I would say trains, airplanes, cars, and list some more inventions that were made long time ago.
hope that this helps you. =)
Answer:
The higher the temperature the less dense something is. Temperature is the measurement of the average kinetic energy of the particles in the substance. let us consider water as the temperature lower then it forms ice and it's density will be lower than the density of water so that temperature is directly proportional to the density
Due to thermal expansion, as temperature increases, density decreases.
Explanation:
In the picture to the right iron filings have been sprinkled around a bar magnet. The iron filings outline the magnetic field lines, making it visible. Magnetic fields all have a pair of "poles", from which "lines of force" or magnetic field lines appear to originate.
Do you need the answer from the quadratic formula? if so:
x^2=a
-3x=b
-18=c
Your answer would then be 6 and -3
Answer: Paper money and woodblock printings are linked because woodblock printing made the production of paper money much faster.
Explanation:
