Conversations on Natural Philosophy: In which the Elements of that Science are Familiarly Explained, and Adapted to the Comprehension of Young Pupils. Illustrated with Plates |
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Page 81
... sun . Thus situated , the angle will represent both the centrifugal and centripetal forces ; and if you draw it round the fixed point , you will see how the direction of the centrifugal force varies , constantly form- ing a tangent to ...
... sun . Thus situated , the angle will represent both the centrifugal and centripetal forces ; and if you draw it round the fixed point , you will see how the direction of the centrifugal force varies , constantly form- ing a tangent to ...
Page 82
... sun , the direction of its projectile force is no longer perpendicular to that of attraction , but inclines more ... round the sun in a circle . Mrs. B. No , all the circumstances do not agree . In motion round a centre , you ...
... sun , the direction of its projectile force is no longer perpendicular to that of attraction , but inclines more ... round the sun in a circle . Mrs. B. No , all the circumstances do not agree . In motion round a centre , you ...
Page 83
... sun , and retarded as it recedes from it . Mrs. B. It is mathematically demonstrable , that , in moving round a point towards which it is attracted , a body passes over equal areas in equal times . The whole of the space contained ...
... sun , and retarded as it recedes from it . Mrs. B. It is mathematically demonstrable , that , in moving round a point towards which it is attracted , a body passes over equal areas in equal times . The whole of the space contained ...
Page 84
... sun , and it is during the severity of winter , that it approaches nearest to it . Emily . That is very ... round the sun is the result of the same causes , and is performed in the same manner as that of the earth . Caroline . Pray ...
... sun , and it is during the severity of winter , that it approaches nearest to it . Emily . That is very ... round the sun is the result of the same causes , and is performed in the same manner as that of the earth . Caroline . Pray ...
Page 85
... round the sun ; and the fixed stars as other suns , each of them attended by their re- spective system of planets , to which they impart their in- fluence . We have brought our telescopes to such a de- gree of perfection , that from the ...
... round the sun ; and the fixed stars as other suns , each of them attended by their re- spective system of planets , to which they impart their in- fluence . We have brought our telescopes to such a de- gree of perfection , that from the ...
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Common terms and phrases
angle appear astronomy atmosphere attraction of cohesion axis ball called camera obscura Caroline centre of gravity centrifugal force circle cohesive attraction concave mirror consequently convex mirror dark degrees diminished direction distance diurnal motion earth eclipse effect elastic Emily equal equator explain figure fixed stars fluid focus force fulcrum geometry glass globe greater heat illustrated lens less lever liquids mechanical power mercury meridian moon motion move Natural Philosophy nature object obliquely observe opaque body opposite orbit particles pass pendulum perpendicular planets plate poles pressure produced proportion pulley pump rays fall rays of light reflected rays reflecting telescope refraction represents resistance retina revolve round right line rise round the sun shadow shines side situated solar solid bodies sonorous body sound space specific gravity sphere spring sun's rays suppose surface tides tion tube understand vapor velocity vibrations weight whilst wind