Science
I have 6 questions that I need answered as soon as possible

Question Description

I’m stuck on a Physics question and need an explanation.

Physics Homework

Who can answer these question in an hour and a half.

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The ultimate tensile strength for nylon is 5.00×108N/m2. Part A What is the maximum tension possible in a 1.46-mm-diameter nylon tennis racket string? Express your answer to three significant figures and include the appropriate units. Fmax = Part B If you want tighter strings, what do you do to prevent breakage: use thinner or thicker strings? If you want tighter strings, what do you do to prevent breakage: use thinner or thicker strings? use thinner strings use thicker strings Submit Bar Suspended by Two Vertical Strings The figure (Figure 1) shows a model of a crane that may be mounted on a truck.A rigid uniform horizontal bar of mass m1 = 100.0kg and length L = 5.200m is supported by two vertical massless strings. String A is attached at a distance d = 1.300m from the left end of the bar and is connected to the top plate. String B is attached to the left end of the bar and is connected to the floor. An object of mass m2 = 2000kg is supported by the crane at a distance x = 5.000m from the left end of the bar. Throughout this problem, positive torque is counterclockwise and use 9.807m/s2 for the magnitude of the acceleration due to gravity. Part A Find TA, the tension in string A. Express your answer in newtons using four significant figures. TA = N Part B Find TB, the magnitude of the tension in string B. Express your answer in newtons using four significant figures. TB = N SubmitHintsMy AnswersGive UpRev iew Part Part C This question will be shown after you complete previous question(s). Provide Feedback The force required to pull the cork out of the top of a wine bottle is in the range of 180 to 360N . of 1 Part A What range of forces F is required to open a wine bottle with the bottle opener shown in (Figure 1) ? Express your answers using two significant figures separated by a Fmin, Fmax = comma. N Part A Approximately what magnitude force, FM, must the extensor muscle in the upper arm exert on the lower arm to hold a 5.7-kg shot put (Figure 1) ? Assume the lower arm has a mass of 3.1kg and its CG is 12cm from the elbow-joint pivot. Express your answer to two significant figures and include the appropriate units. FM = A 16cm long tendon was found to stretch 4.8mm by a force of 11.9N . The tendon was approximately round with an average diameter of 8.8mm . Part A Calculate the Young's modulus of this tendon. Express your answer using two significant figures. E= A sign (mass 2300kg ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.014m2 . Ignore the mass of the girder itself. The elastic modulus for steel is 2.0×1011N/m2. Part A What is the stress within the girder? Express your answer to two significant figures and include the appropriate units. stress = Part B What is the strain on the girder? Express your answer to two significant figures. strain = Part C If the girder is 6.30m long, how much is it lengthened? Express your answer to two significant figures and include the appropriate units. Δℓ = The Achilles tendon is attached to the rear of the foot as shown in (Figure 1) . A person elevates himself just barely off the floor on the "ball of one foot." Assume the person has a mass of 60kg and D is twice as long as d. Part A Find the tension FT in the Achilles tendon (pulling upward). Express your answer to two significant figures and include the appropriate units. FT = Part B Find the (downward) force FB exerted by the lower leg bone on the foot. Express your answer to two significant figures and include the appropriate units. FB = ...
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Final Answer

Alex Z (997)
Duke University

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