Experimental Mechanics. a Course of Lectures Delivered At the Royal College of Science for Ireland
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In our eReader you can find the full English version of the book. Read Experimental Mechanics. a Course of Lectures Delivered At the Royal College of Science for Ireland Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Experimental Mechanics. a Course of Lectures Delivered At the Royal College of Science for Ireland
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A part of it has been already employed in repeating the experi- ment of Galileo, but two other parts must now be used which will be briefly explained.
505. At a is shown a pendulum which vibrates once every second ; it need not be connected with any clock- work to sustain the motion, as when once set vibrating it will continue to swing some hundreds of times. When this pendulum is at the middle of its swing, the bob just touches a slender spring, and presses it slightly lect. xv.] FALL OF A BOD...Y IN THE FIRST SECOND. 243 downwards. The electric current which circulates about the magnets G already described passes through this spring when in its natural position ; but when the spring is pressed down by the pendulum, the current is interrupted. The consequence is that, as the pendulum swings backwards and forwards, the current is broken once every second. There is also in the circuit a little electric alarum bell c, which is so arranged that, when the current passes, the hammer is drawn from the bell ; but, when the current is interrupted, a spring forces the hammer against the bell and strikes it.
What to read after Experimental Mechanics. a Course of Lectures Delivered At the Royal College of Science for Ireland?
You can find similar books in the "Read Also" column, or choose other free books by Ball, Robert S. (Robert Stawell), Sir, 1840-1913 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A part of it has been already employed in repeating the experi- ment of Galileo, but two other parts must now be used which will be briefly explained.
505. At a is shown a pendulum which vibrates once every second ; it need not be connected with any clock- work to sustain the motion, as when once set vibrating it will continue to swing some hundreds of times. When this pendulum is at the middle of its swing, the bob just touches a slender spring, and presses it slightly lect. xv.] FALL OF A BOD...Y IN THE FIRST SECOND. 243 downwards. The electric current which circulates about the magnets G already described passes through this spring when in its natural position ; but when the spring is pressed down by the pendulum, the current is interrupted. The consequence is that, as the pendulum swings backwards and forwards, the current is broken once every second. There is also in the circuit a little electric alarum bell c, which is so arranged that, when the current passes, the hammer is drawn from the bell ; but, when the current is interrupted, a spring forces the hammer against the bell and strikes it.
What to read after Experimental Mechanics. a Course of Lectures Delivered At the Royal College of Science for Ireland?
You can find similar books in the "Read Also" column, or choose other free books by Ball, Robert S. (Robert Stawell), Sir, 1840-1913 to read onlineMoreLess
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