30 Questions
What is the specific gravity of a substance defined as?
The ratio of the density of the substance to the density of water at 4.0°C
Which state change is associated with an endothermic process?
Melting
What property does pressure represent?
Force per unit area
Which principle explains why objects float or sink in a fluid?
Archimedes Principle
How is density defined for a substance?
Mass per unit volume of the substance
What quantity does the specific gravity of urine indicate?
Concentration of particles in urine
In a fluid at rest, what is true about the pressure at any given depth?
It is the same in all directions at that depth
How is fluid pressure related to the depth within the liquid?
It increases as the depth increases
What happens to the weight of an object when it is wholly or partly immersed in a fluid?
It decreases
If blood pressure is measured with the cuff around the calf of the leg (standing position), what would be expected compared to measuring on the arm?
The reading would be greater around the calf
What is another term for the upward force exerted on an object immersed in a fluid?
Buoyant force
Which property is responsible for an object's tendency to float in a fluid?
Buoyancy
What factor affects buoyant force according to the text?
The density of the fluid
According to the concept mentioned, what is needed for a fluid to exhibit laminar flow?
Low viscosity
What does the statement 'The buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object' describe?
Archimedes' principle
Which type of flow is characterized by erratic, small whirlpool-like circles called eddy currents?
Turbulent flow
What is viscosity a measure of in fluids?
Frictional force between layers
In fluid dynamics, what factors influence the flow of fluid as per the text?
Viscosity and pressure gradient
What is the term used to describe the attractive forces between molecules that give rise to surface tension?
Cohesion
What type of pump is designed to increase the pressure in a given vessel?
Force Pump
Which term refers to the force per unit area causing deformation in a material?
Tensile Stress
What is the measure of the amount of deformation in a material?
Strain
Which type of strain results in the elongation of a solid body due to an applied tensile force?
Tensile Strain
What is the term for the deformation in a solid due to compressive stress?
Compressive Deformation
What is the region in the stress-strain curve that obeys Hooke’s Law?
Proportional limit
At what point in the graph does the material return to its original position when the load acting on it is removed?
Elastic limit
What occurs after the yield point is passed?
Permanent plastic deformation
Which point represents the maximum stress that a material can endure before failure?
Ultimate stress point
What does the Proportional limit state about the material?
The strain of the material is proportional to the applied stress within the elastic limit
What does the term 'Fracture or breaking point' signify in a stress-strain curve?
"Maximum force per unit area the material can withstand before it breaks or fractures"
Test your knowledge on the mechanical properties of materials including compressive strain, proportional limit, elastic limit, and yield point. Understand how materials respond to external forces and stresses.
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