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Ivanshal [37]
3 years ago
10

After pulling the string tight, Miguel talked into his aluminum can. Brian could hear Miguel's voice through the aluminum can at

tached to the string. Which of the following best explains the sound Miguel made?
A.
The sound traveled through the air but not through the string.
B.
The sound traveled through the string but not through the air.
C.
The sound traveled through the string and the air at different speeds.
D.
The sound traveled through the string and the air at the same speeds.
Physics
1 answer:
Alex73 [517]3 years ago
8 0

Answer:

option C is correct✅✅✅✅✅

...............

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Which of the following is not a type of system?
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What force is required to accelerate a body with a mass of 15 kilograms at a rate of 8 m/s²?
mihalych1998 [28]

Newton's Second law of motion: 

                  Force = (mass) x (acceleration)

                  Force = (15kg) x (8m/s²) = 120 kg-m/s² = 120 newtons
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Comparing X-ray to radio wave, which has a shorter wavelength?
Daniel [21]

Answer:

x-ray

Explanation:

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Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes the
yaroslaw [1]

Answer:

 K_a = 8,111 J

Explanation:

This is a collision exercise, let's define the system as formed by the two particles A and B, in this way the forces during the collision are internal and the moment is conserved

initial instant. Just before dropping the particles

          p₀ = 0

final moment

          p_f = m_a v_a + m_b v_b

          p₀ = p_f

          0 = m_a v_a + m_b v_b

tells us that

          m_a = 8 m_b

         

           0 = 8 m_b v_a + m_b v_b

           v_b = - 8 v_a                    (1)

indicate that the transfer is complete, therefore the kinematic energy is conserved

starting point

           Em₀ = K₀ = 73 J

final point. After separating the body

          Em_f = K_f = ½ m_a v_a² + ½ m_b v_b²

           K₀ = K_f

           73 = ½ m_a (v_a² + v_b² / 8)

           

we substitute equation 1

           73 = ½ m_a (v_a² + 8² v_a² / 8)

           73 = ½ m_a (9 v_a²)

           73/9 = ½ m_a (v_a²) = K_a

            K_a = 8,111 J

3 0
3 years ago
Q: A: Sarah and Maria made a telephone using two cans and a string. It was a very long string. Maria went upstairs in her house
GrogVix [38]
This contraption is a lot of fun, and you really should try it
some time.

The sound waves move from one can to the other one 
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3 0
3 years ago
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