answer:

False

there is three

Explanation:

Vanyuwa [196]2 years ago
3 0

Three laws are combined together which is further known to us as Newton ’s three laws of motion. These three newton’s laws of motion are: Law I – Newton’s first law of motion Law II – Newton’s second law of motion

Hope this helps :)

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What is the energy change if 84.0 g of calcium oxide (CaO) reacts with excess water in the following reaction?
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calculation
heat  =  number of moles  x  delta H

delta H = - 65.2  Kj/mol

first find the number of  moles  of  CaO reacted

moles = mass/molar mass
the molar mass  of CaO =  40 +  16=  56 g/mol
mass = 84 g
moles therefore = 84 g/56 g/mol =1.5 moles

Heat is therefore =  1.5 moles  x -65.2 = - 97.8 Kj = -98 Kj

  since  sign is  negative  the   energy  is released 

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If the distance between two objects is decreased to - of the original
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Explanation:

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That said, let's say that our equation for the initial force is:

F = G\frac{m_1m_2}{R^2}The problem states  that  the distance decrease to 1/10 of the original distance, this means:[tex]R_2 = \frac{1}{10}R

And the force at this distance would be written in terms of the same equation:

F_2 = G\frac{m_1m_2}{R_2^2}

Find the ratio between the final and the initial force:

\frac{F_2}{F} = \frac{G\frac{m_1m_2}{R_2^2}}{G\frac{m_1m_2}{R^2}}

Substitute the value for the final distance in terms of the initial distance:

\frac{F_2}{F} = \frac{G\frac{m_1m_2}{(\frac{R}{10})^2}}{G\frac{m_1m_2}{R^2}}

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\frac{F_2}{F} = \frac{\frac{1}{100R^2}}{\frac{1}{R^2}}=\frac{1}{100}

This means the new force will be \frac{1}{100} of the original force.

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