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4 years ago

What is a sound wave

Physics

2 answers:

Maksim231197 [3]4 years ago

5 0

Answer:

A wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.

Dimas [21]4 years ago

4 0

A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium (such as air water or any other liquid or solid matter) as a Propagates away from the source of the sound

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An object with a resistance of 28 Ω has 76 V applied to it. How much electric current is going through this object? Answer in un

12345 [234]

Answer : The electric current of a circuit is, 2.8 A.

Explanation :

Using Ohm's law :

$V=I\times R$

Or,

$I=\frac{V}{R}$

where,

R = resistance of a circuit = 28 Ω

V = voltage of circuit = 76 volts = 76 V

I = current flowing in a circuit = ?

Now put all the given values in the above formula, we get :

$I=\frac{V}{R}$

$I=\frac{76V}{28\Omega }$

$I=2.8A$

Therefore, the electric current of a circuit is, 2.8 A

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3 years ago

What is the net force required to accelerate a 884 kg car at 2 m/sec2?

EastWind [94]

Answer:

1768 N

Explanation:

We can solve the problem by using Newton's second law:

$F=ma$

where

F is the net force acting on an object

m is the mass of the object

a is its acceleration

In this problem, we have a car of mass

m = 884 kg

And its acceleration is

$a=2 m/s^2$

Substituting into the equation, we find the net force on the car:

$F=(884)(2)=1768 N$

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3 years ago

What maximum force do you need to exert on a relaxed spring with a 1.2×104-n/m spring constant to stretch it 6.0 cm from its equ

Elena L [17]

Answer:

Maximum force will be equal to 720 N

Explanation:

We have given that spring constant $k=1.2\times 10^4N/m$

Maximum stretch of the spring x = 6 cm = 0.06 m

We have to find the maximum force on the spring

We know that spring force is given by

$F=kx=1.2\times 10^4\times 0.06=720N$

So the maximum force which is necessary to relaxed the spring will be eqaul to 720 N

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4 years ago

Which statement best answers the question, "Why is copper a good conductor of electricity?"?

Yanka [14]

C copper has an equal amount of protons allowing electricity to move freely through it

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3 years ago

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What's the most reliable source of energy on earth?

slavikrds [6]

The sun or solar energy is the most reliable source of energy on Earth.

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4 years ago