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3 years ago

In which type of material will sound generally travel the fastest?

2 answers:

8 0

The speed of sound is not constant in all materials. speed of sound is determined by elasticity,density, and temperature. S<span>ound does travel faster in solids than in water and air.
Vaccum is an empty space through which sound cannot travel through. This is because sound is basically vibrating properties and in a vacuum there are no properties.</span>

Alexxx [7]3 years ago

7 0

-speed of sound is not constant in all materials. speed of sound is determined by elasticity,density, and temperature. Sound defiantly travels faster in solids than in water and air.-Vaccum is an empty space and sound cannot travel through it. This is cuz sound is basically vibrating properties and in a vacuum there has no properties.

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Indigenous people sometimes cook in watertight baskets by placing hot rocks into water to bring it to a boil. What mass of 500ºC

scoray [572]

Answer:

m = 4.65 kg

Explanation:

As we know that the mass of the water that evaporated out is given as

$m = 0.0250 kg$

so the energy released in form of vapor is given as

$Q = mL$

$Q = (0.0250)(2.25 \times 10^6)$

$Q = 56511 J$

now the heat required by remaining water to bring it from 15 degree to 100 degree

$Q_2 = ms\Delta T$

$Q_2 = (4 - 0.025)(4186)(100 - 15)$

$Q_2 = 1.41\times 10^6J$

total heat required for above conversion

$Q = 56511 + 1.41 \times 10^6 = 1.47 \times 10^6 J$

now by heat energy balance

heat given by granite = heat absorbed by water

$m(790)(500 - 100) = 1.47 \times 10^6$

$m = 4.65 kg$

4 0

4 years ago

A 10-ohm resistor has a constant current. If 1200 C of charge flow through it in 4 minutes what

Amanda [17]

Answer:

B 5.0 A .

Explanation:

Hello.

In this case, since we know the charge (1200 C), time (4 min =240 s) and resistance (10Ω) which is actually not needed here, we compute the current as follows:

$I=\frac{Q}{t}$

Then, for the given data, we obtain:

$I=\frac{1200C}{4min}*\frac{1min}{60s}\\\\I=5A$

Therefore, answer is B 5.0 A .

Best regards!

4 0

3 years ago

9. 2076 Set B Q.No. 9b Two galvanometers, which are otherwise identical; are fitted with different coils. One has coil of 50 tur

Hunter-Best [27]

The ratio of the deflection when each is connected in turns to a cell of e.m.f 25 V and internal resistance 50 ohms is 13: 12

<h3></h3><h3>What is internal resistance?</h3>

Internal resistance can be described as the resistance within a battery, or other voltage source, that causes a drop in the source voltage when there is a current.

The parameters given are :

Coil 1 = 50 turns

Coil 2 = 500 turns

Resistance 1 = 1022

Resistance 2 = 6002

Internal resistance = 50 ohms

Emf = 25v

I = 25/ 50+ 10

I = 25/60

I = 5/ 12 A

$I_{2}$ = 25/50+ 600

= 25/ 650

= 5/ 130 A

The ratio of the deflection when each is connected in turns to a cell of e.m. 25 V and internal resistance 50 ohms =

Q1/ Q2

Q1 = N1 x B x $I_{1}$ / c

Q2 = N2 x B x $I_{2}$ / c

therefore Q/ Q2 = (50 x 5/12 )/ (500 x 5/130)

Q1 / Q2 = 12/ 13 which 13: 12

Therefore, The ratio of the deflection when each is connected in turns to a cell of e.m. 25 V and internal resistance 50 ohms is 13: 12.

Learn more about internal resistance at; brainly.com/question/20595977

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6 0

1 year ago

4. Provide an example of an isolated energy system and explain how it could be changed to create an open energy system. You may

GarryVolchara [31]

<span>Easy, take the top off your Thermos bottle filled with hot coffee. Assuming perfect insulation, that hot coffee is isolated from the environment; but when the top is opened the heat can now escape to that environment.

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
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4 0

3 years ago

Read 2 more answers

If we know the total energy in a system is 30 J, and we know the PE is 20 J. What is the KE?

svetoff [14.1K]

Can you give more description ??

3 0

3 years ago