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kaheart [24]
3 years ago
7

Which one of the following scenarios accurately describes a condition in which resonance can occur? A. A column of air has a hei

ght equal to 1⁄8 of the wavelength of the sound waves produced by a tuning fork vibrating over the column of air in an open pipe that's partially immersed in water. B. A vibrating tuning fork is struck and begins to vibrate as the object used to strike it is placed away from the tuning fork. C. A person is holding a tuning fork on one end of a football field and another person is holding a separate tuning fork on the opposite end of the field. D. A pipe's length is equal to 1⁄2 of the wavelength of the sound waves produced by a tuning fork vibrating over one end of the pipe that's open to the air at both ends.
Chemistry
1 answer:
bixtya [17]3 years ago
7 0

The correct answer from the choices is: D

Resonance is an event where an external force or vibration moves another system to oscillate with higher amplitude at certain frequences or there is a transfer of energy between two or more different storage modes. 


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2.50 g of an unknown base is dissolved in 289 mL of water and has a concentration of 0.216 M. What is the identification of the
AnnyKZ [126]

Answer:

The answer to your question is: A. NaOH

Explanation:

Data

mass = 2.5g of unknown base

volume = 289 ml = 0.289 l

concentration = 0.216 M

What is the base= ?

Formula

 Molarity (M) = # moles / Volumen (V)

 # moles = M x V

Process

# moles = 0.216 x 0.289 = <u>0.062     in the solution</u>

MW NaOH = 23 + 16 + 1 = 40 g

MW LiOH = 7 + 16 + 1 = 24 g

MW KOH = 39 + 16 + 1 = 56 g

Rule of three

                        40 g of NaOH ------------------- 1 mol

                        2.5 g               --------------------  x

                 x = 2.5 x 1 /40 = <u>0.062 moles</u>  is the same amount of moles in the

                                                                    solution is the answer

                         24 g of LiOH ----------------- 1 mol

                         2.5 g         ---------------------   x

                x = 2.5 x 1 / 24 = 0.104 moles

                      56 g of KOH ------------------ 1 mol

                      2.5 g             --------------------  x

                x = 2.5 x 1 / 56 = 0.045

3 0
4 years ago
The energy of moving particles in a substance
Alecsey [184]

Answer: D, Thermal energy

Explanation: particles in a substance will move for one reason. That reason is heat. The hotter the substance the more the particles will move.

8 0
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Trava [24]
The best method for separating two liquids in a mixture is distillation among the choices. Distillation separates liquids in terms of their volatility. Evaporation separates liquid from solid. This also applies for filtration which applies porous media for separation. Sorting is applied for two or more different kinds of solids. Answer is distillation.
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4 years ago
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List the four forms of acid deposition.
liq [111]

Explanation:

rain, snow, cloud, fog or dry deposition - Dry particles, or gas

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42,000 mL is equal to L
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1000ml = 1l

42000ml = 42l

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