physics rev 5 - pt 1 Flashcards
(31 cards)
- A collection of molecules that are randomly arranged and held together by weak cohesive forces and by forces exerted by the walls of a container.
FLUIDS
Matter with indefinite shape and definite volume and exhibits the phenomenon of flow
FLUIDS
: expand to fill their container’s shape
Gases
: flow under the influence of gravity until they occupy the lowest possible regions of their containers
Liquid
: liquid that becomes strongly polarized in the presence of a magnetic field
Ferrofluid
- Ratio of a material’s mass to its volume
DENSITY
- The ratio of the density of the object to that the of standard substance
SPECIFIC GRAVITY
- Dependent on density and depth of the fluid.
. PRESSURE *
In a column of water, the highest pressure would be at the ______
bottom
Pressure applied to an enclosed fluid is transmitted undiminished to every point in the fluid and to the walls of the container
PASCAL’S LAW
upward force exerted on objects submerged in fluids
Buoyant force:
: The force caused by pressure variation with depth to lift immersed objects
Buoyancy
Increase in the speed of a fluid = decrease in pressure or a decrease in the fluid’s potential energy
Slow-flowing fluid exerts more pressure than a fast-flowing fluid.
BERNOULLI’S PRINCIPLE
total mechanical energy of a streamlined fluid, including pressure, kinetic, and potential energies, remains constant throughout the flow
BERNOULLI’S PRINCIPLE
- Water emerging from the hole with speed equal to the speed it would have if it dropped in free fall a distance
TORRICELLI’S THEOREM
- In a situation with constant mechanical energy, the velocity of a fluid passing through a constricted area will increase and its static pressure will decrease.
VENTURI EFFECT
The effect utilizes both the principle of continuity and the principle of conservation of mechanical energy.
VENTURI EFFECT
Heat transfer occurs between objects by direct contact.
conduction, convection, or radiation?
conduction
Heat transfer occurs due to the difference in temperature.
conduction, convection, or radiation?
conduction
Slow heat transfer
conduction, convection, or radiation?
conduction
Heat transfer occurs through a heated solid object.
conduction, convection, or radiation?
conduction
It does not follow the law of reflection and refraction.
conduction, convection, or radiation?
conduction and convection
conduction, convection, or radiation?
Heat transfer occurs within the fluid.
convection
conduction, convection, or radiation?
Heat transfer occurs through intermediate objects (heat transfer between air and water).
convection
