2 years ago

Tim has just jumped out of an airplane.The force of gravity pulls him downward,while air resistance pushes him upward

Chemistry

1 answer:

lesya692 [45]2 years ago

5 0

Answer:

ya, it's gravity. What is the problem??

Explanation:

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juin [17]

Answer:

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2 years ago

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When heated, solid copper(II) carbonate decomposes to solid copper(II) oxide and carbon dioxide gas. Give the balanced chemical

Vlad [161]

Answer:

Explanation:

CuCO3(s) ====> Cu(ii)O(s) + CO2(g)

Nothing else needs to be done. The equation is balanced.

8 0

2 years ago

Please Help!!!!!!!!!!!!!

vesna_86 [32]

Answer:

The answer is B, 106

Explanation:

looked it up

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2 years ago

Need help !!!!! ASAP

Galina-37 [17]

Answer:

Barometer.

Explanation:

A barometer is a scientific instrument used to measure air pressure. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, high pressure systems and frontal boundaries.
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8 0

2 years ago

An unknown element is a mixture of

seropon [69]

Answer:

10.13086%

Explanation:

129y + 132(1-y) = 129.91

129y + 132 - 132y = 129.91

-3y = -2.09

y = 0.69666 (5 s.f.)

% abundance of 132X = 100% - (129×0.69666)%

= 100% - 89.86914%

= 10.13086%

= 10.1% (3 significant figures)

*y is just a variable for the equation

8 0

2 years ago