The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1. High-density polyethylene (HDPE)

Question

In baseball, batters frequently attempt to hit a ball as far as possible. However, baseballs are inelastic with an officially required "coefficient of restitution" CR ≈ 0.55 on ash wood. The coefficient of restitution of a dropped ball iswhere H is the initial drop height, h is the max. height on the rebound, and h ≈ 2πH tan δ for a homogeneous material. Assuming that a baseball is homogeneous and has a storage modulus approximately the same as that of cork (E' = 18.6 MPa), what must the value of the loss modulus E'' be so that the ball is regulation?

Answer 1

Question

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

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In baseball, batters frequently attempt to hit a ball as far as possible. However, baseballs are inelastic with an officially required "coefficient of restitution" CR ≈ 0.55 on ash wood. The coefficient of restitution of a dropped ball iswhere H is the initial drop height, h is the max. height on the rebound, and h ≈ 2πH tan δ for a homogeneous material. Assuming that a baseball is homogeneous and has a storage modulus approximately the same as that of cork (E' = 18.6 MPa), what must the value of the loss modulus E'' be so that the ball is regulation?

The creep strain rate of a polymer (in “Hz”) is given by where T is the temperature and Q = 100. kJ/mol is the activation energy. How long t will it take for a rod of this polymer to extend from 10. mm to 15 mm at 100. °C?

Creep compliance J(t) An amorphous polymer has Tg = 100 °C. A creep modulus of 1/J = 1 GPa was measured after t₁ = 1 h at T₁ = 90 °C. Suppose that log 10 a (T) = 17.5(T-Tg) 52+(T-Tg) 1 for this material. What is the shift factor a at T = T₁ relative to the reference Tg? What is the time t₂ required to reach a modulus of 1 GPa at T2 = 80 °C? TR = T = 100 °C |J(t) = 1 GPa-1 + log a(T₁) T₁ = 75 °C T₂ = 50 °C log tr log t₁ log t log t₂ = ?

Answer 2

Question

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

Expert Solution & Answer

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Answer 3

Question

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

Expert Solution & Answer

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Answer 4

Question

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

Expert Solution & Answer

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See solution

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Answer 5

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

Answer 6

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

Answer 7

Chapter 15, Problem 2QAP

(a)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

Answer 8

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

Answer 9

(b)

To determine

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

Answer 10

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

Answer 11

(c)

To determine

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde

Answer 12

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Answer 13

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Answer 23

Ch. 15 - Prob. 1QAP Ch. 15 - Prob. 2QAP Ch. 15 - Prob. 3QAP Ch. 15 - Prob. 4QAP Ch. 15 - Prob. 5QAP Ch. 15 - Prob. 11QAP Ch. 15 - Prob. 14QAP Ch. 15 - Prob. 15QAP Ch. 15 - Prob. 16QAP Ch. 15 - Prob. 21QAP

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1. High-density polyethylene (HDPE)

To compute: The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1. High-density polyethylene (HDPE)

To compute: The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1. Nylon

To compute: The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1. Phenol-formaldehyde

Chapter 15 Solutions

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

High-density polyethylene (HDPE)

To compute:

The elastic modulus of the following polymers from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Nylon

To compute:

The elastic modulus of the following polymer from the graph that is present in the Tensile test module of Virtual Material science and engineering (VMSE) and compare those values with the value present in Table 15.1.

Phenol-formaldehyde