A particle has a particular life span of time t. if the particle moves very fast, relative to a stationary observer, the observer will observe that the life span of the particle is greater than t. If the observer moves toward the source at a speed vo, more waves are intercepted per second and the frequency received by the observer increases.
If the observer is stationary, the frequency received by the observer equals the frequency produced by the source. The measured frequency rises above the source frequency as the observer approaches the stationary source. The observed frequency is lower than the source frequency.
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Answer:The Cold War and decolonization created a Three World order. The First World was the US and its liberal democratic, capitalist allies, the Second World was the USSR and its communist allies, and the new, decolonized nations formed the Third World, a problematic term that students will scrutinize.
Explanation:
It should be Hutsi! I remember this subject from a while back
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