<u>Under normal driving conditions, in a clear weather with good visibility and dry roads</u>, a driver driving a normal sized vehicle is advised to stay at least two seconds behind the vehicle in front.
However for a 30 foot bus which is heavier than a normal sized vehicle, and takes longer to come to a stop when the brakes are applied, <u>the driver is advised to stay at least four seconds behind the vehicle in front.</u>
Dependency theory is the theory that explains the outflow of resources from poor and underdeveloped nations to wealthy and developed countries, thereby making the wealthy nations wealthier.
Modernization theory on the other hand is the theory that explains the social change in which underdeveloped and developing countries continue to develop as they adopt modern practices similar to more developed societies.
Also, the Centre-Periphery theory is the theory that defines the structural connection between the developed states (center) and the underdeveloped states (periphery) usually within a country.
Karl Popper proposed the theory of falsification. According to potent philosophers that a theory to be considered scientific if the hypothesis has a capability of being tested and proven false. Hypothesis is a statement which may be true or false. if the hypothesis proven true due to a number of experiments so it becomes theory. For example, if someone hypothesis that all swans are white so this statement can be falsified by observing a black color swan.