Chapter 7, Problem 6DP

The constant 180 N-m counterclockwise couple acts on the L-shaped rod ABC, which rotates freely in the vertical plane about the pin at A. At this moment, the angular velocity of the rod is 2 rad/s counterclockwise. Determine the angular acceleration of the rod and the reactions at A in the position shown. Answer: a=1.7 rad/s², Ax = 25.3 N, Ay = 603 N 180 N-m 1.2 m 24 kg 20 kg B 1.0 m

Circular fins of uniform cross section, with diameterof 10 mm and length of 50 mm, are attached to a wallwith surface temperature of 350°C. The fins are made ofmaterial with thermal conductivity of 240 W/m·K, and theyare exposed to an ambient air condition of 25°C and the convectionheat transfer coefficient is 250 W/m2·K. Determinethe heat transfer rate and plot the temperature variation of asingle fin for the following boundary conditions:(d) Convection from the fin tip

i am very confused any help appriechated

2-1) Lathi & Ding prob. 2.5-2 For the signals y(t) and x(t) shown below, find the component of the form y(t) contained in x(t). In other words, find the optimum value of c in the approximation x(t) = cy(t) so that the error signal energy is minimum. Also compute the error signal energy. y(t) x(t) 0 1 0 1

1. Is1 = 2ls2 = 4 × 10-16 A, B₁ = ẞ2 = 100, and R₁ = 5 kQ. Find the VB such that lx = 1 mA. (30 points) R1 ww Q2 + VB Figure 1

2-2) Lathi & Ding prob. 2.6-1 2.6-1 Find the correlation coefficient p between of signal x(t) and each of the four pulses g1(1), 82(1), 83(1), and g4(f) shown in Fig. P2.6-1. To provide maximum margin against the noise along the transmission path, which pair of pulses would you select for a binary communication? Figure P.2.6-1 x(f) (a) 8(1) (b) 82(1) (c) 1 1 sin 2πt sin 4πt -sin 2 0 0.707 83(1) 0 1 (d) 0 M P 0.707 84(1) (e) 0 0.5 -0.707

Problem 3. 1.5 m B PROBLEM 16.121 End A of the 6-kg uniform rod AB rests on the inclined surface, while end B is attached to a collar of negligible mass which can slide along the vertical rod shown. Knowing that the rod is released from rest when = 35° and neglecting the effect of friction, determine immediately after release (a) the angular acceleration of the rod, (b) the reaction at B. 25°

Problem 16 Custom Subnet Masks Number of needed usable hosts 29 Network Address 23.0.0.0 Address class Default subnet mask Custom subnet mask Total number of subnets Total number of host addresses Number of usable addresses meldon edmuM sasibbs aldeas to Show your work for Problem 16 in the space below. 256 128 64 32 16 8 4 2 512 65,536 1,024 32,768 2,048 4,096 16,384 8.192 8,192 4,096 2,048 1,024 65,536- 131,072- 262,144. 524,288. 1,048,576- 2,097,152- 1.194,304 512 Number of Hosts- Number of Subnets 2 4 8 16 32 64 128 256 262,144 524,288 Binary values -128 64 32 23.0 0 0 0 0 0 0 0 4,194,304 2,097,152 16 8 4 2 1 128 64 32 16 4 8 2 1 128 64 32 16 8 4 2 1 131,072 O O O O 0 0 0 0 0 0 0 0.00000000 tendua ed ai tan Sendez st est Loser Stendua 27

Problem 1. End A of the uniform 5-kg bar is pinned freely to the collar, which has an acceleration a = 4 m/s² along the fixed horizontal shaft. If the bar has a clockwise angular velocity @ = 2 rad/s as it swings past the vertical, determine the components of the force on the bar at A for this instant. Answers: Ax = 5 N, Ay = 57.1 N L X AO 0.8 m @ a