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Redo Problem 13.19, assuming that a surcharge pressure of 11 kN/m2 is applied on top of the backfill.
Problem 13.19
A 5-m-high retaining wall with a vertical back face retains a homogeneous saturated soft clay. The saturated unit weight of the clay is 21 kN/m3. Laboratory tests showed that the undrained shear strength, cu, of the clay is 17 kN/m2.
a. Make the necessary calculation and draw the variation of Rankine's active pressure on the wall with depth.
b. Find the depth up to which tensile crack can occur.
c. Determine the total active force per unit length of the wall before the tensile crack occurs.
d. Determine the total active force per unit length of the wall after the tensile crack occurs. Also, find the location of the resultant.
For the amplifier in Fig. P4.20, the maximum value of VS is 2 V and the op-amp can deliver no more than 100 mA. (a) If +-10 V supplies are used, what is the maximum allowable value of R2 (b) Repeat for +-3 V supplies.
Determine which of these properties hold and which do not hold for each of the following continuous-time systems.Justify your answer. In each example,y(t) denotes the system output and x(t) is the system input. (a) y(t)= x(t-2)+x(2-t) (b) y(t)= (c..
The preceding example demonstrated the required amplitude response of the VSB filter. We now consider the phase response.
How would you orient a loop antenna in order to obtain maximum signal from an incident electromagnetic wave which has its magnetic field linearly polarized in the north-south direction?
Discuss the distinctive roles of unlabeled and labeled examples in designing the hidden and output layers of this network.
The Y-Connected synchronous motor whos nameplate is shown in Figure 1 has a per-unit synchronous reactance of 0.9 and a per-unit resistance of 0.02. a.) What is the rated input power of this motor
In light of the winner's curse, must winning bidders in auctions necessarily "lose" in the sense of paying more than the item is worth? What steps can bidders take to prosper in auctions?
Find the node voltage phasors VA and VB.- If the circuit is operating with ω = 10 krad/s, use Multisim to verify your answer in (a).
It is required to design a peak rectifier dc power supply(i.e. one that uses a filter capactor) that provides an average dcoutput voltage of 15V on which a maximum of ±1V ripple isallowed. The rectifier feeds a load of 150Ω.
If the SCR of Fig. 13-41 has a gate trigger voltage of 1.5 V, a gate trigger current of 15 mA, and a holding current of 10 mA, what is the input voltage that triggers the SCR? The supply voltage that resets the SCR?
Many automobiles are equipped with windshield wipers that can operate intermittently during a light rainfall. How does the operation ofsuch wipers depend on the charging and discharging of a capacitor
Assume A is the MSB and B is the LSB. The circuit produces an output of 1 if and only if the sum of the current 2-bit input and the previous 2-bit input is equal to 6. Design the circuit using as few D flip flops as possible. Draw the state diagra..
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