Disc Natural Science Exam Questions With Correct Answers

What practical use has been found for radio waves? - ANSWER-Cell phone communications Blue light has a higher frequency than red light, therefore blue light - ANSWER-Transmits more energy than red light Standing at a station on the New Jersey Transit railroad line you hear the horn from an approaching train. The horn sounds like it changes in pitch from a low frequency to a higher frequency as the train reaches the situation. This is probably caused by: - ANSWER-The Doppler Shift Which pf the following is the same for all kinds of electromagnetic waves? - ANSWER-Speed The ability of microwave ovens to cook depends partly upon the fact that: - ANSWER-Microwaves are absorbed quickly by water molecules The pitch of a sound is determined by the - ANSWER-Frequency of the sound wave What is a fundamental difference between an electromagnetic wave and other types of waves? Electromagnetic waves: - ANSWER-Move without a medium (in a vacuum) To produce a controlled nuclear chain reaction, an absorber, like graphite, is needed to remove all except one neutron from each reaction generation. - ANSWER-TRUE A white light passing through a prism would be analyzed into - ANSWER-A continuous spectrum (a continuum) Which of the following processes take place when visible light falls on a dark color object? - ANSWER-Absorption of the light Sound waves are: - ANSWER-Longitudinal and cannot travel through a vacuum The metallic properties of elements in the Periodic Table: - ANSWER-increase when moving from right to left across a period (row). The chemical properties of an element are determined by the: - ANSWER-Number of outermost (valence) shell electrons