Connect 1 Semester Access Card For Electric Motors And Control Systems
2nd Edition
ISBN: 9781259550195
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 1.2, Problem 3DT
Why can birds safely rest on high-voltage powerlines without getting shocked?
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Please sovle this for me and please don't use ai
3. The cold-drawn AISI 1040 steel bar shown in the figure is subjected to a
completely reversed axial load fluctuating between 28 kN in compression to 28 kN
in tension. Estimate the fatigue factor of safety based on achieving infinite life (using
Goodman line) and the yielding factor of safety. If infinite life is not predicted,
estimate the number of cycles to failure.
25 mm +
6-mm D.
10 mm
CORRECT AND DETAILED SOLUTION WITH FBD ONLY. I WILL UPVOTE
1. The truss shown is supported by hinge at A and cable at E.Given: H = 4m, S = 1.5 m, α = 75⁰, θ = 33⁰.Allowable tensile stress in cable = 64 MPa.Allowable compressive stress in all members = 120 MPaAllowable tensile stress in all members = 180 MPa1.Calculate the maximum permissible P, in kN, if the diameter of the cable is 20 mm.2.If P = 40 kN, calculate the required area (mm2) of member BC.3. If members have solid square section, with dimension 15 mm, calculate the maximum permissible P (kN) based on the allowable strength of member HI.ANSWERS: (1) 45.6 kN; (2) 83.71 mm2; (3) 171.76 kN
Chapter 1 Solutions
Connect 1 Semester Access Card For Electric Motors And Control Systems
Ch. 1.1 - Does the severity of an electric shock increase...Ch. 1.1 - a. Calculate the theoretical body current flow...Ch. 1.1 - Normally a 6 volt lantern battery capable of...Ch. 1.1 - Prob. 4RQCh. 1.1 - What circuit fault can result in an arc flash?Ch. 1.1 - Defineeach of the following terms associated...Ch. 1.1 - Explain why an arc flash is so potentially...Ch. 1.1 - State the piece of electrical safety equipment...Ch. 1.1 - Outline the safety procedure to follow when you...Ch. 1.1 - List three pieces of personal protection...
Ch. 1.2 - Prob. 1RQCh. 1.2 - Prob. 2RQCh. 1.2 - Prob. 3RQCh. 1.2 - List the seven steps involved in a...Ch. 1.2 - Prob. 5RQCh. 1.2 - Prob. 6RQCh. 1.2 - How are the standards contained in the...Ch. 1.2 - Explain the difference between a Code Article and...Ch. 1.2 - Prob. 9RQCh. 1.2 - Prob. 10RQCh. 1.2 - Prob. 11RQCh. 1.2 - Prob. 12RQCh. 1.2 - The voltage between the frame of a 3-phase 208...Ch. 1.2 - Prob. 2TCh. 1.2 - Prob. 3TCh. 1.2 - A hot stick is to be used to open a...Ch. 1.2 - An employee is contemplating using his lockoutlock...Ch. 1.2 - Prob. 1DTCh. 1.2 - Prob. 2DTCh. 1.2 - Why can birds safely rest on high-voltage...
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- CORRECT AND DETAILED SOLUTION WITH FBD ONLY. I WILL UPVOTE 2: A wire 4 meters long is stretched horizontally between points 4 meters apart. The wire is 25 mm2 in cross-section with a modulus of elasticity of 200 GPa. A load W placed at the center of the wire produces a sag Δ.1.Calculate the tension (N) in the wire if sag Δ = 30 mm.2.Calculate the magnitude of W, in N, if sag Δ = 54.3 mm.3. If W is 60 N, what is the sag (in mm)?ANSWERS: (1) 562 N, (2) 100 N, (3) 45.8 Narrow_forwardCORRECT AND DETAILED SOLUTION WITH FBD ONLY. I WILL UPVOTE 4 : A cable and pulley system at D is used to bring a 230-kg pole (ACB) to a vertical position as shown. The cable has tensile force T and is attached at C. The length of the pole is 6.0 m, the outer diameter is d = 140 mm, and the wall thickness t = 12 mm. The pole pivots about a pin at A. The allowable shear stress in the pin is 60 MPa and the allowable bearing stress is 90 MPa. The diameter of the cable is 8 mm.1.Find the minimum diameter (mm) of the pin at A to support the weight of the pole in the position shown.2.Calculate the elongation (mm) of the cable CD.3.Calculate the vertical displacement of point C, in mm.ANSWERS: (1) 6 mm, (2) 1.186 mm, (3) 1.337 mm--arrow_forward1. Derive an expression for H(w) filter or bandpass/reject filter. = for the circuit below. Qualitatively determine if it's a high/lowpass L ell R ww Voarrow_forward
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