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Astronomy is the scientific study of the objects visible in the night sky by means of telescopes and associated instruments that analyze the radiation received from these objects.
The greenhouse effect is the physical mechanism by which the atmosphere helps to maintain Earth's surface temperature within a range comfortable for organisms and ecological processes.
An element is defined by the number of protons in the nucleus of its atoms, but its chemical reactivity is determined by the number of electrons in its outer shell—a property fundamental to the organization of the periodic table of the elements.
Two tuning forks have identcal frequencies (350Hz) one of which has small weights attached to the tines. a) What will you hear if they are sounded together. b) The weights are lowered on one tuning fork and you hear 12 beats in 6.0s when the tuning forks are sounded together. What is the new frequency of the weighted tuning fork. Explain c) What will happen to the beat frequency if you lower the weights a little more. Explain your reasoning.
A tuning fork of unknown frequency is sounded with a 512Hz tuning fork. You hear 20 beats in 4.0s a) What are the possible frequencies of the tuning fork? b) A small elastic is placed on the tines of 512Hz tuning fork changing the frequency slightly. Now 16 beats are detected in 4.0s. What is the frequency of the unknown tuning fork and the new frequency of the weighted 512Hz tuning fork? Explain the reasoning.
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