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Dmitriy789 [7]
3 years ago
15

When a football is kicked, the action and reaction forces do NOT cancel each other out because

Physics
1 answer:
AfilCa [17]3 years ago
6 0

Answer:

C

Explanation:

The kicker exerts more force of the football which is why the football moves when its kicked.

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What is polarization?
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if your glasses are polarized, you can see the fish in the water. also im pretty sure its d

Explanation:

5 0
3 years ago
The intensity of a sound wave at a fixed distance from a speaker vibrating at 1.00 kHz is 0.750 W/m2. (a) Determine the intensit
sveticcg [70]

Answer:

a)   I = 3.63 W / m² , b)   I = 0.750 W / m²

Explanation:

The intensity of a sound wave is given by the relation

         I = P / A = ½ ρ v (2π f s_{max})²

         I = (½ ρ v 4π² s_{max}²) f²

a) with the initial condition let's call the intensity Io

        cte = (½ ρ v 4π² s_{max}²)

         I₀ = cte s² f₀²

        I₀ = cte 10 6

If frequency is increase f = 2.20 10³ Hz

         I = constant (2.20 10³) 2

         I = cte 4.84 10⁶

let's find the relationship of the two quantities

        I / Io = 4.84

        I = 4.84 Io

        I = 4.84 0.750

        I = 3.63 W / m²

b) in this case the frequency is reduced to f = 0.250 10³ Hz and the displacement s = 4 s or

        I = cte (f s)²

        I = constant (0.250 10³ 4)²

 

        I = cte 1 10⁶

         

the relationship

        I / Io = 1

        I = Io

        I = 0.750 W / m²

6 0
2 years ago
The measure of how much salt will dissolve into 100g of water is _______________ .
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The measure of how much salt will dissolve into 100g of water is _solution_ .
8 0
3 years ago
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A negative point charge - is at the center of a hollow insulating spherical shell, which has an inner radius R1 and an outer rad
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The Explanation is Below

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A tennis player strikes a tennis ball from underneath with her racket. The ball is sent straight up with an initial velocity of
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So the acceleration of gravity is 9.8 m/s so that’s how quickly it will accelerate downwards. You can use a kinematic equation to determine your answer. We know that initial velocity was 19 m/s, final velocity must be 0 m/s because it’s at the very top, and the acceleration is -9.8 m/s. You can then use this equation:

Vf^2=Vo^2+2ax

Plugging in values:

361=19.6x

X=18 m
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