
Interpretation:
The term "composition of material" is to be defined.
Concept introduction:
A material is an object which is composed of mixture of substances or of a chemical substance. These can be pure or impure, living or non-living and can be classified according to the physical and chemical properties, their geological origin or functions they perform biologically.

Explanation of Solution
The relative amount of all the elemental species present in a material is known as the composition of a material. Chemical formula such as, empirical or molecular formula can be used to express it.
For example, water is a material composed of hydrogen (H) and oxygen (O) with the formula
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Chapter 2 Solutions
Essentials Of Materials Science And Engineering
- A rod coincident with the z-axis extends from 0 to -L. If the rod carries a uniform charge density of pL (a) calculate the electric field intensity at a point h on the z-axis. (b) Use your answer to show that when h>>L the rod behaves as a point charge of value plL . (c) How much larger than the length of the rod must h be in order that the answer to part b) is a reasonably accurate estimate.arrow_forwardThe separation of two point charges with charges Q1=36pC and ,Q2=9pC respectively, is 3 cm. If a third point charge Q3 is placed on the line joining Q1 and Q2 at a distance d from Q1 find Q3 and d that ensures that the force on all charges is zero.arrow_forward5. The electric field on the positive z-axis due to a uniformly charged disk of radius a that lies in the x-y plane with center at the origin is claimed to be given by - Ps Z 2E 2 a² + z² Where ps is the surface charge density on the disk. Without deriving this formula, evaluate it for its probable correctness. (a) Is its symmetry correct? Explain. (b) If z>> a, it reduces to that of a point charge of value a²ps (c) if z> z is large the formula reduces to that of an infinite plane.arrow_forward
- ทำโจทย์arrow_forwardA rod coincident with the z-axis extends from 0 to L. If the rod carries a uniform charge density of pL , calculate the electric field intensity at a point h on the y-axis.arrow_forwardLet the x-axis carry a line charge of 2 nC/m and a plane Z=3 carry a surface charge of 5 nC/m^2. If a point charge of 100pC is located at (4,1,-3), find E at (1, 1,1).arrow_forward
- "11-17 The shaft shown in Figure P11-3 was designed in Problem 10-17. For the data in the row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in Problem 10-17, design suitable bearings to support the load for at least 1E8 cycles at 1800 rpm. State all assumptions. (a) Using hydrodynamically lubricated bronze sleeve bearings with Ox = 15, 11d=0.75, and a clearance ratio of 0.001. ✓ ✓ cast-iron roller FIGURE P11-3 Shaft Design for Problems 11-17 b gear key assume bearings act as simple supports 11-19 The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in the row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in Problem 10-19, design suitable bearings to support the load for at least 5E8 cycles at 1200 rpm. State all assumptions. (a) Using hydrodynamically lubricated bronze sleeve bearings with Oy = 40, 1/d=0.80, and a clearance ratio of 0.002 5. gear gear key FIGURE P11-4 Shaft Design for Problems 11-19 and…arrow_forwardFor the frame below calculate the bending moment at point R. Take P=40 and note that this value is used for both the loads and the lengths of the members of the frame. 2.5P- A Q B R С 45 degrees ✗ ✗ P i 19 Кур -2P- 4PRN -P- -arrow_forwardCalculate the bending moment at the point D on the beam below. Take F=79 and remember that this quantity is to be used to calculate both forces and lengths. 15F 30F A сarrow_forwardShow work on how to obtain P2 and T2. If using any table, please refer to it. If applying interpolation method, please show the work.arrow_forwardcast-iron roller FIGURE P11-3 Shaft Design for Problems 11-17 Chapter 11 BEARINGS AND LUBRICATION 677 gear key P assume bearings act as simple supports 11-18 Problem 7-18 determined the half-width of the contact patch for a 1.575-in-dia steel cylinder, 9.843 in long, rolled against a flat aluminum plate with 900 lb of force to be 0.0064 in. If the cylinder rolls at 800 rpm, determine its lubrication condition with ISO VG 1000 oil at 200°F. R₁ = 64 μin (cylinder); R₁ = 32 μin (plate). 11-19 The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in the row(s) assigned from Table P11-1, and the corresponding diameter of shaft found in Problem 10-19, design suitable bearings to support the load for at least 5E8 cycles at 1200 rpm. State all assumptions. (a) (b) Using hydrodynamically lubricated bronze sleeve bearings with ON = 40, 1/ d=0.80, and a clearance ratio of 0.002 5. Using deep-groove ball bearings for a 10% failure rate. *11-20 Problem 7-20 determined the…arrow_forwardCalculate the shear force at the point D on the beam below. Take F=19 and remember that this quantity is to be used to calculate both forces and lengths. 15F A сarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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