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cestrela7 [59]
2 years ago
9

2) Two students are running in a cross country race. One has a mass of 60 kg, while the other has a mass of 70 kg. If they are b

oth running with a speed of 7 m/s, which has more momentum? Why?​
Chemistry
1 answer:
Iteru [2.4K]2 years ago
4 0

Answer:

The second student with mass 70kg has more momentum

Explanation:

Using the formula:

p = m × v

Where;

p = momentum (kgm/s)

m = mass (kg)

v = velocity (m/s)

According to this question, two students are running in a cross country race.

Student 1 has the following; m = 60kg, v = 7m/s

Student 2 has the following; m = 70kg, v = 7m/s

Using p = mv

Student 1, p = 60 × 7 = 420 kgm/s

Student 2, p = 70 × 7 = 490 kgm/s

From the result of the above calculations, student 2 with mass 70kg has more momentum.

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19. Reaction Will occur.

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21. Reaction will occur.

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25. Reaction won't occur.

<h3><u>Explanation</u>:</h3>

The reaction rate of the metals with water, steam, acid, or hydroxides or their inert behavior towards them are noted in the metal activity series.

It contains all the metals one after the other which and the upper metal can replace the lower metal from its salt.

Calcium can replace hydrogen from acid, so the reaction will occur in 18. The products formed are calcium phosphate and hydrogen gas.

Chlorine is more reactive than bromine. So it can replace bromine from its salt to from bromine gas and magnesium chloride.

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Zinc can replace hydrogen from acid. So the products will be zinc chloride and hydrogen gas.

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3 years ago
If you have 3 moles of a gas at a pressure of 2.5 atm and a volume of 8 liters, what is the temperature?
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d

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2 years ago
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Have a blessed day and God bless.
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