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erica [24]
3 years ago
13

According to John Dalton’s observations when elements combine in a compound

Physics
2 answers:
Andrej [43]3 years ago
6 0

<u>Answer:</u> When elements combine in a compound, the ratio of their masses is always the same

<u>Explanation:</u>

Dalton's theory is based on mainly two laws:

  • Law of conservation of mass
  • Law of constant composition.

Law of conservation of mass states that mass can neither be created nor be destroyed, but it can transformed from one form to another form.

Law of constant composition states that a compound always contain the elements in the fixed ratio by their masses.

<u>For Example:</u> In water (H_2O), the hydrogen and oxygen are present in the fixed ratio of 1 : 9 by their mass.

Hence, when elements combine in a compound, the ratio of their masses is always the same

gayaneshka [121]3 years ago
3 0

The answer is A.) The ratio of thier masses is always the same

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Answer:

The current in the circuit decrease slowly .

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3 0
3 years ago
a spiral spring of natural length 10.0cm has a scale pan hanging freely in its tower ends . When an object of mass of 20g is pla
weqwewe [10]

Answer:

Explanation:

There seems to be a typo in the problem statement.  It says the spring stretches to a shorter length after more mass is added.  Please check the problem statement.  I'm going to do the calculations assuming that the first length should be 11.80 cm and the second length should be 12.05 cm.

Hooke's law states that the force needed to compress or extend a linear spring is:

F = kΔx, where k is the stiffness and Δx is the displacement.

When a 20g object is placed in the pan, the spring stretches to a length of 11.80 cm.  The force of the spring is counteracting the weight of both the pan and the object. Therefore:

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And when another 30g object is placed in the pan, the spring stretches to a length of 12.05 cm.

(m + 0.020 + 0.030) g = k (0.1205 - 0.100)

We now have two equations and two variables.  If we divide the second equation by the first equation:

(m + 0.050) / (m + 0.020) = (0.1205 - 0.100) / (0.1180 - 0.100)

(m + 0.050) / (m + 0.020) = 0.02050 / 0.0180

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4 0
3 years ago
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Nady [450]

Answer:

Explanation:

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Question 15)
RUDIKE [14]

Answer:

k Nishant

Explanation:

i think option A

8 0
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