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2 years ago

Example 9.1

Physics

1 answer:

docker41 [41]2 years ago

6 0

v1f = -0.16 ms

Explanation:

Use the conservation law of linear momentum:

m1v1i + m2v2i = m1v1f + m2v2f

where

v1i = v2i = 0

m1 = 160 kg

m2 = 0.50 kg

v2f = 50m/s

v1f = ?

So we have

0 = (160 kg)v1f + (0.5 kg)(50 m/s)

v1f = -(25 kg-m/s)/(160 kg)

= -0.16 m/s

Note: the negative sign means that its direction is opposite that of the arrow.

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If the temperature of an iron sphere is increased A)its density will decrease .B)its volume will decrease. C)its mass will decre

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Answer:

A) Its density will decrease

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2 years ago

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It is known that the kinetics of recrystallization for some alloy obeys the Avrami equation, andthat the value of n in the expon

trapecia [35]

Answer: $8.76\times 10^{-3} min^{-1}$

Explanation:

Given

n=5

0.3 fraction recrystallize after 100 min

According to Avrami equation

$y=1-e^{-kt^n}$

where y=fraction Transformed

k=constant

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$0.3=1-e^{-k(100)^5}$

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$0.5=e^{-kt^n}$

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taking log both sides

$\ln 0.5=-3.566\times 10^{-11}\cdot (t)^5$

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2 years ago

A 6.0 kg mass is placed on a 20º incline which has a coefficient of friction of 0.15. What is the acceleration of the mass down

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Answer:

Explanation:

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KengaRu [80]

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