1
What do airplanes have to reduce drag?
special flaps
when the objects weight is greater than the fluid displaced.
sinking
The amount of matter in a given space?
Density
what is the forward force produced by an airplane’s engines?
thrust
What gas is less dense than air
Helium
when the objects weight is equal to the fluid displaced.
floating
when the objects weight is less than the fluid displaced.
buoying up
The upward force that fluids exert on all matter?
buoyant force
what is the force that opposes resists motion in a fluid?
drag
the density of water is how many times greater than air
1000
What does the pressure of the atmosphere varies based on the
altitude
what devices use liquid to transmit pressure from one point to another?
Hydraulic devices
the amount of force exerted on a given area?
pressure
what is any material that can flow and takes the shape of the container
Fluid
what plane has smaller wings?
jet
Fluid pressure decreases as the speed of the fluid increases.
Bernoulli's principle
A change in pressure at any point in an enclosed fluid will be transmitted equally to all parts of that fluid.
Pascals'
what is the SI unit of pressure?
pascal
What is pressure caused by the weight of the atmosphere?
Atmospheric pressure
What plane has larger wings?
glider
The buoyant force of an object in a fluid is an upward force equal to the weight of the volume of fluid that an object displaces.
Archimedes' principle
what is the Standard atmospheric pressure
101,300 pa
what is an upward force on an object that opposes the downward pull of gravity?
lift
What increases with depth due to gravity?
water pressure
What % of all gases are found 10 km from earths surface?
80%