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Reil [10]
3 years ago
14

What are the three parts of the power phase? *

Physics
1 answer:
brilliants [131]3 years ago
6 0

Answer:

body position

Mid-Pull

Glide

Explanation:

umm

this is so simple

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A point source emits 50.0 W of sound isotropically. A small microphone intercepts the sound in an area of 0.30 cm", 85 m from th
viva [34]

Answer:

a)  I = 5,507 10⁻⁴ W / m² , b)    P = 1.65 10⁻⁸ W / m² , c)  R = 4.06 m,   I = 1,259 10⁻⁶ W / m²

Explanation:

A) the intensity is defined as the power per unit area

         I = P / A

The intensity for the radius of the sphere of 85 m is

         A = 4π R²

         A = 4π 85²

         A = 9,079 10⁴ m²

The intensity at this point is

           I = 50.0 / 9.079 10⁴

           I = 5,507 10⁻⁴ W / m²

           

b) The power collected by the microphone

     We reduce the area to the SI system

         a = 0.30 cm² (1 m / 10² cm)² = 0.3 10⁻⁴ m²

         

          P = I A

          P = 5,507 10-4 0.30 10-4

          P = 1.65 10⁻⁸ W / m²

c) Let's reduce dβ

      β = 10 log (I / I₀)

      β = 10 log (5,507 10⁻⁴ / 1 10⁻¹²)

      β = 59 dB

d) if the gain is 3 dB, the total intensity is

     β = 59 + 3

     β = 61 dB

We look for the intensity

       I = I₀ 10  β / 10

        I = 1 10⁻¹² 10 (61/10)

        I = 1,259 10⁻⁶ W / m²

Use

          A₁ I₁ = A₂ I₂

          A = 4pi R2

    We replace

          R₁² I₁ = R₂² I₂

          R₂ = R₁ √ I₁ / I₂

           R = 85 RA (1,259 10⁻⁶ / 5,507 10⁻⁴)

          R = 4.06 m

3 0
3 years ago
Why would two poles of different magnets repel one another?
docker41 [41]
Because the poles have like poles and like poles reple each other
5 0
3 years ago
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The resultant force acting on an object of mass 5.0kg varies with time as shown. the object is initially at rest.
il63 [147K]
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8 0
3 years ago
A bicyclist starts at point P and travels around a triangular path that takes her through points Q and R before returning to the
REY [17]

Answer:

Displacement by cyclist is zero.

Explanation:

In the given question bicyclist is travelling in a rectangular track having P , Q and R edges.

The bicyclist starts from P and travel through Q and R and returned to P again.

We need to find its displacement.

We know displacement  of a body is its difference between its initial position to final position.

Here in the given question the bicyclist returns to P again.

Therefore, total displacement by bicyclist is zero.

Hence, this is the required solution.

4 0
3 years ago
What is force derived from
Nata [24]

Answer:

Force can also be described intuitively as a push or a pull. ... It is measured in the SI unit of newtons and represented by the symbol F. The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time.

Explanation:

hope this helps : )

6 0
3 years ago
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