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stiks02 [169]
3 years ago
12

The element chlorine has two naturally occurring isotopes. About 75% of chlorine isotopes are Cl-35 and about 25% are Cl-37.

Physics
2 answers:
Mila [183]3 years ago
8 0

ur answer i would beileve is a

Salsk061 [2.6K]3 years ago
7 0

Answer:

A) 35.45 amu

Explanation:

Average molar mass is given as

M_{avg} = \frac{n_1M_1 + n_2M_2}{n_1 + n_2}

here we know that

n_1 = 0.75

M_1 = 35

n_2 = 0.25

M_2 = 37

now we have

M_{avg} = \frac{0.75(35) + 0.25(37)}{0.75 + 0.25}

M_{avg} = 35.5

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Answer:

B. When the racket hits the tennis ball with a force, the tennis ball applies an equal but opposite force to the racket.

Explanation:

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A spring on a horizontal surface can be stretched and held 0.2 m from its equilibrium position with a force of 16 N. a. How much
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Answer:

a   W_{3.5} = 490 \  J

b  W_{2.5} =  250 \  J

Explanation:

Generally the force constant is mathematically represented as

       k  = \frac{F}{x}

substituting values given in the question

=>   k  = \frac{16}{0.2}

=>   k  =  80 \ N /m

Generally the workdone  in stretching the spring 3.5 m is mathematically represented as

       W_{3.5} =  \frac{1}{2}  *  k  *  (3.5)^2

=>     W_{3.5} =  \frac{1}{2}  *  80  *  (3.5)^2

=>    W_{3.5} = 490 \  J

Generally the workdone  in compressing the spring 2.5 m is mathematically represented as

        W_{2.5} =  \frac{1}{2}  *  k  *  (2.5)^2

=>      W_{2.5} =  \frac{1}{2}  *  80 *  (2.5)^2

=>       W_{2.5} =  250 \  J

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Explanation:

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