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grigory [225]
3 years ago
14

The closeness of measured values to an accepted value is the BLANK of the data ?

Physics
1 answer:
wlad13 [49]3 years ago
3 0
When you refer to how close a measured value is to a standard, accepted or known value, you are talking about the ACCURACY of the data. This is the definition of accuracy when it comes to engineering and other fields of science. 

Accuracy is usually associated or with the term precision, as their definitions are often interchanged.
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If the baseball is touching the bat it should be A

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3 years ago
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Una caja con medicina es lanzada desde un avión localizado a una distancia vertical de 340 m por encima de un río. Si el avión l
a_sh-v [17]

Answer:

La distancia horizontal que recorrerá la caja con medicina antes de caer al río es 583.1 metros.

Explanation:

Una caja con medicina es lanzada desde un avión localizado a una distancia vertical de 340 m por encima de un río.  Este movimiento posee una composición en dos dimensiones: uno horizontal sin aceleración, y el otro vertical con aceleración constante debido a la gravedad.  Por lo que se trata de un movimiento rectilíneo uniforme (MRU) en su trayectoria horizontal o eje horizontal (es decir, su velocidad es constante) y un movimiento uniformemente variado (MRUV) en su trayectoria vertical o en el eje vertical (es decir, su aceleración es constante).

En este caso, son conocidos los datos, considerando el sistema de referencia de la imagen:

  • Vy = 0 m/s (trayectoria vertical)
  • Vx = 70m/s (velocidad horizontal)  
  • hi = 340 m (altura inicial)
  • g = -9,8 m/s²
  • hf = 0 m (altura final. Cuando la caja de medicina cae al río, su altura será 0 m)

En el caso del MRUV, la posición puede calcularse mediante la expresión:

Posición final= Posición inicial + Velocidad inicial*t + \frac{1}{2}*a*t²

donde a es la aceleración y t el tiempo transcurrido.

En este caso, reemplazando los datos conocidos, teniendo en cuenta que el MRUV sucede en la trayectoria vertical y que la aceleración es el valor de la gravedad:

0 m= 340 m + 0 m/s*t + \frac{1}{2}* (-9.8 m/s²)* t²

Resolviendo:

-340 m= \frac{1}{2}* (-9.8 m/s²)* t²

\frac{-340 m}{\frac{1}{2} *(9.8\frac{m}{s^{2} } )} =t^{2}

69.39 s²= t²

t= √69.39 s²

t= 8.33 s

La posición en MRU se obtiene mediante:

Posición final= Posición inicial + velocidad* tiempo

Con los datos conocidos y el tiempo calculado previamente, es posible calcular la distancia horizontal que recorrerá la caja con medicina antes de caer al río, siendo la posición inicial en x igual a cero:

Posición final= 0 m + 70m/s* 8.33 s

Posición final= 583.1 m

<u><em>La distancia horizontal que recorrerá la caja con medicina antes de caer al río es 583.1 metros.</em></u>

4 0
3 years ago
The physical quantity represented as rate of change of change in position in a
Oduvanchick [21]

Answer:

B

rate of change of its position with respect to a frame of reference, and is a function of time.

3 0
3 years ago
A balloon is rubbed on someone's hair, then placed next to a stream of water. The balloon has an overall negative charge. The wa
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Answer:

If I'm right it bends away

Explanation:

I learned this in class before it was fun to me

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A young woman named kathy kool buys a sports car that can accelerate at the rate of 5.37 m/s 2 . she decides to test the car by
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As the stan moves 0.94 s before with an acceleration 4.12 m/s^2

so the distance moved by it

d = \frac{1}{2}at^2[tex]d = \frac{1}{2}*4.12*0.94^2

d = 1.82 m

speed gained by the car is given as

v = v_i + at

v = 4.12* 0.94 = 3.873 m/s

now the relative speed of them is given as

v_r = 3.873 - 0 = 3.873 m/s

relative acceleration is given as

a_r = 4.12 - 5.37 = -1.25

now the distance between them is to be covered

d = v_r * t + \frac{1}{2}a_r * t^2

1.82 = -3.873* t + \frac{1}{2}*1.25 * t^2

by solving above equation we have

t = 6.64 s

so it will overtake after 6.64 s

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