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2 years ago

What is simple machine?

Physics

1 answer:

PolarNik [594]2 years ago

8 0

Explanation:

Those tools that helps to make our work easier ,faster and more convenient in our daily life it is called simple Machine.

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where σ(t) and σ(0) represents the time-dependent and initial (i.e., time =0) stresses, respectively, and t and τ denote elapsed

lesya [120]

Answer:

$E_r(6)=4.35614\ MPa$

Explanation:

$\epsilon$ = Strain = 0.49

$\sigma _0$ = 3.1 MPa

At t = Time = 32 s $\sigma$ = 0.41 MPa

$\tau$ = Time-independent constant

Stress relation with time

$\sigma=\sigma _0exp\left(-\frac{t}{\tau}\right)$

at t = 32 s

$0.41=3.1exp\left(-\frac{32}{\tau}\right)\\\Rightarrow exp\left(-\frac{32}{\tau}\right)=\frac{0.41}{3}\\\Rightarrow -\frac{32}{\tau}=ln\frac{0.41}{3}\\\Rightarrow \tau=-\frac{32}{ln\frac{0.41}{3}}\\\Rightarrow \tau=16.0787\ s$

The time independent constant is 16.0787 s

$E_{r}(t)=\frac{\sigma(t)}{\epsilon_0}$

At t = 6

$\\\Rightarrow E_{r}(6)=\frac{\sigma(6)}{\epsilon_0}$

From the first equation

$\sigma(t)=\sigma _0exp\left(-\frac{t}{\tau}\right)\\\Rightarrow \sigma(6)=3.1exp\left(-\frac{6}{16.0787}\right)\\\Rightarrow \sigma(6)=2.13451$

$E_r(6)=\frac{2.13451}{0.49}\\\Rightarrow E_r(6)=4.35614\ MPa$

$E_r(6)=4.35614\ MPa$

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Is a glacier nothing more than a huge mineral flowing downhill?

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3 years ago

Una pelota recorre 20 m hacia la derecha y luego 10 m hacia la izquierda, todo en un lapso de tiempo de 10 s , cual es si veloci

zvonat [6]

Answer:

v = 1 i ^ m / s, v = 1 m / s

Explanation:

In this problem we show the difference between vectors and scalars.

The average speed is

v = Δx / Δt

The bold are vectors

Δx = 20-10 = 10 i^ m

v = 10/10

v = 1 i ^ m / s

the unit vector indicates that the velocity is on the x-axis

The average speed is

v =Δx / Δt

v = 10/10

v = 1 m / s

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3 years ago

What is simple machine?​

What is simple machine?