Question Details

(solution) Could you please explain each question as clearly as possible


Could you please explain each question as clearly as possible please? Thank you! 


Sample'Questions'for'Exam'1'

 

!

 

1.!Estimation:!!Some!people!think!that!it!is!implausible!that!humans!can!be!affecting!the!

 

amount!of!CO2!in!the!atmosphere!because!the!atmosphere!is!so!big!and!we!are!so!small.!

 

The!total!mass!of!the!atmosphere!is!very!large!?!about!5!x!1018!kg.!But!CO2!is!a!fairly!small!

 

fraction!of!this!?!about!6!x!10G4!of!its!mass.!According!to!the!website!on!carbon!footprints,1!

 

the!average!amount!of!CO2!produced!by!a!person!in!the!US!is!about!20!metric!tons!per!

 

person!per!year.!(One!metric!ton!is!103!kg.)!If!every!person!in!the!world!produced!this!

 

much!CO2!every!year,!how!long!would!it!take!to!increase!the!amount!of!CO2!in!the!

 

atmosphere!by!20%?!(This!is!oversimplified,!but!gives!us!a!reasonable!idea!of!whether!it!is!

 

at!all!plausible!that!human!produced!CO2!can!be!significant.)!Be!sure!to!clearly!state!your!

 

assumptions!and!how!you!came!to!the!numbers!you!estimated,!since!grading!on!this!problem!

 

will!be!mostly!based!on!your!reasoning,!not!on!your!answer.!

 

!

 

!

 

!

 

!

 

!

 

!

 

!

 

!

 

!

 

2.!Dimensional'Analysis:!!When!an!object!is!traveling!in!a!circle,!it!requires!a!force!to!keep!

 

it!turning!since!the!velocity!vector!changes!direction.!That!force!depends!on!the!following!

 

parameters!and!variables:!the!object?s!mass,!m,!the!distance!the!object!is!from!the!center!of!

 

the!circle,!R,!and!the!angular!velocity!of!the!object,!v!(the!angular!velocity!has!dimension!of!

 

1/Time!as!noted!below).!!!

 

A!force!has!dimensions,![F]!=!ML/T2.!!If!our!parameters!and!variables!have!the!following!

 

dimensions,!![m]!=!M,![R]!=!L,!and![v]!=!1/T,!propose'a'possible'equation'for'F'that'

 

expresses'the'way'it'could'depend'on'm,*R,'and'v.'

 

'

 

!

 

! 3.!Kinematics:!A!toy!car!can!move!to!the!right!or!left!along!a!horizontal!line!(the!positive!

 

part!of!the!xGaxis)!as!shown!on!the!left.!In!the!figure!at!the!right!are!shown!a!number!of!

 

different!graphs!as!a!function!of!time!but!they!do!not!specify!what!is!being!plotted!on!the!

 

vertical!axis!(abscissa).!

 

!

 

!

 

!

 

!

 

!

 

!

 

! !

 

!

 

For!the!motions!indicated,!in!the!column!labeled!?position?,!put!the!letter!of!one!graph!that!

 

could!represent!the!position!of!the!car!if!the!vertical!axis!were!position.!In!the!column!

 

labeled!?velocity?,!put!the!letter!of!one!graph!that!could!represent!the!velocity!of!the!car!if!

 

the!vertical!axis!were!velocity.!In!the!column!labeled!?acceleration?,!put!the!letter!of!one!

 

graph!that!could!represent!the!acceleration!of!the!car!if!the!vertical!axis!were!acceleration.!

 

If'you'think'that'no'graph'is'correct,!sketch!a!graph!you!think!would!work.!!In!the!last!

 

column!put!Y!or!N!depending!on!whether!the!3!graphs!you!chose!for!that!row!represent!the!

 

same!motion!or!do!not.!(There!might!be!a!number!of!different!motions!that!are!described!

 

by!the!words!in!each!row.)!

 

!

 

!

 

Position! Velocity! Acceleration! Consistent?!

 

1.1 A!car!that!is!moving!in!reverse! !

 

!

 

!

 

!

 

and!continually!reducing!its!

 

speed.!

 

!

 

1.2 A!car!that!is!speeding!up,!then! !

 

!

 

!

 

!

 

slowing!down.!

 

!

 

!

 

!

 

! 4.!Dynamics:!!!

 

!

 

A!rope!connected!to!the!lower!box!in!a!twoGbox!stack!is!pulling!on!the!combination.!Ignore!

 

air!resistance.!When!they!move,!the!boxes!move!together.!!!

 

1a'(5'pts)!Under!which!of!following!situations!is!there!a!

 

friction!force!of!the!dashed!box!acting!on!the!solid!color!box?!!

 

Give'all'the'answers'for'which'this'friction'force'is'nonF

 

zero.''

 

A. The!string!is!being!pulled!but!the!boxes!are!not!

 

moving.!

 

B. The!string!is!being!pulled!and!the!boxes!are!

 

speeding!up!together.!

 

C. The!string!is!being!pulled!and!the!boxes!are!

 

moving!at!a!constant!speed.!

 

D. In!none!of!these!situations.!

 

!

 

1b'(5'pts)!For!the!answer!you!chose!in!part!1e,!indicate!the!direction!of!the!friction!force!

 

the!dashed!box!is!exerting!on!the!solid!color!box.!

 

!

 

A. It?s!to!the!left!in!all!the!situations!I!chose!in!1e.!

 

B. It?s!to!the!right!in!all!the!situations!I!chose!in!1e.!

 

C. It?s!to!the!right!in!some!of!the!situations!and!to!the!left!in!others.!

 

D. It?s!always!0.!

 

!

 

!

 

!

 

!

 

!

 

!

 

5.!Essay'Question:!!Two!students!were!discussing!a!problem!in!which!the!class!was!asked!

 

to!find!the!acceleration!of!a!cart!rolling!up!and!down!an!incline!at!the!instant!the!cart!was!at!

 

the!very!top!of!its!path.!!Malia!says,!?At!the!top!the!velocity!has!to!be!zero!so!the!

 

acceleration!has!to!be!zero!too.?!!Sasha!disagrees!saying,!?No,!the!velocity!is!changing!at!the!

 

top!so!the!acceleration!can?t!be!zero.?!!Who!do!you!agree!with?!!Discuss!the!reason!for!your!

 

answer!and!explain!why!the!one!who!is!wrong!might!legitimately!be!confused!about!which!

 

answer!is!correct.!Note:!!This!is!an!essay!question.!!Your!answer!will!be!judged!not!solely!on!

 

its!correctness,!but!for!its!depth,!coherence,!and!clarity.!

 

!

 


Solution details:

Pay using PayPal (No PayPal account Required) or your credit card . All your purchases are securely protected by .
SiteLock

About this Question

STATUS

Answered

QUALITY

Approved

DATE ANSWERED

Sep 13, 2020

EXPERT

Tutor

ANSWER RATING

GET INSTANT HELP/h4>

We have top-notch tutors who can do your essay/homework for you at a reasonable cost and then you can simply use that essay as a template to build your own arguments.

You can also use these solutions:

  • As a reference for in-depth understanding of the subject.
  • As a source of ideas / reasoning for your own research (if properly referenced)
  • For editing and paraphrasing (check your institution's definition of plagiarism and recommended paraphrase).
This we believe is a better way of understanding a problem and makes use of the efficiency of time of the student.

NEW ASSIGNMENT HELP?

Order New Solution. Quick Turnaround

Click on the button below in order to Order for a New, Original and High-Quality Essay Solutions. New orders are original solutions and precise to your writing instruction requirements. Place a New Order using the button below.

WE GUARANTEE, THAT YOUR PAPER WILL BE WRITTEN FROM SCRATCH AND WITHIN A DEADLINE.

Order Now