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3 years ago

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Three identical point charges ( 2.0 nc are placed at the corners of an equilateral triangle with sides of 2.0-m length. if the e

lectric potential is taken to be zero at infinity, what is the potential (in v at the midpoint of any one of the sides of the triangle?

1 answer:

WARRIOR [948]3 years ago

3 0

Try the distance formula if you have the coordinates of the triangle (point to point) make sure they are congruent

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Chris threw a basketball a distance of 27.5 m to score and win his

salantis [7]

Answer:

v₀ = 16.55 m/s

Explanation:

This motion of the ball can be modeled as a projectile motion with following data:

R = Range of Projectile = 27.5 m

θ = Launch Angle = 50°

g = acceleration due to gravity = 9.81 m/s²

v₀ = Initial Speed of Ball = ?

Therefore, using formula for range of projectile, we have:

$R = \frac{v_{0}^2\ Sin2\theta}{g}\\\\v_{0}^2 = \frac{Rg}{Sin2\theta}\\\\v_{0}^2 = \frac{(27.5\ m)(9.81\ m/s^2)}{Sin100^o}\\\\v_{0} = \sqrt{273.93\ m^2/s^2}$

<u>v₀ = 16.55 m/s</u>

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3 years ago

Write the word equation, balanced symbol equations and ionic equation got magnesium carbonate

Finger [1]

Explanation:

Mg-2+C+4>Mg2C.

Here you divide the four by the two and transfer the two toMg. In reactions like this oxidation numbers are exchanged.

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3 years ago

A Ferris wheel has radius 5.0 m and makes one revolution every 8.0 s with uniform rotation. A person who normally weighs 670 N i

DaniilM [7]

Answer:

The apparent weight of the person as she pass the highest point is $N = 458.8 \ N$

Explanation:

From the question we are told that

The radius of the Ferris wheel is $r = 5.0 \ m$

The period of revolution is $T = 8.0 \ s$

The weight of the person is $W = 670 \ N$

Generally the speed of the wheel is mathematically represented as

$v = \frac{2 \pi r}{T }$

substituting values

$v = \frac{2 * 3.142 * 5}{8 }$

$v = 3.9 3 \ m/s$

The apparent weight (the normal force exerted on her by the bench) at the highest point is mathematically evaluated as

$N = mg - \frac{mv^2}{r}$

Where m is the mass of the person which is mathematically evaluated as

$m = \frac{W}{g}$

substituting values

$m = \frac{670}{9.8}$

$m = 68.37 \ kg$

So

$N = 68.37 * 9.8 - \frac{68.37 * {3.93}^2}{5}$

$N = 458.8 \ N$

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3 years ago

Controlled variables

PilotLPTM [1.2K]

Answer:

A control variable in scientific experimentation is an experimental element which is constant and unchanged throughout the course of the investigation.

Explanation:

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3 years ago

A microphone is attaced to a spring that is suspended from

kirill115 [55]

To solve this problem we will apply the concept related to the amplitude and the Doppler effect. The difference between the maximum and minimum frequency detected by the microphone would be given by the mathematical function

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Here,

$f_s$ = Source Frequency

$v_0$ = Speed of microphone

v = Speed sound

$f_{max} - f_{min} = 2 f_s (\frac{v_0}{v})$

Maximum speed of the microphone is

$v_0 = f_{max} - f_{min} * \frac{v}{2f_s}$

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Here T means the Period, then

$A= \frac{0.8185 * 2.0}{2\pi}$

A= 0.2605m

Therefore the amplitude of the simple harmonic motion is 0.2605m

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4 years ago