W h i c h o f t h e f o l l o w i n g s t a t e m e n t s b e s t e x p l a i n s w h y t h e m a g n e t i c f l u x t h r o u g h a c l o s e d s u r f a c e i s z e r o ? a. M a g n e t i c f i e l d l i n e s d o n o t a l w a y s c l o s e o n t h e m s e l v e s. b. I s o l a t e d m a g n e t i c m o n o p o l e s d o n o t e x i s t. c. T h e v e c t o r a r e a e l e m e n t i s p e r p e n d i c u l a r t o t h e ma g n e t i c f i e l d v e c t o r.

W h i c h o f t h e f o l l o w i n g s t a t e m e n t s b e s t e x p l a i n s w h y t h e m a g n e t i c f l u x t h r o u g h a c l o s e d s u r f a c e i s z e r o ? a. M a g n e t i c f i e l d l i n e s d o n o t a l w a y s c l o s e o n t h e m s e l v e s. b. I s o l a t e d m a g n e t i c m o n o p o l e s d o n o t e x i s t. c. T h e v e c t o r a r e a e l e m e n t i s p e r p e n d i c u l a r t o t h e ma g n e t i c f i e l d v e c t o r.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter11: Angular Momentum

Section: Chapter Questions

Problem 74P: Neptune has a mass of 1.01026kg and is 4.5109km from the Sun with an orbital period of 165 years....

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W h i c h o f t h e f o l l o w i n g s t a t e m e n t s C O R R E C T L Y de s c r i b e / s e l e c t r o s t a t i c and i n d u c e d e l e c t r i c f i e l d s ? i. E l e c t r o s t a t i c f i e l d s a n d i n d u c e d e l e c t r i c f i e l d s a r e b o t h c o n s e r v a t i v e f i e l d s. i i. W h e n a c h a r g e m o v e s a r o u n d a c l o s e d l o o p i n a n e l e c t r o s t a t i c f i e l d , t h e f i e l d w i l l d o n o n - z e r o w o r k . i i i . T h e r e i s n o p o t e n t i a l f u n c t i o n c o r r e s p o n d i n g t o a n i n d u c e d e l e c t r i c f i e l d . a. I a n d I I o n l y b. I I a n d I I I o n l y c. I I I o n l y d. I , I I a n d I I I
6. T w o f o r c e s w h i c h a r e e q u a l i n m a g n i t u d e a c t o n a b o d y . T o k e e p t h e b o d y i n e q u i l i b r i u m , a t h i r d f o r c e w h i c h is e q u a l in m a g n i t u d e to e a c h of the t w o f o r c e s i s r e q u i r e d. What is the angle between the two forces?
24. T h e w e i g h t o f a u n i f o r m l a d d e r 1 3 f e e t l o n g i s 150 N. I t i s p l a c e d a g a i n s t a s m o o th w a l l s o t h a t i t s l o w e r e n d i s a t a d i s t a n c e o f 5 feet f r o m t h e w a l l . A m a n w e i g h i n g 490 N s t a n d s o n t h e l a d d e r a t a p o i n t 3 feet from the upper end. (a) F I n d t h e f o r c e w h i c h t h e l a d d e r e x e r t s a g a i n s t t h e w a l l a n d ( b ) f i n d the horizontal and vertical components of the force exerted by the ladder on the floor.
C o n s i d e r t w o p o i n t c h a r g e s w i t h e q u a l c h a r g e Q a t ( a , a ) a n d ( − a , a ) , a n d a s e m i c i r c u l a r c h a r g e c e n t e r e d a t t h e o r i g i n w i t h r a d i u s a a n d l i n e a r c h a r g e d e n s i t y λ a s s h o w n . I f , a t t h e o r i g i n , t h e f i e l d d u e t o t h e p o i n t c h a r g e s c a n c e l s o u t t h e f i e l d d u e t o t h e s e m i c i r c u l a r r i n g , w h a t s h o u l d b e t h e c h a r g e d e n s i t y o f t h e r i n g ?
20. A t t h e i n s t a n t a t r u c k i s t r a v e l l i n g a l o n g a l e v e l p a v e m e n t at 20 m/s, a w o o d e n c ra te f a l l s f r o m t h e t r u c k . I f t h e c r a t e t r a v e l s 40 meters b e f o r e c o m i n g t o r e s t , w h a t i s t h e c o e f f i c i e n t of k i n e t i c f r i c t i o n b e t w e e n t h e c r a t e a n d t h e r o a d ?
T w o m a s s e s 6.0 kg and 9.0 kg a r e h u n g f r o m t h e t w o e n d s o f a c o r d w h i c h p a s s e s o v e r a s m o o t h p u l l e y s o t h at t h e t w o m a s s e s h a n g f r e e l y . I f i n i t i a l l y t h e 9.0 kg m a s s is 4 meters from the floor, how long will it take this mass to reach the floor after the masses are released?
14. A u n i f o r m b a r w e i g h i n g 60 N h a s a l e n g t h o f 4 m a n d i s s u p p o r t e d a t i t s e n d b y st r i n g s. A l o a d W=200N i s pl a c e d a t s o m e p o i n t o n t h e b a r s u c h t h a t i t i s i n e q u i l i b r i u m w h e n t h e t e n s i o n i n t h e s t r i n g a t t he l e f t e n d is 80N. (a) L o c a t e t h e p o s i t i o n of W, (b) f i n d t h e te n s i o n i n t h e s t r i n g a t t h e r i g h t e nd .
T h e n e t f o r c e o n a 2-kg b o d y i s 6 N. I f t h e b o d y i s o r i g i n a l l y t r a v e l l i n g w i t h a v e l o c i t y o f 8 m/s, a n d i f t h e f o r c e a p p l i e d i s o p p o s i t e t o t h e v e l o c i t y , f i n d t h e d i s t a n c e i t w i l l m o v e b e f o r e c o m i n g t o r e s t .
16. T h e c e n t e r o f g r a v i t y o f a n o n - u n i f o r m b am b o o p o l e o f l e n g t h 3m is 1m f r o m i t s l a r g e r e n d a n d i t s w e i g h t i s 50 Newton. I f i t i s t o b e s u p p o r t e d a t i t s m i d p o i n t , w h a t v e r t i c a l f or c e mu s t b e a p p l i e d a t th e s m a ll er e n d o f th e p o l e t o k e e p i t i n a h or i z o n ta l p os i ti on ?
A s t r i n g a t t a c h e d t o a b o d y o f m a s s 4 kg w h i c h re s t s o n a f r i c t i o n l e s s p l a n e t h a t i s i n c l i n e d 30o w i t h t h e h o r i z o n t a l . T h e s t r i n g p a s s e s o v e r a p u l l e y a t t h e u p p er e n d of the p l a n e a n d a n o t he r b od y o f m a s s 3 kg is attached to the other end of the string, this body hanging vertically. (a) Find the direction and magnitude of the acceleration of the two bodies and (b) the tension in the string.
4̲)̲ ̲W̲h̲i̲c̲h̲ ̲o̲f̲ ̲t̲h̲e̲ ̲f̲o̲l̲l̲o̲w̲i̲n̲g̲ ̲c̲a̲n̲d̲i̲d̲a̲t̲e̲s̲ ̲f̲o̲r̲ ̲w̲a̲v̲e̲f̲u̲n̲c̲t̲i̲o̲n̲s̲ ̲a̲r̲e̲ ̲n̲o̲r̲m̲a̲l̲i̲z̲a̲b̲l̲e̲ ̲o̲v̲e̲r̲ ̲t̲h̲e̲ ̲i̲n̲d̲i̲c̲a̲t̲e̲d̲ ̲i̲n̲t̲e̲r̲v̲a̲l̲s̲?̲ ̲N̲o̲r̲m̲a̲l̲i̲z̲e̲ ̲t̲h̲o̲s̲e̲ ̲n̲o̲r̲m̲a̲l̲i̲z̲a̲b̲l̲e̲.̲ ̲A̲r̲e̲ ̲t̲h̲e̲ ̲o̲t̲h̲e̲r̲ ̲s̲u̲i̲t̲a̲b̲l̲e̲ ̲w̲a̲v̲e̲f̲u̲n̲c̲t̲i̲o̲n̲s̲?
28. T h e u n i f o r m h o r i z o n t a l b e a m i n F i g u r e G. is 6 m lo n g w e i g h s 100 kg force, a n d i s p i v o t e d a t a p o i n t i n t h e w a l l . T h e o t h e r e n d o f t h e b e a m i s s u p p o r t e d b y a r o p e w h i c h m a k e s 30o with the horizontal. F i n d ( a ) t h e t e n s i o n i n t h e r o p e a n d ( b ) t h e v e r t i c a l and horizontal components of the force exerted by the wall at the pivot.