Civil Engineering
What is the strongest shape to build with?
triangles
What forces are acting on a parachute to slow it down?
Drag or air resistance
Name 3 types of simple machines
Pulleys, levers, wedge, screw, wheel and axle
What is a resistor?
This is a electrical circuit component that resist the flow of current
What is a catalyst?
Substance that increases the rate of a chemical reaction without being consumed
What are 2 of the 4 most common bridges?
beam, arch, suspension, and truss bridge
Why do rockets have a round nose shape at the top?
To avoid heating up and minimize drag
What is Newtons 3rd law of motion?
For every action force, there is a opposite and equal reaction force
What is a volt?
It is the electrical potential, potential difference, and electromotive force
What is the first law of thermodynamics?
Energy can not be created or destroyed
What is a truss bridge?
A type of bridge that uses triangular structures to spread load
What is drag?
an aerodynamic force that opposes an objects motion in the air
What is the law of inertia?
An object in motion remains in motion
What is the purpose of grounding?
Provides a safe path for excess electricity to escape
Complete this reaction (Must be balanced as well):
6CO2 + H2O -->
C6H12O6 + 6O2
What is shier force?
Unaligned forces acting on one part of a body in a specific direction, and another part of the body in the opposite direction.
What is Bernoulli's principle?
As the speed of fluid increases, its pressure decreases
What is the difference between torque and force?
force is the push or pull used to move an object in a straight line, while torque is the amount of effort used to rotate an object.
What does DVOM stand for?
Digital Volt Ohm Meter
What is the boiling temperature of water IN KELVINS
317 kelvins
What is the difference between tensile and compression strength?
Tensile strength is a objects resistance to being elongating and being pulled apart while compression strength is the capacity of a material to resist loads that reduce size
What are the 4 main forces acting on an aircraft in the air?
Thrust, drag, lift, and weight
What is a tachometer?
Device used to measure the rotational speed
What is Ohms law?
States the relationship between current, resistors, and voltage. Current is proportional to voltage and inversely proportional to current.
What colour are acids, bases, and neutral solutions when mixed with cabbage juice?
Acid - pink
Base - yellow
Neutral - blue or purple