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Question 1 3 pts A wire of initial length Lo and radius ro has a measured...
A wire of initial length Ly and radius to has a measured resistance of 2 Ohms....
A wire of initial length Ly and radius to has a measured resistance of 2 Ohms. The wire is drawn under tensile stress to a new uniform radius of r-0270 What is the new resistance of the wire? Hint: Assume the radius and the length of the wire can change. 1.250 Ohms 1875 Ohms 69444 Ohms 3,375 Ohms None of the above
A wire of initial length L0 and radius r0 has a measured resistance of 2 Ohms....
A wire of initial length L0 and radius r0 has a measured resistance of 2 Ohms. The wire is drawn under tensile stress to a new uniform radius of r = 0.2r0. What is the new resistance of the wire? Assume the radius and the length of the wire can change (Assume the radius and the length of the wire can change) 3375 Ohms 69444Ohms 1875Ohms 1250Ohms
D Question 6 5 pts A horizontal length of current-carrying wire is suspended from two identical...
D Question 6 5 pts A horizontal length of current-carrying wire is suspended from two identical flexible leads that are under tension due to the weight of the wire. The wire is oriented at right angles to a uniform magnetic field that has a magnitude of 4 T and is directed out of the screen of the figure. The length L of the wire is 5 cm and its mass mis 10 g. What current will produce a magnetic force...
Figure < 1 of 1 Consider, for instance, a bar of initial length L and cross-sectional...
Figure < 1 of 1 Consider, for instance, a bar of initial length L and cross-sectional area A stressed by a force of magnitude F. As a result, the bar stretches by AL (Figure 1) Let us define two new terms: • Tensile stress is the ratio of the stretching force to the cross-sectional area: stress = 5 • Tensile strain is the ratio of the elongation of the rod to the initial length of the bar strain= 41 It...
Problem 2: (34 pts) For the cylindrical tube (outer radius R. 100mm, initial thickness 1mm before...
Problem 2: (34 pts) For the cylindrical tube (outer radius R. 100mm, initial thickness 1mm before loadings, length 1m) fixed at one end on the wall, an axial loading F = 1000 N and a torsional loading T = 100 N-m are applied. Assuming linear elasticity. Young's modulus E-1 GPa and Poisson ratio v = 0.33. (T = **where ) = (R: - R ) is the polar moment of inertia) a) Calculate the stress state (Cro, and Try) of...
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and...
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and half the radius of the other. How do the resistivities of these two wires compare? A) The longer wire has 4/3 times the resistivity of the shorter wire. B) The longer wire has 3 times the resistivity of the shorter wire. C) Both wires have the same resistivity D) The longer wire has 3/4 times the resistivity of the shorter wire. Problem 9 (5...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
A wire of initial length Ly and radius to has a measured resistance of 2 Ohms. The wire is drawn under tensile stress to a new uniform radius of r-0270 What is the new resistance of the wire? Hint: Assume the radius and the length of the wire can change. 1.250 Ohms 1875 Ohms 69444 Ohms 3,375 Ohms None of the above
D Question 6 5 pts A horizontal length of current-carrying wire is suspended from two identical flexible leads that are under tension due to the weight of the wire. The wire is oriented at right angles to a uniform magnetic field that has a magnitude of 4 T and is directed out of the screen of the figure. The length L of the wire is 5 cm and its mass mis 10 g. What current will produce a magnetic force...
Figure < 1 of 1 Consider, for instance, a bar of initial length L and cross-sectional area A stressed by a force of magnitude F. As a result, the bar stretches by AL (Figure 1) Let us define two new terms: • Tensile stress is the ratio of the stretching force to the cross-sectional area: stress = 5 • Tensile strain is the ratio of the elongation of the rod to the initial length of the bar strain= 41 It...
Problem 2: (34 pts) For the cylindrical tube (outer radius R. 100mm, initial thickness 1mm before loadings, length 1m) fixed at one end on the wall, an axial loading F = 1000 N and a torsional loading T = 100 N-m are applied. Assuming linear elasticity. Young's modulus E-1 GPa and Poisson ratio v = 0.33. (T = **where ) = (R: - R ) is the polar moment of inertia) a) Calculate the stress state (Cro, and Try) of...
Problem 8 (5 pts): Consider two silver wires, one wire has 3 times the length and half the radius of the other. How do the resistivities of these two wires compare? A) The longer wire has 4/3 times the resistivity of the shorter wire. B) The longer wire has 3 times the resistivity of the shorter wire. C) Both wires have the same resistivity D) The longer wire has 3/4 times the resistivity of the shorter wire. Problem 9 (5...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
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