3 years ago

Jacob eats a snack, and then plays basketball with his friends. When he shoots the basketball at the hoop, he is changing _____.

Chemistry

1 answer:

olchik [2.2K]3 years ago

3 0

A because it requires energy from food to move which is mechanical

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F. 1, 1

G. 1

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When you work out how many there are of each thing, the numbers that were already in there equal each other, do you just need to add ones in the other blanks.

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Heterogenous

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If the energy difference between two electronic states is 214.68 kJ / mol , calculate the frequency of light emitted when an ele

atroni [7]

${\qquad\qquad\huge\underline{{\sf Answer}}}$

Here we go ~

Energy difference btween the two electronic states can be expressed as :

${ \qquad \sf \dashrightarrow \: \Delta E = h\nu}$

[ h = planks constant, ${\: \nu }$ = frequency ]

$\qquad \sf \dashrightarrow \:214.68 = 39.79 \times 10 {}^{ - 14} \times \nu$

$\qquad \sf \dashrightarrow \: \nu = \cfrac{214.68}{39.79 \times 10 {}^{ - 4} }$

$\qquad \sf \dashrightarrow \: \nu = \cfrac{214.68}{39.79 } \times 10 {}^{14}$

$\qquad \sf \dashrightarrow \: \nu \approx 5.395 \times10 {}^{14} \:\:hertz$

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2 years ago

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3 years ago

Reactivity and flammability are are examples of properties.

nika2105 [10]

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they are eamples of chemical properties

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