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Sedaia [141]
4 years ago
14

Why do soundwaves move faster than the ground than through the air​

Physics
1 answer:
Sati [7]4 years ago
8 0

Answer:

Particles of matter are packed more tightly in the ground than in the air

Explanation:

the reason is that sound waves are vibrations of the molecules of the medium: therefore, if the particles of the medium are closer together (as in solids), the vibrations can be transmitted faster, and the wave can travel faster

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A uniform meter stick is hung at its center from a thin wire. It is twisted and oscillates with a period of 5 s. The meter stick
rewona [7]

Answer:

The new time period is  T_2 =  3.8 \  s

Explanation:

From the question we are told that

  The period of oscillation is  T =  5 \ s

   The  new  length is  l_2  =  0.76  \ m

Let assume the original length was l_1 = 1 m

Generally the time period is mathematically represented as

         T  =  2 \pi   \sqrt{ \frac{ I }{ mgh } }

Now  I is the moment of inertia of the stick which is mathematically represented as

           I  =  \frac{m * l^2 }{12 }

So

        T  =  2 \pi   \sqrt{ \frac{  m * l^2 }{12 *   mgh } }

Looking at the above equation we see that

        T  \ \ \  \alpha  \ \ \  l

=>    \frac{ T_2 }{T_1}  =  \frac{l_2}{l_1}

=>    \frac{ T_2}{5} =  \frac{0.76}{1}

=>     T_2 =  3.8 \  s

3 0
4 years ago
Cam Newton can sprint 40 meters in 5.79 seconds! How fast can he run?<br> Show your work
Setler79 [48]

Speed=Distance/Time

Distance=40m,time=5.79seconds

S=40/5.79

=6.908m/s

6 0
3 years ago
Read 2 more answers
What’s the resistance in the circuit
inna [77]

Answer:

I = 0.75 A

Explanation:

The question is not to calculate the resistance, but to calculate the current. (The resistance is already given by the value of 2 Ohm).

U = I * R

I = U / R

with U = 1.5 V and R = 2 Ohm

I = 1.5 / 2

I = 0.75 A

3 0
3 years ago
The odometer of a car reads 2000km at the start of at trip and 2400km at the end of the trip. If the trip took 8h.calculate tge
DIA [1.3K]
Given:\\s=2400km-2000km=400km\\t=8h\\\\Find:\\v=?\\\\Solution:\\\\v= \frac{s}{t} \\\\v= \frac{400km}{8h} =50 \frac{km}{h} \\\\50 \frac{km}{h} \cdot \frac{1}{3,6} \approx 13,89 \frac{m}{s}
7 0
4 years ago
Calculate the momentum of the following objects:
In-s [12.5K]
I think/ believe it’s A
7 0
3 years ago
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