A cylindrical tank is assembled by welding steel sections circumfer-entially. Tank diameter is 1.5 m, thickness is 20 mm, and internal pressure is 2.0 MPa. The maximum tensile stress in the cylindrical part of the tank is approximately:
(A) 45 MPa
(B) 57 MPa
(C) 62 MPa
(D) 75 MPa
(D) 75 MPa
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Place the following items in order of actual physical size, from smallest to largest
A) planets and stars are about the same size, solar system, galaxy B) star, planet, solar system, galaxy C) star, planet, galaxy, solar system D) planet, star, galaxy, solar system E) planet, star, solar system, galaxy
For driving voltage 
, the current through the resistor is
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A.
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A platinum wire that is 1.20 m long has a radius of 0.500 mm and is fixed at both ends. In its third harmonic it vibrates at 512 Hz. The density of platinum is 21.4 × 103 kg/m3. What is the tension in the wire?
A) 4.00 kN B) 2.00 kN C) 2.82 kN D) 1.41 kN E) 1.00 kN
The direction of the force on a current-carrying wire in a magnetic field is described by which of the following?
A) parallel to the current only B) parallel to the magnetic field only C) perpendicular to the current only D) perpendicular to the magnetic field only E) perpendicular to both the current and the magnetic field