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Triss [41]
4 years ago
5

This is the sound produced by a body vibrating in sympathy with a neighboring source of sound or the increased amplitude of an a

lready vibrating object due to the vibrations of its neighbor.
Physics
1 answer:
Phoenix [80]4 years ago
5 0

Answer:

Resonance

Explanation:

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A metal sign for a car dealership is a thin, uniform right triangle with base length b and height h. the sign has mass m.
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(a) The moment of inertia of the sign for rotation about the side of length h is 1.24 kgm².

(b) The kinetic energy of the sign when it is rotating about an axis is 141.37 J.

<h3>Moment of inertia of the triangular sign</h3>

The moment of inertia of the sign for rotation about the side of length h is calculated as follows;

I = 2 x ¹/₃M(b/2)²

I = 2 x ¹/₃Mb² x ¹/₄

I = ¹/₆Mb²

I = ¹/₆ x 4.4 x 1.3²

I = 1.24 kgm²

<h3>Rotational kinetic energy of the ball</h3>

K.E(rot) = ¹/₂Iω²

where;

  • ω is angular speed = 2.4 rev/s = 2.4 x (2π rad)/s = 15.1 rad/s

K.E(rot) = ¹/₂(1.24)(15.1)²

K.E(rot) = 141.37 J

Learn more about rotational kinetic energy here: brainly.com/question/25803184

#SPJ1

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2 years ago
a=vf-vi/t is the equation for calculating the acceleration of an object. write out the relationship shown in the equation using
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Answer:

Acceleration is defined as the ratio between the change in velocity of an object and the time it takes for the object to change the velocity.

In formula, this is written as:

a=\frac{v_f -v_i}{t}

where

vf is the final velocity

vi is the initial velocity

t is the time it takes for the object to accelerate from u to v

Note that acceleration is a vector, so it can also be caused by a change in the direction of the velocity, not only by a change in its magnitude.

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