A Laboratory Course in Everyday PhysicsMacmillan, 1931 - 205 σελίδες |
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Σελίδα 21
... pound of work is done . If 10 lb. of force is required to raise a window , and the window is raised 2 ft . , 20 foot pounds of work are done . If a scuttle of coal weighing 25 lb. is carried up a stairway 8 ft . high , 25 X 8 = 200 foot ...
... pound of work is done . If 10 lb. of force is required to raise a window , and the window is raised 2 ft . , 20 foot pounds of work are done . If a scuttle of coal weighing 25 lb. is carried up a stairway 8 ft . high , 25 X 8 = 200 foot ...
Σελίδα 299
... pound and the gram centimeter . A foot pound of work is done when 1 lb. of force is exerted through a distance of 1 ft . I A gram centimeter of work is done when I g . of force is exerted through a distance of 1 cm . Since the pound of ...
... pound and the gram centimeter . A foot pound of work is done when 1 lb. of force is exerted through a distance of 1 ft . I A gram centimeter of work is done when I g . of force is exerted through a distance of 1 cm . Since the pound of ...
Σελίδα 304
... pounds = = I pound ( lb. ) I pound = 1 hundredweight ( cwt . ) = 1 ton ( T. ) 2000 pounds 2240 pounds = I gross ton Troy Weight For Precious Metals , Jewels , etc. 24 grains = 1 pennyweight ( pwt . ) 20 pennyweights = I Ounce 12 ounces = 1 ...
... pounds = = I pound ( lb. ) I pound = 1 hundredweight ( cwt . ) = 1 ton ( T. ) 2000 pounds 2240 pounds = I gross ton Troy Weight For Precious Metals , Jewels , etc. 24 grains = 1 pennyweight ( pwt . ) 20 pennyweights = I Ounce 12 ounces = 1 ...
Περιεχόμενα
CHAPTER | 1 |
CHAPTER II | 13 |
CHAPTER III | 20 |
Πνευματικά δικαιώματα | |
16 άλλες ενότητες δεν εμφανίζονται
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
amperes appliances armature atmosphere B. T. U. of heat bell body boiling point Boyle's law British Thermal Unit calories carbon centimeter coil cold water compressed convection cooled copper cubic cylinder Daniell cell density diagram direction distance dynamo electric current electromagnet electromotive force engine equal evaporation example exerted expands experiment fire flask foot pounds force arm fruit press fulcrum gases glass gram hot-water induced current iron jackscrew Joule's law lamp latent heat Leclanché cell lens lever lines of force liquid magnetic lines measure mercury metal meter molecules motor moves north pole object Ohm's law ohms Pascal's law passes pipe piston placed plate poundals pressure produced radiation rays resistance screw shown in Fig sound south pole square inch steam stove stroke substance surface tank temperature thermometer tube turned vacuum valve velocity vibration volts volume warmed watts waves weight arm wire