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Lana71 [14]
2 years ago
14

A scientist observed that in the presence of light, plants use carbon dioxide and water to make glucose and oxygen. This chemica

l process is called photosynthesis. Which type of energy is transformed into chemical energy, based on the scientist's observations? Answer options with 4 options A. light energy from the sun B. kinetic energy from water C. chemical energy from oxygen D. heat energy from the environment
Chemistry
1 answer:
pav-90 [236]2 years ago
8 0

Answer:

Option A, light energy from the sun

Explanation:

In the process of photosynthesis, the energy from sun in the form of light and heat is taken to undergo glycolysis and prepare glucose/starch (chemical).  

Thus, the light and heat energy of sun is converted into the chemical energy.  

Option B and C are incorrect because no kinetic energy or chemical energy is taken from any source.  

Option D is also incorrect because heat is taken but it is not taken from the surrounding environment. The source of heat energy is sun.  

Thus, only option A is correct

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Result of the formation of positive and negative ions.

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A copper cylinder, 12.0 cm in radius, is 44.0 cm long. If the density of commoner is 8.90 g/cm3, calculate the mass in grams of
inna [77]

The mass of the copper cylinder is 177065.856g

Given:

Radius of the copper cylinder R=12cm

Height of the copper cylinder H=44cm

Density of the cylinder=8.90 \frac{g}{c m^{3}}

To find:

Mass of the copper cylinder

<u>Step by Step by explanation:</u>

Solution:

According to the formula, Mass can be calculated as

\rho=\frac{m}{v} and from this

m=\rho \times v

Where, m=mass of the cylinder

\rho =density of the cylinder

v=volume of the cylinder

And also cylinder is provided with radius and height value.

So volume of the cylinder is calculated as

v=\pi r^{2} h

Where \pi=3.14

r=radius of the cylinder=12cm

h=height of the cylinder=44cm

Thus, v=3.14 \times 12^{2} \times 44

v=3.14 \times 144 \times 44

v=19895.04 \mathrm{cm}^{3}

And we know that, m=\rho \times v

Substitute the known values in the above equation we get

m=8.90 \times 19895.04  

m=177065.856g or 177.065kg

Result:

Thus the mass of the copper cylinder is 177065.856g

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