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DerKrebs [107]
3 years ago
9

Resueltas:

Physics
1 answer:
BabaBlast [244]3 years ago
7 0

Answer:

<em>El automovilista recorrió 92.315 metros</em>

Explanation:

<u>Movimiento Uniformemente Acelerado</u>

Ocurre cuando la rapidez de un móvil cambia en cantidades iguales en tiempos iguales. El cambio de velocidad por unidad de tiempo es llamado aceleración.

Siendo vo la rapidez inicial del móvil, vf su velocidad final, y t el tiempo que tarda en variar la velocidad, la aceleración se calcula con la fórmula:

\displaystyle a=\frac{v_f-v_o}{t}\qquad\qquad [1]

Por su parte, el móvil en su trayectoria recorre una distancia x dada por:

\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad\qquad [2]

Datos: El automovilista lleva inicialmente una rapidez vo=30.5 m/s y la disminuye uniformemente con una aceleración (de frenado) de a=-3\ m/s^2 hasta reducir a vf=19.4 m/s.

Despejando el tiempo de la ecuación [1] y substituyéndolo en la [2], obtenemos la relación:

V_f^2=V_o^2+2ax

De donde podemos calcular x:

\displaystyle x=\frac{V_f^2-V_o^2}{2a}

Reemplazando valores:

\displaystyle x=\frac{19.4^2-30.5^2}{2*(-3)}

\displaystyle x=\frac{-553.89}{-6}

x = 92.315 m

El automovilista recorrió 92.315 metros

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he deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is sudden
Lubov Fominskaja [6]

Answer:

Incomplete question

This is the complete question

The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 V potential difference is suddenly applied to the initially uncharged plates through a 1000 Ω resistor in series with the deflection plates. How long does it take for the potential difference between the deflection plates to reach 95 V?

Explanation:

Given that,

The dimension of 10cm by 2cm

0.1m by 0.02m

Then, the area is Lenght × breadth

Area=0.1×0.02=0.002m²

The distance between the plate is d=1mm=0.001m

Then,

The capacitance of a capacitor is given as

C=εoA/d

Where

εo is constant and has a value of

εo= 8.854 × 10−12 C²/Nm²

C= 8.854E-12×0.002/0.001

C=17.7×10^-12

C=17.7 pF

Value of resistor resistance is 1000ohms

Voltage applied is V = 100V

This Is a series resistor and capacitor (RC ) circuit

In an RC circuit, voltage is given as

Charging system

V=Vo[1 - exp(-t/RC)]

At, t=0, V=100V

Therefore, Vo=100V

We want to know the time, the voltage will deflect 95V.

Then applying our parameters

V=Vo[1 - exp(-t/RC)]

95=100[1-exp(-t/1000×17.7×10^-12)]

95/100=1-exp(-t/17.7×10^-9)

0.95=1-exp(-t/17.7×10^-9)

0.95 - 1 = -exp(-t/17.7×10^-9)

-0.05=-exp(-t/17.7×10^-9)

Divide both side by -1

0.05=exp(-t/17.7×10^-9)

Take In of both sides

In(0.05)=-t/17.7×10^-9

-2.996=-t/17.7×10^-9

-2.996×17.7×10^-9=-t

-t=-53.02×10^-9

Divide both side by -1

t= 53.02×10^-9s

t=53.02 ns

The time to deflect 95V is 53.02nanoseconds

5 0
3 years ago
The type of tectonic plate boundary that occurs when two plates are colliding into each other is known as a
ruslelena [56]
The answer is convergent boundary 
6 0
3 years ago
Read 2 more answers
Consider two sizes of disk, both of mass M. One size of disk has radius R; the other has radius 4R. System A consists of two of
Harman [31]

Answer:

4 smaller disks

Explanation:

We are given;

Mass of smaller and larger disks = M

Radius of smaller disk = R

Radius of larger disk = 4R

Formula for moment of inertia about cylinder axis is:

I = ½MR²

Thus;

For small disk, I_small = ½MR²

For large disk, I_large = ½M(2R)² = 2MR²

We are told that moment of inertia of System A consists of two of the larger disks. Thus;

I_A = 2 × I_large = 2 × 2MR²

I_A = 4MR²

We are also told that System B consists of one of the larger disks and a number of the smaller disks. Thus;

I_B = I_large + n(I_small)

Where n is the number of smaller disks.

I_B = 2MR² + n(½MR²)

I_B = MR²(2 + n/2)

We are told that the moment of inertia for system A equals the moment of inertia for system B. Thus;

I_A = I_B

So;

4MR² = MR²(2 + n/2)

MR² will cancel out to give;

4 = 2 + n/2

Multiply through by 2 to give;

8 = 4 + n

n = 8 - 4

n = 4

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What is an example of chemical potential energy in humans?
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A visitor is staying in a tent that is 11 kilometers west of the closest point on a shoreline to a coral reef. The coral reef is
Vaselesa [24]

Answer:

Explanation:

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All the visitor needs to do is run more than 7 kmph to reduce the days time. For example, running at 11 kmph takes him or her exactly 1 hour to reach the shore, before taking another swim of about an hour to reach the reef

4 0
3 years ago
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