Buscar
Estás en modo de exploración. debe iniciar sesión para usar MEMORY

   Inicia sesión para empezar

level: Level 1 of Chapter 7 : Matter and materials

Questions and Answers List

level questions: Level 1 of Chapter 7 : Matter and materials

QuestionAnswer
Define densityMass per unit volume of a substance
What is the formula for densityMass / volume
What is the formula for pressureNormal force ÷ cross-sectional area
What are the units of pressure, what is the special name given?Newtons per square meter (N m^-2) Pascals (Pa)
Pressure of a fluid depends on 3 factors1. Depth h below the surface 2. Density p of the fluid 3. Acceleration due to gravity g
What is the formula for change in pressurDensity × acceleration due to gravity × depth
What does Archimedes' principle stateStates that the upthrust on a body is equal to the weight of the liquid or gas thqt it displaces
What is the volume of the liquid displaced equal to?Is equal to the volume of the liquid taken up by the object
Spring is being squashed and shortened we say that the forces are ...Compressive
What is the formula for spring constant?Force ➗ extension
What is the Si unit for the force constantNewtons per meter or N m^-1
()When does a material obey Hooke's lawA material obeys Hooke's law if the extension produced in it is proportional to the applied force (load)
Define strainStrain is defined as the increase in length of a wire (its extension) divided by its original length
What is the formula used to calculate strain?Extension ➗ original length
What is the formula used to calculate stressNormal force ➗ cross-sectional area
What is Young Modulus?Ratio of stress to strain
What is the formula used to calculate Young modulus?stress ➗ strain
What do we call the energy in a deformed solid?Elastic potential energy or strain energy
What is the formula used to calculate elastic potential energy?½ Fx
What is the unit of pressurePascals Pa