A steel rod of radius R = 15 cm and length ℓ 0 , stands upright on a firm surface. A 65-kg man climbs atop the rod. ( a ) Determine the percent decrease in the rod’s length. ( b ) When a metal is compressed, each atom throughout its bulk moves closer to its neighboring atom by exactly the same fractional amount. If iron atoms in steel are normally 2.0 × 10 −10 m apart, by what distance did this interatomic spacing have to change in order to produce the normal force required to support the man? [ Note : Neighboring atoms repel each other, and this repulsion accounts for the observed normal force.]
A steel rod of radius R = 15 cm and length ℓ 0 , stands upright on a firm surface. A 65-kg man climbs atop the rod. ( a ) Determine the percent decrease in the rod’s length. ( b ) When a metal is compressed, each atom throughout its bulk moves closer to its neighboring atom by exactly the same fractional amount. If iron atoms in steel are normally 2.0 × 10 −10 m apart, by what distance did this interatomic spacing have to change in order to produce the normal force required to support the man? [ Note : Neighboring atoms repel each other, and this repulsion accounts for the observed normal force.]
A steel rod of radius R = 15 cm and length ℓ0, stands upright on a firm surface. A 65-kg man climbs atop the rod. (a) Determine the percent decrease in the rod’s length. (b) When a metal is compressed, each atom throughout its bulk moves closer to its neighboring atom by exactly the same fractional amount. If iron atoms in steel are normally 2.0 × 10−10 m apart, by what distance did this interatomic spacing have to change in order to produce the normal force required to support the man? [Note: Neighboring atoms repel each other, and this repulsion accounts for the observed normal force.]
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.100 μm, what is the length of the fiber?
a 300 kg cylinder that is horizontal. Three steel wires support the cylinder from a ceiling.Wires 1 and 3 are attached at the ends of the cylinder, and wire 2 is attached at the center. The wires each have a crosssectional area of 2.00 * 10-6 m2. Initially (before the cylinder was put in place) wires 1 and 3 were 2.0000 m long and wire 2 was 6.00 mm longer than that. Now (with the cylinder in place) all three wires have been stretched.What is the tension in (a) wire 1 and (b) wire 2?
A steel rod of radius R =15cm and length lo stands upright on a firm surface. A 65-kg man climbs atop the rod.(a) Determine the percent decrease in the rod’s length.(b) When a metal is compressed, each atom moves closer toits neighboring atom by exactly the same fractional amount.If iron atoms in steel are normally 2.0x10-10 m apart, bywhat distance did this interatomic spacing have to changein order to produce the normal force required to supportthe man? [Note: Neighboring atoms repel each other, andthis repulsion accounts for the observed normal force.]
Chapter 12 Solutions
Physics for Scientists and Engineers with Modern Physics
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