Military Vehicles
Underwater vehicle
submarine
Invented by ___
The Chinese
What kind of simple machine is a catapult?
Lever
Ballistics
study of objects moving through the air
this military invention was first used in WWI
Tank
first used for chariots: true or false?
false- gunpowder was first used for fireworks
A type of machine that used a large counterweight to launch a projectile
Trebuchet
RADAR
Radio Detection and Ranging - detection of objects using radio waves
elephants used to serve some of the same purposes as___
Tanks
Name the ingredients in gunpowder
sulfur, saltpeter, carbon
in a first class lever, the effort is in the middle. true or false?
false, in a first class lever, the fulcrum is in the middle, not the effort.
SONAR
Sound Navigation and Ranging- use of sound waves to detect objects
At what depth is a submarine designed to operate?
2000- 5000 feet deep
Buoyancy
the upward force that a liquid or gas exerts on an object
tanks usually use a ____ engine
diesel
Ballast
material carried for the purpose of changing the weight of a vehicle