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BabaBlast [244]

3 years ago

12

A wave is moving toward the shore If its frequency is 2.7 hertz, what is its wavelength? What would the correct number of signif

icant figures be?

1 answer:

TiliK225 [7]3 years ago

7 0

When multiplying and deviding follow the least number of sf.
since wavelength = 1/period
hence wavelength=1/2.7
=0.37 (2sf)

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Is the equation Ag2O ----> Ag+ O2 balanced

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2. ATO kg bouting ball would require what force to accelerate down an alleyway at a rate of ons?

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Answer:

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<em>2. A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3m/s² ?</em>

Notice that I completed the question with the garbled and missing values:

<u>Data:</u>

F = ?

m = 10 kg

a = 3m/s²

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<u>Physical principles:</u>

Newton's second law: $F=m\times a$

<u>Solution:</u>

Substitute and compute

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<em>3. Salty has a car that accelerates at 5 m/s². If the car has a mass of 1000 kg, how much force does the car produce?</em>

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<u>Data:</u>

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Substitute and compute

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<em>4. What is the mass of a falling rock if it produces a force of 147 N?</em>

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F = 147N

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F= 14,000N

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<u>Physical principles:</u>

Second Newton's law: $F=m\times a$

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Clear m from Newton's second law

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The solution of this problem with explaining the solution?

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Answer:

Molarity = moles / volume

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= 0.0150 M × 0.08189L

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moles of CaCO3 = 0.0123 mol of HCl× 1mol CaCO3/ 2mol HCl

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∴ the tablet has 0.00614 mol of CaCO3.

Explanation:

Step 1:

In the above-experiment problem, HCl acid solution is basically treated with CaCO3 base active in the tablet.

The mass of CaCO3 present in the tablet must be obtained in milligram (mg).

First, write down the balanced reaction between HCl and CaCO3

2Hcl aq + CaC03 s ⇒ CaCl2 aq + H2O l + C02 g

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∴ for each mole of calcium carbonate there would be twice the moles of HCl required for neutralization.

Step 2

the volume is 81.89 mL (i.e 0.08189 L) of 0.150 M HCl neutralizes the whole tablet containing unknown amount of CaCO3.

So, the number of moles of HCl present in the taken volume is calculated

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