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umka2103 [35]
3 years ago
5

An ant carries a morsel of food 4.26 meters along a straight path to his nest. he then turns around and follows the path back to

the source of the food. what is his displacement when he arrives back at the food source? 0.00 meters 2.13 meters 4.26 meters 8.52 meters
Chemistry
1 answer:
SVEN [57.7K]3 years ago
5 0
<span>Answer: 0.00 meters

  Solution:

    Step 1: Define displacement DISPLACEMENT = a vector quantity that describes "linear or angular distance in a given direction between a body or point and a reference position."

  Step 2: Understand the question

 Assumption 1: Assume that when the ant moves 4.25 meters from its origin to its nest, it is moving in a positive direction (on a graph you would draw a line along the x-axis from its origin to +4.25).

  Assumption 2: Assume that when the ant "turns around...back to the source of food", it is moving back in the negative direction (towards the origin).

   Step 3: Analyze the question

  What is the distance between where the ant originally started and where it ended its journey?

  The ant started and ended its journey in the same place.

 While it traveled a distance of 8.52 meters (2 * 4.26 = 8.52), it's displacement is actually 0.00 meters (4.26 + (-4.26) = 0.00)

  Therefore, the answer is 0.00 meters</span>
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To make use of an ionic hydrate for storing solar energy, you place 422.0 kg of sodium sulfate decahydrate on your house roof. A
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Complete Question

To make use of an ionic hydrate for storing solar energy, you place 422.0 kg of sodium sulfate decahydrate on your house roof. Assuming complete reaction and 100% efficiency of heat transfer, how much heat (in kJ) is released to your house at night? Note that sodium sulfate decahydrate will transfer 354 kJ/mol.

Answer:

The amount of energy released is x = 4.63650 *10^5 KJ

Explanation:

Number of moles is mathematically represented as

                         n =\frac{mass}{Molar\ Mass}

substituting 422.0kg = 422 *10^3g for mass of sodium sulfate decahydrate(Na_2 SO_4 \cdot 10H_2 O), 322.2g/mol (This value is a constant )for the molar mass of sodium sulfate decahydrate

                        n= \frac{422*10^3}{322.2}

                           = 1309.7 \ moles

From the question we are told that

            1 mole of sodium sulfate decahydrate generates 354KJ of energy

         So  1309.7 mole would generate  x

Now stating the relation mathematically

                 1 mol → 354KJ

                 1309.7 mol → x

=>      x = 4.63650 *10^5 KJ

                   

5 0
3 years ago
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