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Vedmedyk [2.9K]
3 years ago
8

The speed of sound in air is four times as its speed in steel true or false?​

Chemistry
2 answers:
alexgriva [62]3 years ago
4 0

Answer:

.....false

Explanation:

the particles in the air are packed apart whereas the particles in steel are closely packed and sound travel faster in solids than in gasses..

pychu [463]3 years ago
4 0

Answer:

False

Explanation:

The speed of sound is quickest in mediums that have their molecules close apart.  The speed of sounds is quickest in solids, followed by liquids, and slowest in gasses.  The close the molecules are together, the quicker sound travels.  The sound would travel faster in the steel than in the air.

This is due to the fact that sound waves are compression waves.  This means that they rely on the way molecules collide with one another and act sort of like a spring.  

Fun fact: In the old days, people used to put their ears to the train tracks to see if a train is coming.  Sound moves so fast in metal that they can sense the vibrations miles before the train arrived.

Please mark this as brainliest if this helped you!

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The law of conservation of momentum states that if objects exert forces only on each other, their total momentum is ____________
iren2701 [21]

Answer:

Conserved.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

Momentum = Mass * Velocity

The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.

This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.

8 0
3 years ago
A jogger runs 3km in 0.3hr, then 7km in 0.70hr what is the average speed of the jogger
r-ruslan [8.4K]

Answer:

10 km/hr

Explanation:

We are told that a jogger runs;

3km in 0.3 hr and

7 km in 0.7 hr

We are required to determine the average speed;

We need to know that average speed is given by;

Average speed = Total distance ÷ total time

In this case;

Total distance = 10 km ( 3km + 7 km)

Total time = 0.3 hr + 0.7 hr

                = 1 hr

Thus;

Average speed = 10 km ÷ 1 hr

                          = 10 km/hr

Therefore, the average speed of the jogger is 10 km/hr

5 0
4 years ago
Why is copper a good electrcity conducter
Anvisha [2.4K]

Explanation:

<h3>HOPE IT WILL HELP YOU TO SOLVE YOUR PROBLEM.</h3>

3 0
3 years ago
Read 2 more answers
In a redox reaction what happens to a substance's charge when it is oxidized
Temka [501]
<span>oxidizing substance removes electrons from another substance, which are then added to itself, the oxidizing substance becomes “reduced” (more negative). And because it “accepts” electrons .</span>
5 0
3 years ago
You are performing a titration by adding a Strong Base to a solution of Weak Acid. At the equivalence point, will your solution
Alchen [17]

Answer:

Basic

Explanation:

The titration of a strong base with a weak acid would always result in a solution whose pH is greater than 7,i.e a basic solution. For this reason its advisable to use an indicator whose color change will occur in that pH range.

For other cases, the titration of a stong acid and strong will result in a neutral solution and the titration of a weak base versus a strong acid would result in an acidic solution.

3 0
3 years ago
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