Ask question

Ask question

All categories

anzhelika [568]

3 years ago

8

PLEASE HELP!!!!! In which medium does sound travel fastest.

2 answers:

Jobisdone [24]3 years ago

7 0

Answer:

D. Cast iron

Explanation:

Sound requires a medium to travel. More specifically, it relies on medium particles to vibrate, touching each other and propagating the sound through the medium. Knowing that then, it should follow that solids are the best conductors of sound because the particles in a solid are packed tightly together which vibrations travel faster unlike in a gas where it takes a lot for particles to touch since they are so far apart from each other.

So cast iron is the correct answer.

Art [367]3 years ago

3 0

<span>Sound travels fastest through solids, slower through liquids and slowest through gases.

Answer: Cast Iron, D.
</span>

You might be interested in

An engine does 25 J of work and exhausts 20 J of waste heat during each cycle. If the cold-reservoir temperature is 30 ∘C, what

hodyreva [135]

Answer:

T₂=659.25 K

Explanation:

Given that

W= 25 J

Qr = 20 J

T₁ = 20⁰ = 20 +273 = 293 K

The minimum temperature of the hot reservoir = T₂

If the engine is Carnot engine then

Qa= W+ Qr

Qa=25 + 20 J

Qa= 45 J

$\dfrac{Qa}{Qr}=\dfrac{T_2}{T_1}$

$T_2=\dfrac{Qa}{Qr}\times T_1$

$T_2=\dfrac{45}{20}\times 293\ K$

T₂=659.25 K

Therefore the temperature of hot reservoir will be 659.25 K

4 0

4 years ago

A BALL IS THREWN WITH AN ANGULAR DIRECTION TOTHE HORIZONTAL AXIS .IT TAKES 4SECONDS TO MOVE BETWEEN TWO PILLARA WICH HAS A HEIGH

hjlf

Answer:

So -24.5 m merely means the depth of the base of the tower ie the ground from the top of the tower. So wrt the ground height of the tower = 24.5 m.

Explanation:

6 0

3 years ago

The specific heat of acetic acid is 2.07 J/gºC. If 1150 J of heat is

Doss [256]

Answer:

12.3 °C

Explanation:

Q=m*Cp*ΔT-->

1150=45*2.07*ΔT-->

ΔT=1150/93.15-->

ΔΤ=12.3 °C

4 0

3 years ago

A ball was rolling downhill at 2 m/s. After 5s, it was rolling at 90 m/s. What is its acceleration?

olga55 [171]

Answer:

17.6 m/s²

Explanation:

Given:

$v_{f}$ = 90 m/s (final velocity)

$v_{i}$ = 2 m/s (initial velocity)

Δt = 5s (change in time)

The formula for acceleration is:

$a_{avg}$ = Δv / Δt

We can find Δv by doing

Δv = $v_{f}$ - $v_{i}$

Replace the values

Δv = 90m/s - 2m/s

Δv= 88m/s

Using the equation from earlier, we can find the acceleration by dividing the average velocity by time.

$a_{avg}$ = Δv / Δt

$a_{avg}$ = $\frac{88m/s}{5/s}$

acceleration = 17.6 $m/s^{2}$

4 0

3 years ago

John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positiv

DanielleElmas [232]

John's velocity is 20 m/s north.
Betty's velocity is 20 m/s south.
Their speeds are both 20 m/s.

3 0

3 years ago

Read 2 more answers