Share & grow the world's knowledge!
We want to connect the people who have knowledge to the people who need it, to bring together people with different perspectives so they can understand each other better, and to empower everyone to share their knowledge.
What is creep in materials?
Creep occurs when materials deform gradually under sustained stress, especially at high temperatures. This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding. For more please visit here: https://wwwRead more
Creep occurs when materials deform gradually under sustained stress, especially at high temperatures. This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-8/
Which factor does not affect the elasticity of a material?
Elasticity is an intrinsic property and does not depend on the material's dimensions like length. This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding. For more please visit here: https://www.tiwRead more
Elasticity is an intrinsic property and does not depend on the material’s dimensions like length. This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-8/
What type of materials break without significant plastic deformation?
Brittle materials like glass or ceramics break suddenly under stress without significant plastic deformation. This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding. For more please visit here: httRead more
Brittle materials like glass or ceramics break suddenly under stress without significant plastic deformation. This question related to Chapter 8 physics Class 11th NCERT. From the Chapter 8. Mechanical Properties of Solids. Give answer according to your understanding.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-8/
How can the knowledge of elasticity be used to estimate the maximum height of a mountain on earth?
With knowledge of elasticity, one can follow the following procedure to estimate the maximum height of a mountain on Earth. 1. Understanding Elasticity: The term elasticity has a very clear definition: Elasticity is defined as the capability of a material to deform when a stress is applied and recovRead more
With knowledge of elasticity, one can follow the following procedure to estimate the maximum height of a mountain on Earth.
1. Understanding Elasticity: The term elasticity has a very clear definition: Elasticity is defined as the capability of a material to deform when a stress is applied and recover its original form after the removal of the applied stress. The crust of Earth acts elastically for some stress ranges.
2. Estimating Stress: The maximum height of a mountain is influenced by the stress exerted by the weight of the mountain itself. This stress can be estimated using the formula:
σ = F / A
where σ is the stress, F is the force (weight of the mountain), and A is the area over which the force is distributed.
3. Material Property: The yield strength of the rock material constituting the mountain is to be considered. If the stress caused by the mountain’s weight exceeds the yield strength, the deformation of the rock is permanent; therefore, the mountain’s height cannot increase beyond that limit.
4. Finding Maximum Height: The maximum height can be found using the formula for stress, strain, and Young’s modulus E (a measure of stiffness). The formula can be written as:
σ = E * ε
where ε is the strain. This can be rearranged as:
ε = σ / E
The change in height (strain) can be approximated by:
Δh = ε * h
where h is the original height before deformation.
5. Setting Up the Calculation: Substituting the values for stress based on the mountain’s mass and area, along with the elastic properties of the rock, you can estimate the maximum height before reaching the elastic limit.
6. Comparative Analysis: Compare the calculated maximum height with known mountain heights, such as Mount Everest, to validate the estimation. Erosion, tectonic activity, and geological history also play a role in actual mountain heights.
In conclusion, through the knowledge of elasticity, a mountain’s height can be approximated by simply calculating the amount of stress which the mountain imposes, the type of material the rocks are made up of, and the strain as a result of this stress.
Click here for more:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-8/
Describe elastic hysteresis. Mention its few applications.
Elastic hysteresis represents the process in which, in loading and unloading cycles, the stress-strain curve of the material under study shows different paths. This can be considered as an indication of energy dissipation within the material due to internal friction or microstructural change. This iRead more
Elastic hysteresis represents the process in which, in loading and unloading cycles, the stress-strain curve of the material under study shows different paths. This can be considered as an indication of energy dissipation within the material due to internal friction or microstructural change. This is to say that when a material is stretched or compressed, it doesn’t revert back to its original state in the same way that it was deformed, which produces a loop-shaped graph when plotting stress versus strain. The area within this loop represents the energy lost as heat or other forms during the cyclic loading and unloading process.
Applications of Elastic Hysteresis
1. Rubber and Elastomers: For rubber materials, elastic hysteresis is very important, especially in applications such as tires, where the energy loss through hysteresis impacts fuel efficiency and wear resistance.
2. Damping Systems: In mechanical engineering, hysteresis is used in damping systems, such as shock absorbers, where energy dissipation helps to control vibrations and improve stability.
3. Seismic Isolation: In civil engineering, hysteretic materials are used in seismic isolation systems to absorb energy from ground motion during earthquakes, thus reducing the impact on structures.
4. Soft Robotics: Elastic hysteresis is utilized in soft robotics to design compliant actuators that can store and release energy, allowing for smoother and more adaptive movements.
5. Biomedical Devices In the design of some biomedical implants and devices, the understanding of hysteresis improves the fatigue life and performance of the material subjected to cyclic loading.
Elastic hysteresis is one of the crucial concepts in material science and engineering, affecting design and functionality across multiple fields in different applications.
Click this for more solutions:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-8/