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NNADVOKAT [17]
3 years ago
11

An experiment was set up to test the hypothesis that all plants will grow faster in a "super soil" versus regular potting soil.

Six identical plants were tested, three in the "super soil" and three in regular potting soil. All plants received the same amount of water, light and fertilizer. Which of the following items would improve the experiment?
add more types of plants


test one plant with no fertilizer


use different soils for each plant


expose all six plants to green light
Chemistry
1 answer:
dolphi86 [110]3 years ago
5 0

Answer:

add more types of plants

Explanation:are you kidding me i’m doing this stuff and i’m in 7th grade

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A cube of steel with a mass of 150 grams is heated from 60°C to 150°C.
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Answer:

1.

The energy lost by the water is given by:

where

m = 3.0 kg = 3000 g is the mass of water

Cs = 4.179 J/g•°C is the specific heat

is the change in temperature

Substituting,

2.

The energy added to the aluminium is given by:

where

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Cs = 0.900 J/g•°C is the specific heat

is the change in temperature

Substituting,

4. 42.9 g

The mass of the water sample is given by

where

is the heat added

is the temperature change

Cs = 4.179 J/g•°C is the specific heat

5. 115.5 J

The heat used to heat the copper is given by:

where

m = 5.0 g is the mass of copper

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is the change in temperature

6. 0.185 J/g•°C

The specific heat of iron is given by:

where

Q = -47 J is the heat released by the iron

m = 10.0 g is the mass of iron

is the change in temperature

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Substituting,

Substituting,

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