Units Flashcards
(27 cards)
SI Units
Force
Newton
Energy/ Work/ Heat
Joules
Power
Watt (Joules / Second)
Pressure
(Atm) (kPa)
1atm =101.3kPa
Voltage
Volt (Joules/Coulomb)
Current
Amperes (A) (Coulombs per second)
Resistance
Ohms (Voltage/Current) (Volt/Amperes)
Magnetic flux
Weber (Voltage x Time) (Magnetic flux density or magnetic field into area into cosine theta
Theta is the angle between normal line of the surface and magnetic field line
Magnetic field (Magnetic flux density)
Tesla ( Magnetic flux / Area) (Weber/ meter square)
Frequency
Hertz (1 by second)
What is the density of water?
1000kg/cubic meters
Relative density is the same as ________
Specific gravity
Specific gravity is the same as _______
Relative density
What is the relationship between GPE of an object at a certain height and the kinetic energy of that particular object right before it hits the ground when it is dropped from the same height?
Equals
Momentum equals to
Mass into velocity
What is the impulse?
Impulse is the change in momentum.
Pressure formula
Pressure unit conversion
Atm, kPa, mmHg, torr, bar
Fluid pressure
Pressure (Pa) = Density (kg/ m^3) x height (m) x acceleration due to gravity (m/s^2)
Pascals principle
Pascal’s Principle states that when pressure is applied to a confined fluid, the increase in pressure is transmitted equally and undiminished in all directions throughout the fluid and to the walls of its container.
Pascals principle formula, and what is echanical advantage of the system?
Upward buoyant force formula
- The upward buoyant force on a submerged body is the same as the weight of the fluid that it displaces
- Volume of the displaced fluid multiplied into the density of the fluid is the mass of fluid that is displaced.
- Mass times gravity is the weight of the fluid.
- Thus, this formula proves that the buoyant force is the weight of the fluid displaced.
Archimedes principle
The upward buoyant force on a submerged body is the same as the weight of the fluid that it displaces
