Question Solved1 Answer You are on a boat on the south side of a river that is flowing due east at 3 m/s. You are trying to reach a point across the river that is due north. Explain how you can adjust the direction of a boat so that it travels straight across the river. In order for this to happen what must the horizontal component of the boat velocity be? Are there any restrictions on the speed of the boat compared with the speed of the river? Explain.

A uniformly charged cylindrical shell with no end caps has total charge Q , radius R, and length h. Determine the electric potential at a point a distance d from the right end of the cylinder as shown. -h -dRFigure P24.51

Problem 4a: Write a recursive C++ program to solve the following problem : P(1) = 3 P(2) = 4 P(n) =P(n-1)+P(n-2) for n>2 To test – output for P(4)=11 P(6) = 29 and P(7) =47 Hint: main shall call a function int par(int n) that returns 3 if n=1, it returns 4 if n = 2, and it returns par(n-1) + par(n-2) if n>2. Sample Output (Your name will replace mine & yours will be P(5)) John shows P( 7) has 47 units b: Draw a call tree for P(5). This should look similar to Figure 2.30 in the textbook. Note: the numbers just above the ovals are the return values. You may hand draw and scan, but you can complete in Google Suites or an App of your choice.

(50%) Proble 1: Standing at the base of one of the cliffs of Mt Arapiles in Victoria, Australia, a hiker hears a rock break loose from a height of 105 m. He can't see the rock right away but then does, 1 2 s later 50% Part (a) How far above the ground in meters is the rock when the hiker starts to see it? Neglect the time for the sound to reach the E Grade (50%) Proble 1: Standing at the base of one of the cliffs of Mt Arapiles in Victoria, Australia, a hiker hears a rock break loose from a height of 105 m. He can't see the rock right away but then does, 1 2 s later 50% Part (a) How far above the ground in meters is the rock when the hiker starts to see it? Neglect the time for the sound to reach the E Grade Summar Deductions Potential 1 ino cotan) asin ac Submbsion Atmempts remainin Glo per anempt) atar detailed vien cosho tanh() Degrees Radians l -1. Cotanho.」 Submit Hnt Mintsdeduction per ht Hints remaig Feedback: iu deduction per feedback. How much time in seconds after he notices the alling rock dees he have to move before the rock hits h35 head? Ignore the 0% Part 5 height of the hiker

Q. 1. Accuracy of Dual slope ADC is not affected by the precision of: A) Integrator capacitor value. B) Input Integrating time. C) Total conversion time. D) Reference voltage value. E) \( \mathrm{A} \) and \( \mathrm{D} \). Q2 Silicon has a band gap of \( 1.1 \mathrm{eV} \). Find number of needed photons at the maximum wavelength to have \( 5 \mathrm{~J} \) Q. 1. Accuracy of Dual slope ADC is not affected by the precision of: A) Integrator capacitor value. B) Input Integrating time. C) Total conversion time. D) Reference voltage value. E) \( \mathrm{A} \) and \( \mathrm{D} \). Q2 Silicon has a band gap of \( 1.1 \mathrm{eV} \). Find number of needed photons at the maximum wavelength to have \( 5 \mathrm{~J} \) of energy. Note that \( 1 \mathrm{ev}=1.6 \times 10^{-19} \mathrm{~J} \), Planck's constant \( h=6.63 \times 10^{-34} \mathrm{~J} \).s, speed of light \( c=3 \times 10^{5} \mathrm{~m} / \mathrm{s} \). Number of photons is: A) \( 19.05 \times 10^{18} \) B) \( 8.98 \times 10^{18} \) C) \( 6.524 \times 10^{18} \) D) \( 15.801 \times 10^{\mathrm{tk}} \) E) \( 28.41 \times 10^{18} \) Q3 For the Maxwell bridge shown in Figure Q3, balance is achieved when \( R 1=5 \mathrm{~K} \Omega \). The resister R4, is equal to: A) \( 600 \Omega \) B) \( 2000 \Omega \) C) \( 100 \Omega \) D) \( 300 \Omega \) E) \( 400 \Omega \) Q4 For Q3, what is true of the following about balancing this circuit: A) Adjusting R1 affects inductive balance directly. B) Balance will be reached after a few adjustments. C) There will have balance convergence problems. D) The circuit has impractical large value of \( \mathrm{R} 1 \). E) \( \mathrm{A} \) and \( \mathrm{B} \). Q5 An electronic ac voltmeter that uses amplification before rectification must have: A) High open loop gain. B) Large amount of negative feedback. C) Zero drift characteristics D) B and C E) \( \mathrm{B} \) and \( \mathrm{A} \) Q6 The sawtooth waveform signal shown in Figure Q6 is used to calibrate an average responding ac voltmeter. Find the error in the meter indication when used to measure the rms value of a square wave: A) \( 14.9 \% \) B) \( 13.4 \% \) C) \( 7.75 \% \) D) \( 3.875 \% \) E) \( 15.5 \% \) Figure Q6 Q7 In the half wave rectifier shown in of \( 10 \Omega \) and are assumed to have an infinite \( Q 7, D 1 \) and \( D 2 \) have an average forward resistance value of Rs (in \( \Omega \) ) for \( 10 \mathrm{~V} \) rms ac range: A) 1211 B) 1473 C) 2288 D) 2957 E) 2091 F) None Q8. A photoconductive cell that has a resistance changes from \( 2.5 \mathrm{k} \) to \( 1 \mathrm{k} \) when exposed to light is used in the circuit of Fig.4. If the device time constant is \( \tau=100 \mathrm{~ms} \), then the value of \( \mathrm{V}_{\text {aut }} \) after 2 ms from exposing the cell to light will be : A) \( 85.2 \mathrm{mV} \) B) \( 111 \mathrm{mV} \) C) \( 76.9 \mathrm{mV} \) D) \( 162 \mathrm{mV} \) E) \( 190 \mathrm{mV} \) F) None Q. 9. The ADC of data acquisition systems is typically of the type: A) Resistive ladder network. B) Successive approximation. C) Dual slope. D) Ramp. E) \( \mathrm{D} \) and \( \mathrm{A} \).

A box weighing 100 N made of Copper is pushed on a horizontal surface made of steel. Using the information given in the Table shown bellow, the minimum force needed to start the box skidding on this surface is Coefficients of Friction a) 36 N c) 53 N e) +5 N b) +7 N d) 7+ N Steel steel Shuninunon steel Copper om te Balkon concrete mwand 0.37 03.17 0. 1. 11. We won wetu W dni Icon Select one

A post-tensioned bonded concrete beam has a prestress of 1560 kN in the steel immediately after prestressing which eventually reduces to 1330 KN. The beam carries two live loads of 45 kN each in addition to its own weight of 4.40 kN/m. a) Compute the extreme fiber stresses at mid-span under the initial condition with full prestress and no live load b) time dependent losses assume all need data) c) Compute the extreme fiber stresses at mid-span under final condition after all the losses have taken place and with full live load. 45kN 45kN 4.50m 3.00m 4.50m 300 009 GP. Ancog 1 1 1 1 1 1 1 1175 Mid span section