Question

2.
An embankment of width 10m and side slope 1 1/2 : 1 is required to
be made on a ground which is level in a direction traverse to
centre line. The central height at 20 m intervals are as follows:
0.8, 1.2, 2.25, 2.6, 1.9, 1.4 and 0.9. Calculate the volume of
earth work according to prismoidal formula.

Answer #1

The centre line of a proposed road of formation width 12.00 m is
to fall at a slope of 1 in 100 from chainage 50m to chainage 150 m.
The existing ground levels on the centre line at chainages 50 m,
100 m and 150 m are 71.62 m, 72.34 m and 69.31 m respectively and
the ground slopes at 1 in 3 at right angles to the proposed centre
line. If the centre line formation level at chainage 50...

Part A: A plastic lens is made with material with index of
refraction n=1.4. If the front lens is ground to a radius of 1.3 m
and the rear lens ground to a radius of -0.9 m, what is the
refractive power of the lens? Answer: 0.75
diopters
Part B: A plastic lens is made with material with index of
refraction n=1.4. If the front lens is ground to a radius of 1.3 m
and the rear lens ground to...

A concrete, trapezoidal channel with a 5-m bottom width and side
slopes of 1:1 (H:V) discharges 35 m3/sec. The bottom slope of the
channel is 0.004. A dam is placed across the channel and raises the
water level to a depth of 3.4 m. determine the channel and flow
classification (e.g., M-2, S-1) upstream of the dam and explain
your supporting logic. then compute the water surface profile at
50-m intervals until you reach the hydraulic jump. Use a
spreadsheet...

Lesson 12.B
1.Over what interval does 3 cos(2?) have the greatest positive
rate of change?
a) [0.8, 1.0]
b) [1.2, 1.4]
c) [2.2, 2.4]
d) [2.8, 3.0]
2. Let ?(?) = 2 cos(?) and ?(?) = cos(2?). Consider the average
rate of change of these functions over intervals of length 0.1.
•
Define ?? to be the maximum such rate of change for the function
? for 0 ≤ ? ≤ 2?. •
Define ?? to be the maximum such...

1) If a person holds 50 kg object at a height of 2 m above the
floor for 10 s. How much work is done? W = F×d
(2) The work done in lifting 30kg of bricks to a height of 20m
is W = m ×g × d (Formula, W = F × d but Force = m × g)
(3) A total of 4900 J is used to lift a 50-kg mass. The mass is
raised to a...

For full credit be sure to show all work and units.
1. A 20 foot ladder leans against a vertical wall. The bottom of
the ladder slides away from the wall at 2 ft/sec.
a. How fast is the top of the ladder sliding down the wall when
the top of the ladder is 12 feet from the ground?
b. Interpret the meaning of the sign.
2. The current speed record for weight loss is 487 pounds to 130
pounds...

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