Physical Technics; Or, Teacher's Manual of Physical Manipulation, Etc (Paperback)

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Part IV. TEST QUESTIONS. 1. Describe an experiment which you have performed at your home, and state the lesson derived from it. 2. Why, as you raise the vessel B, Fig. 22, Physics, higher and higher, is the rubber forced inward more and more ? 3. Name some phenomena which are the result of the earth's attracting the moon and the moon's attracting the earth. Ans. The former attraction mainly keeps the moon in her orbit, and the latter is one of the causes of tidal phenomena. 4. What is the distinction between mass and weight? Which better defines a body ? Why ? 5. If the earth were a homogeneous shell devoid of air, and a person were to jump from one side toward the center, where would he stop? Could he stop at the center? Would his path be straight or curved? Would his motion be accelerated, retarded, or uniform ? What would be the effect produced upon the earth at the instant he jumps ? If the earth and his body were perfectly elastic (i.e., the coefficient of restitution = 1), how long would he continue to move ? If in his journey through the hollow space he should let drop a ball, what would become of it? 6. If the earth were a homogeneous sphere, and a hole extended from surface to surface through the center, and the hole were a vacuum, and a ball should be dropped into it, where would it stop? Where would it have its maximum velocity? How long would it continue to move ? 7. A coil of glass tubing, after being suspended for a year, became permanently stretched. What property does this phenomenon show that glass possesses ? 8. One man holds one end of a rope in his hands, and another man pulls the other end of the rope with a force of 90 Ibs. What force does the latter compel the former to exert in order to retain the rope in his hands ? Ans. 90 Ibs...