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2 years ago

A wave has a frequency of 4.00 hz and a wavelength of 10.0 m. What is the speed of the wave?

1 answer:

6 0

First use this equation to find the wave speed: vms== =τµ/ 0.4/ 0.001 20 / Then use the equation for solving frequency of a wavelength, and solve for wavelength λ = v/f = 20/100 = .2 m = 20 cm.

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10) an object has mass of 50g 500mg and 0.1g. express the total mass of the object in grams

Pavel [41]

500 mg in g :

1 g ----------- 1000 mg
? -------------- 500 mg

500 x 1 / 1000 => 0.5 g

total mass:

50 g + 0.5 g + 0.1 g => 50.6 g

hope this helps!

8 0

2 years ago

Write the balanced chemical equation for the following: The destruction of a marble statuary by acid rain: aqueous nitric acid r

Mashcka [7]

Answer: The coefficient in front of nitric acid is 2

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas. Liquids are represented by (l) and gases are represented by (g).

The balanced chemical reaction is :

$CaCO_3(s)+2HNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+CO_2(g)+H_2O(l)$

7 0

2 years ago

Which weak acid solution has the greatest percent ionization? which weak acid solution has the greatest percent ionization? 0.14

sweet [91]

Answer:

0.0140 M H₂C₆H₆O₆.

Explanation:

We should mention the relation: Ka = α²C,

Where, Ka is the dissociation constant of the acid.

α is the degree of ionization of the acid.

C is the concentration if the acid.

The percent of ionization (α %) = α x 100.

α = √Ka/C

∴ α is inversely proportional to the concentration of the acid.

So, the acid with the lowest concentration has the greatest percent ionization.

5 0

3 years ago

Help pleasee I need help to write the formulas i’m so lost

pishuonlain [190]

Answer:

NH4

Explanation:

3 0

2 years ago

Crystals are made using supersaturated solutions of solids in water. These solutions hold more of the solute than they would at

Rudik [331]

Solubility controls the formation of crystals by the mechanism of oversaturation, therefore the correct answer is:

4. The water polo would need to be heated to a higher temperature, which would give molecules and ions more kinetic energy, increasing solubility.

Crystals are solid structures where there is a fixed spatial arrangement of the molecules, there are many preparation methods, a very practical method and obtaining good crystals is from supersaturated solutions.

Solubility is the mechanism by which a supersaturated solution is formed, for this it is used that the water when heated has more energy and manages to dissolve a greater amount of solute, therefore by decreasing the temperature and consequently reducing the solubility the solution is over saturated.

When introducing some means of disturbance in the solution, the excess of solute is deposited in the form of crystals of excellent quality, this growth method is called hydrothermal synthesis

To achieve controlled supersaturation and crystals the temperature must be controlled precisely, to allow the formation of the crystals.

In conclusion, solubility controls the formation of crystals by the mechanism of over saturation, therefore the correct answer is:

4. The water polo would need to be heated to a higher temperature, which would give molecules and ions more kinetic energy, increasing solubility.

Learn more about hydrothermal growth here: brainly.com/question/7821375

3 0

2 years ago

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