CHEMISTRY MIDDLE SCHOOL

Record your findings about sound and light waves for each of the following. • Traveling through air
• Traveling through metal
• Why light travels faster

Answers

Answer 1
Answer:

Answer:

Sound waves travelling through the air: Sound waves travelling through air are just like longitudinal waves lacking compressions and rarefactions. The speed of sound waves in air is approximately 332 metres per second.

Light waves travelling through air: Light waves travel in air at a much faster rate than sound waves. Light waves can travel with a speed of 300 000 kilometres per second through air.

Sound waves traveling through metal: Sound waves travel about 17 times faster in metal as compared to air. The sound waves travel with an approximate speed of 5,960 meters per second in metals.

Light waves travelling through metal: The speed of light waves in a metal medium is usually at a net speed which is less than 3.00 x 108 m/s.

Light travels faster than sound waves because light waves are not pressure waves like the sound waves. They also do not require a medium as the sound waves.

Answer 2
Answer:

Answer:

Sound waves travelling through the air: Sound waves travelling through air are just like longitudinal waves lacking compressions and rarefactions. The speed of sound waves in air is approximately 332 metres per second.

Light waves travelling through air: Light waves travel in air at a much faster rate than sound waves. Light waves can travel with a speed of 300 000 kilometres per second through air.

Sound waves traveling through metal: Sound waves travel about 17 times faster in metal as compared to air. The sound waves travel with an approximate speed of 5,960 meters per second in metals.

Light waves travelling through metal: The speed of light waves in a metal medium is usually at a net speed which is less than 3.00 x 108 m/s.

Light travels faster than sound waves because light waves are not pressure waves like the sound waves. They also do not require a medium as the sound waves.

Explanation:


Related Questions

HIGH SCHOOL

When the disk of the moon masks the disk of the sun, it creates a _________ eclipse.

Answers

When the disk of the moon masks the disk of the sun, it creates a  solar eclipse.

What is solar eclipse?

A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of the Earth, totally or partially. Such an alignment occurs approximately every six months, during the eclipse season in its new moon phase, when the Moon's orbital plane is closest to the plane of the Earth's orbit. In a total eclipse, the disk of the Sun is fully obscured by the Moon.

In partial and annular eclipses, only part of the Sun is obscured. Unlike a lunar eclipse, which may be viewed from anywhere on the night side of Earth, a solar eclipse can only be viewed from a relatively small area of the world. As such, although total solar eclipses occur somewhere on Earth every 18 months on average, they recur at any given place only once every 360 to 410 years.

Learn more about solar eclipse,here:

brainly.com/question/17749647

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When the disk of the moon mask the the disk of the sun,it creates a (solar) eclipse.
MIDDLE SCHOOL

An adult human lung has a volume of 2.9 liters. If its volume decreases to 1.2 liters and it contains 0.049 mole of air after it exhales, how many moles of air does it contain when full?

Answers

Answer:

In full volume it contain 0.12 moles.

Explanation:

Given data:

Total volume= Vt = 2.9 L

Decreased volume= Vd = 1.2 L

Number of moles of air present in decreased volume= n = 0.049 mol

Number of moles of air in total volume= n = ?

solution:

Formula:

Vt/ Vd = n (in total volume) /n ( decreased volume)

2.9 L / 1.2 L = X / 0.049 mol

2.42 = X / 0.049 mol

X = 2.42 × 0.049

X = 0.12 mol

Answer:

D) 0.12 moles.

HIGH SCHOOL

Which of these describes an exothermic reaction? a. energy is created in the reaction
b. energy is released by the reaction
c. energy is absorbed by the reaction
d. no energy is transferred by the reaction.

Answers

Answer: correct option is B. Energy is released by the reaction

Explanation:

The exothermic reactions are the reactions in which energy is released.The released energy can be in the form of heat or light.

Temperature of the surrounding also increases.

For example:

  • Neutralization reaction between acid and base.

       

Above reaction takes place in the aqueous medium.After the reaction  mixtures becomes hot.

  • Burning of Magnesium ribbon      

       

In above reaction energy is released in the form light.

B. energy is released by the reaction 

Exothermic reactions release heat
ENDOthermic absorbs heat 
MIDDLE SCHOOL

Which TWO are most likely to form a compound?
C
Mg
S
Ar

Answers

Answer is Mr and S as MgS ..
HIGH SCHOOL

Assume that you have a new "triad" of elements (a, b and c.with similar properties. a is the smallest element and has a mass of 30 u. c is the largest element and has a mass of 90 u. the mass of b would be approximately ________ u.

Answers

Mass B = mass(A) + mass(A)
so in this case,40u+137u=177 u

2. 2
mass (B)=88.5u
HIGH SCHOOL

The notation for the nuclide 13755Cs gives information about (1) mass number, only
(2) atomic number. only(3) both mass number and atomic number(4) neither mass number nor atomic number

Answers

Answer is (3) both mass number and atomic number.

The notation is ₅₅¹³⁷Cs. The Cs represents the chemical symbol of Caesium element. The subscript number at the left hand side of the symbol indicates the atomic number. Hence, atomic number of Cs is 55. The superscript number at the left hand side of the symbol shows the mass number. Hence, the mass number of the Cs is 137.

HIGH SCHOOL

If two gases are present in a container, the total pressure in the container is equal to

Answers

 the sum of the partial pressures of each individual gas in the mixture.
This concept has to do with partial pressure. Note the following: In a mixture of gases, each gas has a partial pressure which is the hypothetical pressure of that gas if it alone occupied the volume of the mixture at the same temperature. The total pressure of an ideal gas mixture is the sum of the partial pressures of each individual gas in the mixture. The formula is represented by the equation: Pt = P1 + P2 + ... Pt is the total pressure of all the combined gases P1 is the partial pressure for gas 1 P2 is the partial pressure for gas 2 It can go on until you include all the gases in the system.
HIGH SCHOOL

6) At elevated temperatures, methylisonitrile (CH3NC) isomerizes to acetonitrile (CH3CN):CH3NC (g)  CH3CN (g)At the start of an experiment, there are 0.200 mol of reactant and 0 mol of product in the reaction vessel.After 25 min, 0.108 mol of reactant (CH3NC) remain. There are mol of product (CH3CN) in thereaction vessel.A) 0.200 B) 0.540 C) 0.022 D) 0.092 E) 0.308

Answers

Answer: The moles of product present in the vessel is 0.092 moles

Explanation:

For the given chemical equation:

We are given:

Initial moles of reactant = 0.200 moles

Unreacted moles of reactant = 0.108 moles

Reacted moles of reactant = 0.200 - 0.108 = 0.092 moles

By Stoichiometry of the reaction:

1 mole of reactant produces 1 mole of product

So, 0.092 moles of reactant will produce = of product

Hence, the moles of product present in the vessel is 0.092 moles

COLLEGE

How do particles move when they are changing phases?

Answers

They speed up when they get hotter and they slow down when they get colder. I think
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