State 3 advantages and 3 disadvantages of unit rate contract

1. You are asked to write a report about one of the structures that Transportation Engineers

aksik [14]

Answer:

ddition, please state if transportation engineers are involved with any other ... Please specify their specific roles and contributions in the execution of the ...

8 0

2 years ago

Which engineers are requried to have a PE (professional engineer) license?

Elena-2011 [213]

Professional engineers need to complete a four year college degree, work under a Professional Engineer for four years, pass two intensive competency exams, and earn a license from their state’s licensure board.

7 0

2 years ago

Read 2 more answers

Engine horsepower decreases ________% for every___________feet above sea level.

Nitella [24]

Answer:

Engine horsepower decreases <u>3.5%</u> for every <u>1,000</u> feet above sea level.

4 0

2 years ago

the voltage across a 5mH inductor is 5[1-exp(-0.5t)]V. Calculate the current through the inductor and the energy stored in the i

Serggg [28]

Given Information:

Inductance = L = 5 mH = 0.005 H

Time = t = 2 seconds

Required Information:

Current at t = 2 seconds = i(t) = ?

Energy at t = 2 seconds = W = ?

Answer:

Current at t = 2 seconds = i(t) = 735.75 A

Energy at t = 2 seconds = W = 1353.32 J

Explanation:

The voltage across an inductor is given as

$V(t) = 5(1-e^{-0.5t})$

The current flowing through the inductor is given by

$i(t) = \frac{1}{L} \int_0^t \mathrm{V(t)}\,\mathrm{d}t \,+ i(0)$

Where L is the inductance and i(0) is the initial current in the inductor which we will assume to be zero since it is not given.

$i(t) = \frac{1}{0.005} \int_0^t \mathrm{5(1-e^{-0.5t}}) \,\mathrm{d}t \,+ 0\\\\i(t) = 200 \int_0^t \mathrm{5(1-e^{-0.5t}}) \,\mathrm{d}t \\\\i(t) = 200 \: [ {5\: (t + \frac{e^{-0.5t}}{0.5})]_0^t \\i(t) = 200\times5\: \: [ { (t + 2e^{-0.5t} + 2 )] \\$