2 years ago

For each of the following systems and time intervals, select the appropriate version of

1 answer:

4 0

The heating coils in you toaster during the first five seconds after you turn the toaster on is Δ K = W + Q.

Your automobile just before you fill it with gas until you pull away from the gas station at speed v is ΔK + ΔU + ΔEint = W + Q + TMW + TMT

your body while you sit quietly and eat a peanut butter and jelly sandwich for lunch is ΔEint = Q + TET + TER
 

your home during five minutes of a sunny afternoon while the temperature in the home remains fixed is ΔU = W + Q + TMW + TMT

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Part a)

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P1 = 20 bar

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Part b)

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$W = \int \frac{c}{V^{1.35}}dV$

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Answer:

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Explanation:

The severity index is defined by :

$S=a^{5/2}t$

a is dimensionless constant that equals the number of multiples of g

Conditions are given as :

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We can find t from the above data as follows :

$t=\dfrac{v-u}{a}\\\\t=\dfrac{4.56-0}{34}\\\\t=0.134\ s$

As a is the acceleration that is multiple of g.

So,

$a=\dfrac{34}{9.8}=3.46$

So,

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$S=a^{5/2}t\\\\S=(3.46)^{5/2}\times 0.134\\\\S=2.98\ s$

Hence, the severity index for the collision is 2.98 seconds.

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