Physics
Fluid-Mechanics
Easy

Question

T h e space r a t i o space o f space s u r f a c e space t e n s i o n s space o f space m e r c u r y space a n d space w a t e r space i s space g i v e n space t o space b e space 7.5 space w h i l e space t h e space r a t i o space o f space t h e i r space d e n s i t i e s space i s space 13.6. space
T h e i r space c o n t a c t space a n g l e s comma space w i t h space g l a s s comma space a r e space c l o s e space t o space 135 degree space a n d space 0 degree comma space r e s p e c t i v e l y. space I t space i s space o b s e r v e d space t h a t space m e r c u r y space g e t s space
d e p r e s s e d space b y space a n space a m o u n t space h space i n space a space c a p i l l a r y space t u b e space o f space r a d i u s space r subscript 1 comma space w h i l e space w a t e r space r i s e s space b y space t h e space s a m e space a m o u n t space h space i n space a space
c a p i l l a r y space t u b e space o f space r a d i u s space r subscript 2. space T h e space r a t i o space left parenthesis r subscript 1 divided by r subscript 2 right parenthesis comma space i s space t h e n space c l o s e space t o space colon

  1. 2/3
  2. 4/5
  3. 2/5
  4. 3/5

The correct answer is: 2/5

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Y o u n g apostrophe s space m o d u l i space o f space t w o space w i r e s space A space a n d space B space a r e space i n space t h e space r a t i o space 7 space colon space 4. space W i r e space A space i s space 2 space m space l o n g space a n d space h a s space r a d i u s space R. space W i r e space B space i s space 1.5 space m space l o n g space a n d space h a s space r a d i u s space 2 space m m. space I f space t h e space t w o space
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Y o u n g apostrophe s space m o d u l i space o f space t w o space w i r e s space A space a n d space B space a r e space i n space t h e space r a t i o space 7 space colon space 4. space W i r e space A space i s space 2 space m space l o n g space a n d space h a s space r a d i u s space R. space W i r e space B space i s space 1.5 space m space l o n g space a n d space h a s space r a d i u s space 2 space m m. space I f space t h e space t w o space
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A space s t e e l space w i r e space h a v i n g space a space r a d i u s space o f space 2.0 space m m comma space c a r r y i n g space a space l o a d space o f space 4 space k g comma space i s space h a n g i n g space f r o m space a space c e i l i n g. space G i v e n space t h a t space straight g equals 3.1 pi ms to the power of negative 2 end exponent comma space
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w h a t space w i l l space b e space t h e space t e n s i l e space s t r e s s space t h a t space w o u l d space b e space d e v e l o p e d space i n space t h e space w i r e ?

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A space b o y ’ s space c a t a p u l t space i s space m a d e space o f space r u b b e r space c o r d space w h i c h space i s space 42 space c m space l o n g comma space w i t h space 6 space m m space d i a m e t e r space o f space c r o s s minus s e c t i o n space a n d space o f space n e g l i g i b l e space space m a s s. space
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t h e space s t o n e space f l i e s space o f f space w i t h space a space v e l o c i t y space o f space 20 space m s to the power of negative 1 end exponent. space N e g l e c t space t h e space c h a n g e space i n space t h e space a r e a space o f space c r o s s minus s e c t i o n space o f space t h e space c o r d space w h i l e space s t r e t c h e d. space
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t h e space s t o n e space f l i e s space o f f space w i t h space a space v e l o c i t y space o f space 20 space m s to the power of negative 1 end exponent. space N e g l e c t space t h e space c h a n g e space i n space t h e space a r e a space o f space c r o s s minus s e c t i o n space o f space t h e space c o r d space w h i l e space s t r e t c h e d. space
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left parenthesis d e n s i t y space o f space w a t e r space equals space 1000 space k g divided by m cubed comma space c o e f f i c i e n t space o f space v i s cos i t y space o f space w a t e r space equals space 1 space m P a space s right parenthesis space

W a t e r space f r o m space a space p i p e space i s space c o m i n g space a t space a space r a t e space o f space 100 space l i t e r s space p e r space m i n u t e. space I f space t h e space r a d i u s space o f space
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left parenthesis d e n s i t y space o f space w a t e r space equals space 1000 space k g divided by m cubed comma space c o e f f i c i e n t space o f space v i s cos i t y space o f space w a t e r space equals space 1 space m P a space s right parenthesis space

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A space t e s t space p a r t i c l e space i s space m o v i n g space i n space a space c i r c u l a r space o r b i t space i n space t h e space g r a v i t a t i o n a l space f i e l d space p r o d u c e d space b y space a space m a s s space d e n s i t y space rho left parenthesis straight r right parenthesis equals straight K over straight r squared. space space I d e n t i f y space
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A space t e s t space p a r t i c l e space i s space m o v i n g space i n space a space c i r c u l a r space o r b i t space i n space t h e space g r a v i t a t i o n a l space f i e l d space p r o d u c e d space b y space a space m a s s space d e n s i t y space rho left parenthesis straight r right parenthesis equals straight K over straight r squared. space space I d e n t i f y space
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h a s space t o space b e space m o v e d space t o space A apostrophe space s u c h space t h a t space OA to the power of straight prime equals 27 cm comma space t o space g e t space i t s space i n v e r t e d space r e a l space i m a g e space a t space A apostrophe space i t s e l f. space T h e space v a l u e space
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A space t h i n space c o n v e x space l e n s space L space left parenthesis r e f r a c t i v e space i n d e x space equals 1.5 right parenthesis space i s space p l a c e d space o n space a space p l a n e space m i r r o r space M. space W h e n space a space p i n space i s
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h a s space t o space b e space m o v e d space t o space A apostrophe space s u c h space t h a t space OA to the power of straight prime equals 27 cm comma space t o space g e t space i t s space i n v e r t e d space r e a l space i m a g e space a t space A apostrophe space i t s e l f. space T h e space v a l u e space
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A space s t r i n g space i s space c l a m p e d space a t space b o t h space t h e space e n d s space a n d space i t space i s space v i b r a t i n g space i n space i t s space 4 to the power of t h end exponent space h a r m o n i c. space T h e space
e q u a t i o n space o f space t h e space s t a t i o n a r y space w a v e space i s space Y equals 0.3 sin left parenthesis 0.157 x right parenthesis cos left parenthesis 200 pi t right parenthesis space. space T h e space l e n g t h space o f space
t h e space s t r i n g space i s space colon space left parenthesis A l l space q u a n t i t i e s space a r e space i n space S I space u n i t s. right parenthesis

A space s t r i n g space i s space c l a m p e d space a t space b o t h space t h e space e n d s space a n d space i t space i s space v i b r a t i n g space i n space i t s space 4 to the power of t h end exponent space h a r m o n i c. space T h e space
e q u a t i o n space o f space t h e space s t a t i o n a r y space w a v e space i s space Y equals 0.3 sin left parenthesis 0.157 x right parenthesis cos left parenthesis 200 pi t right parenthesis space. space T h e space l e n g t h space o f space
t h e space s t r i n g space i s space colon space left parenthesis A l l space q u a n t i t i e s space a r e space i n space S I space u n i t s. right parenthesis

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I f space M space i s space t h e space m a s s space o f space w a t e r space t h a t space r i s e s space i n space a space c a p i l l a r y space t u b e space o f space r a d i u s space apostrophe r apostrophe comma space t h e n
m a s s space o f space w a t e r space w h i c h space w i l l space r i s e space i n space a space c a p i l l a r y space t u b e space o f space r a d i u s space apostrophe 2 r apostrophe space i s space colon

I f space M space i s space t h e space m a s s space o f space w a t e r space t h a t space r i s e s space i n space a space c a p i l l a r y space t u b e space o f space r a d i u s space apostrophe r apostrophe comma space t h e n
m a s s space o f space w a t e r space w h i c h space w i l l space r i s e space i n space a space c a p i l l a r y space t u b e space o f space r a d i u s space apostrophe 2 r apostrophe space i s space colon

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T h e space f o l l o w i n g space b o d i e s space a r e space m a d e space t o space r o l l space u p space left parenthesis w i t h o u t space s l i p p i n g right parenthesis space t h e space s a m e space i n c l i n e d space p l a n e space f r o m space a space h o r i z o n t a l space p l a n e space colon
left parenthesis i right parenthesis space a space r i n g space o f space r a d i u s space R comma space left parenthesis i i right parenthesis space a space s o l i d space c y l i n d e r space o f space r a d i u s space straight R over 2 space a n d space left parenthesis i i i right parenthesis space a space s o l i d space s p h e r e space o f space r a d i u s space straight R over 4 space. space I f comma space i n space e a c h space c a s e comma
space t h e space s p e e d space o f space t h e space c e n t e r space o f space m a s s space a t space t h e space b o t t o m space o f space t h e space i n c l i n e space i s space s a m e comma space t h e space r a t i o space o f space t h e space m a x i m u m space h e i g h t s space t h e y space c l i m b space i s space

T h e space f o l l o w i n g space b o d i e s space a r e space m a d e space t o space r o l l space u p space left parenthesis w i t h o u t space s l i p p i n g right parenthesis space t h e space s a m e space i n c l i n e d space p l a n e space f r o m space a space h o r i z o n t a l space p l a n e space colon
left parenthesis i right parenthesis space a space r i n g space o f space r a d i u s space R comma space left parenthesis i i right parenthesis space a space s o l i d space c y l i n d e r space o f space r a d i u s space straight R over 2 space a n d space left parenthesis i i i right parenthesis space a space s o l i d space s p h e r e space o f space r a d i u s space straight R over 4 space. space I f comma space i n space e a c h space c a s e comma
space t h e space s p e e d space o f space t h e space c e n t e r space o f space m a s s space a t space t h e space b o t t o m space o f space t h e space i n c l i n e space i s space s a m e comma space t h e space r a t i o space o f space t h e space m a x i m u m space h e i g h t s space t h e y space c l i m b space i s space

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A concave lens forms a virtual, upright, and diminished image of an object ____.

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A lens can only form a virtual, upright, and diminished images irrespective of the distance between the lens and the object. It is a ____ lens.

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