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Work done to move the tank at a distance of 5 m if the it is fully filled with the
liquid.
The boom in the figure supports a load W = 1400 lb. Compute the forces in the cables AE and BD and also the components exerted by the ball and socket joint C.
Answers: AE = 512 lb; BD = 878 lb; CX = -250 lb; CY = 600 lb; CZ = 800 lb
A vertical load P = 800 lb applied to the tripod shown in the figure, causes a compressive force of
256 lb in leg AB and a compressive force of 283 lb in leg AC. Determine the force in leg AD and
the coordinates xD and zD of its lower D.
Answers: AD = 433 lb; xD = 4ft; zD = 1 ft
name atleast 5 construction activities in a built environment. classify these activities. how do these activities contribute to the society's well-being?
Think 5 ways in (flood defenses,drainage, and transport network) which it impacts on your daily life.
1. Name atleast two major environmental problems we are facing in our country as of present. As a future engineer, what are the possible recommendations you cn provide to mitigate these problems?
2. list atleast 3 aspects of natural world that environmental engineers should work to care for or restore, then provide a brief description and discussion for each aspect.
discuss the functions of civil engineering, environmental engineering nd environmental science. and give their relation to each other.
Write atleast 5 different infrastrustures under the domain of the following specialization of Civil Engineering.
*structural engineering
*water resource engineering
*transportation engineering
1.1 Use calculus to solve Eq. (1.9) for the case where the initial
velocity, v(0) is nonzero.
1.2 Repeat Example 1.2. Compute the velocity to t = 10 s, with a
step size of (a) 1 and (b) 0.5 s. Can you make any statement regarding
the errors of the calculation based on the results?
1.3 Rather than the linear relationship of Eq. (1.7), you might
choose to model the upward force on the parachutist as a secondorder
relationship,
FU = −c
v2
a) Find multiplier values 𝑛1 and 𝑛2 in a indirect WBFM generator (the Armstrong method)
using two step multiplier where the message signal 𝑚(𝑡) has bandwidth 500 Hz and
narrowband modulator has a modulation index 0.2 and carrier frequency 120 KHz.
The output frequency is to be 120 MHz with the modulation index of 720.
b) The output WBFM signal in (a) can also be generated by a variant of the Armstrong
method, as shown below, where carrier frequency of 𝑣3(𝑡) is lowered by amount of 𝜔2.
In other words, two multipliers are separated by mixer. Find multiplier values 𝑚1 and 𝑚2
with 𝜔1 = 100 𝑘𝐻𝑧 and 𝜔2 = 4 𝑀𝐻𝑧 .(Note: Here two BPFs that follow the frequency
multiplier are not shown)
c) Comment your results. Which generator is more practical? Justify your conclusion.
