Common Science. Carleton Washburne

      Published by Good Press, 2019

       [email protected]

      EAN 4057664581624

Table of Contents

       COMMON SCIENCE

       CHAPTER ONE

       GRAVITATION

       Fig. 1. The water in the tube rises to the level of the water in the funnel.

       Fig. 2. Where is the best location for the tank?

       Fig. 3. When the tank is full, will the oil overflow the top of the tube?

       Fig. 4. When the point is knocked off the electric lamp, the water is forced into the vacuum.

       Fig. 5. The water is held in the tube by air pressure.

       Fig. 6. An air pump.

       Fig. 7. The experiment with the Magdeburg hemispheres.

       Fig. 8. A siphon. The air pushes the water over the side of the pan.

       Fig. 9. A glass model suction pump.

       Fig. 10.

       Fig. 11. The battleship is made of steel, yet it does not sink.

       Fig. 12. The upper tube is filled with water and the lower with oil. What will happen when she pulls the cardboard out?

       Fig. 13. The Leaning Tower of Pisa.

       Fig. 14.

       Fig. 15. In this cylinder the center of weight is so high that it is not over the bottom if the cylinder is tipped to any extent. So the cylinder falls over easily and lies quietly on its side.

       Fig. 16. But in this one the center of weight is so low that it is over the base, no matter what position the cylinder is in.

       Fig. 17. So even if the cylinder is laid on its side it immediately comes to an upright position again.

       Fig. 18. Which vase would be the hardest to upset?

       CHAPTER TWO

       MOLECULAR ATTRACTION

       Fig. 19. Will the water be drawn up higher in the fine glass tube or in a tube with a larger opening?

       Fig. 20. The water rises through the lamp wick by capillary attraction.

       Fig. 21. As the finger is raised the water is drawn up after it.

       Fig. 22. El Capitan, Yosemite Valley, California. If the force of cohesion were suspended, a mountain like this would immediately become the finest dust.

       Fig. 23. The mercury does not wet the finger, and as the finger is lifted the mercury does not follow it.

       Fig. 24. Hockey is a fast game because there is little friction between the skates and the ice.

       Fig. 25. The friction of the stone heats the nail and wears it away.

       CHAPTER THREE

       CONSERVATION OF ENERGY

       Fig. 26. The little girl raises the big boy, but in doing it she moves twice as far as he does.

       Fig. 27. The yardstick is a lever by which he lifts the pail.

       Fig. 28. A lever with the weight between the fulcrum and the force.

       Fig. 29. You cannot pinch hard enough this way to hurt.

       Fig. 30. But this is quite different.

       Fig. 31. When the handle is turned the blades of the egg beater move much more rapidly than the hand. Will they pinch hard enough to hurt?

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