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3 years ago

10

The ultimate source of energy for almost all living organisms is A. animals. B. bacteria. C. plants. D. the Sun.

2 answers:

Airida [17]3 years ago

7 0

D. The sun is the answer :)

LUCKY_DIMON [66]3 years ago

4 0

The answer to this is the Sun.

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The combustion of ethanol, C2H5OH(l), in oxygen to form carbon dioxide gas and water vapor is shown by which balanced chemical e

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C2H5OH (l) + 3 O2 (g) = 2 CO2 (g)+ 3 H2O (l/g)

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2 years ago

Mason notices that his boat sinks lower into the water in a freshwater lake than in the ocean. What could explain this?

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3 years ago

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Which of these terms refers to rock material that has been weathered physically, chemically, and biologically?

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2 years ago

1 At current rates of use, known supplies of oil and natural gas may run out in less than _____ years. (1 point)

Aliun [14]

1. <span>At current rates of use, known supplies of oil and natural gas may run out in less than 100 years.
2. The country is
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3 years ago

A point charge of 4 μС is located at x =-30 cm, and a second point charge of-10 pC is located at x-+4.0 cm. where should a third

aksik [14]

Answer:

it is to be placed at x = 3.1 cm

Explanation:

Electric field due to charge placed at x = -30 cm

so we have

$E_1 = \frac{kq}{x^2}$

$E_1 = \frac{9 \times 10^9(4\times 10^{-12})}{0.30^2}$

$E_1 = 0.4 N/C$ towards left

now electric field due to another charge placed at x = 4 cm

$E_2 = \frac{9 \times 10^9(10\times 10^{-12})}{0.04^2}$

$E_2 = 56.25 N/C$ towards Right

now we need electric field due to 6 pC must be equal to

$E = 56.25 - 0.4$

$E = 55.85 N/C$ towards Left

so we have

$55.85 = \frac{9 \times 10^9(6 \times 10^{-12})}{r^2}$

$r = 0.031 m$

so it is to be placed at x = 3.1 cm

3 0

3 years ago