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mamaluj [8]
2 years ago
11

U= (-5,3) find the magnitude of u. please help me

Physics
1 answer:
Fantom [35]2 years ago
3 0

u = 5.83

Explanation:

The magnitude of a vector \vec{u} is

|\vec{u}| = \sqrt{u_z^2 + u_y^2} = \sqrt{(-5)^2 + (3)^2}

\:\:\:\:\:\:\:= \sqrt{34} = 5.83

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A larger impulse. A 1-kg ball has twice as much speed as a 10-kg ball.

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2 years ago
Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number o
lys-0071 [83]

Answer:

0.99 m

Explanation:

Parameters given:

Amplitude, A = 7.00cm

Wave number, k = 3.00m^-1

Angular Frequency, ω = 2.50Hz

Period = 6.00 s

Phase, ϕ = π/12 rad

Note: All parameters are the same for both waves except the phase.

Wave 1 has a wave function:

y1(x, t) = Asin(kx - ωt)

y1(x, t) = 7sin(3x - 2.5t)

Wave 2 has a wave function:

y2(x, t) = Asin(kx - ωt + ϕ)

y2(x, t) = 7sin(3x - 2.5t + π/12)

π is in radians.

When Superposition occurs, the new wave is represented by:

y(x, t) = 7sin(3x - 2.5t) + 7sin(3x - 2.5t + π/12)

y(x, t) = 7[sin(3x - 2.5t) + sin(3x - 2.5t + π/12)]

Using trigonometric function:

sin(a) + sin(b) = 2cos[(a - b)/2]sin[(a + b)/2]

Where a = 3x - 2.5t, b = 3x - 2.5t + π/12

We have that:

y(x, t) = (2*7)[cos(π/24)sin(3x - 2.5t + π/24)]

Therefore, when x = 0.53cm and t = 2s,

y(x, t) = (2*7)[cos(π/24)sin{(3*0.53) - (2.5*2)+ π/24}]

y(x, t) = 14 * 0.9914 * 0.0713

y(x, t) = 0.99 m

The height of the resultant wave is 0.99cm

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2 years ago
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Energy transfer the energy from the tuning fork is being transferred to the guitar<span />
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If a sled has at the top of 10 m hill had 1000 J of potential energy what would happen to the PE if the sled were to moved to a
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Answer:

500J

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there are a wats group where you can get your answer by trusted experts.

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2 years ago
A certain plucked string produces a fundamental frequency of 150 hz. Which frequency is not one of the harmonics produced by tha
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Answer:

Some of the frequency that cannot be produced by the string includes 400Hz, 500Hz 650Hz etc...

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3 years ago
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