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zepelin [54]
3 years ago
6

Solve the inequality 21 - z < 19

Mathematics
1 answer:
NISA [10]3 years ago
8 0


You need to isolate z, so first subtract 21 from both sides so you have:

-z<-2

Multiply both sides by -1 so z is positive (when a negative number is multiplied or divided in an inequality, the < or > sign flips):

z>2

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Una caja de 25 newtons se suspende mediante un cable con diámetro de 2cm¿cuál es el esfuerzo aplicado al cable?
Naddik [55]

El cable experimenta un esfuerzo axial de 79577.472 pascales por el peso de la caja.

<h3>¿Cómo calcular el esfuerzo aplicado sobre el cable?</h3>

La caja tiene masa y está sometida a un campo gravitacional, por tanto, tiene un peso (W), en newtons. Por el principio de acción y reacción (tercera ley de Newton), encontramos que el cable es tensionado debido a ese peso y su área transversal experimenta un esfuerzo axial (σ), en pascales.

Asumiendo una distribución uniforme de la fuerza sobre toda la superficie transversal de la cuerda, tenemos que el esfuerzo axial se calcula mediante la siguiente expresión:

σ = W / (π · D² / 4)

Donde:

  • W - Peso de la caja, en newtons.
  • D - Diámetro del área transversal de la caja, en metros.

Si sabemos que W = 25 N y D = 0.02 m, entonces el esfuerzo axial aplicado a la cuerda es:

σ = 25 N / [π · (0.02 m)² / 4]

σ ≈ 79577.472 Pa

<h3>Observación</h3>

La falta de problemas verificados en español sobre esfuerzos axiales obliga a buscar uno equivalente en inglés.

Para aprender más sobre esfuerzos axiales: brainly.com/question/13683145

#SPJ1

5 0
1 year ago
Please help really fast it’s timed!!! Can someone explain
kolezko [41]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
Put these fractions in order from least to greatest. <br><br>2/3<br>6/8<br>1/5​
Julli [10]

Answer:

2/3 1/5 6/8

Step-by-step explanation:

3 0
3 years ago
Amy needs to fill a tank that has a capacity of 112L. She using a bucket to collect water from the tap. The bucket can hold 7L o
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Answer:

8 trips

Step-by-step explanation: divided 112 by 2 then I got 56 which I then divided that by seven which gave me the answer of 8

5 0
3 years ago
Shay created the table below to graph the equation r-3-sin theta (rounded to the hundredths place). Analyze the table. Did Shay
monitta

Answer:

B is false

Step-by-step explanation:

Let's check Shay's table:

  • if \theta=0, then r=3-\sin 0=3-0=3 (true);
  • if \theta =\dfrac{\pi}{6}, then r=3-\sin \dfrac{\pi}{6}=3-\dfrac{1}{2}=2.5 (true);
  • if \theta = \dfrac{\pi}{4}, then r=3-\sin \dfrac{\pi}{4}=3-\dfrac{\sqrt{2}}{2}\approx2.29 (true);
  • if \theta=\dfrac{\pi}{3}, then r=3-\sin \dfrac{\pi}{3}=3-\dfrac{\sqrt{3}}{2}\approx 2.13 (false);
  • if \theta =\dfrac{\pi}{2}, then r=3-\sin \dfrac{\pi}{2}=3-1=2 (true).
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4 years ago
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