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4 Unsolved Questions on General Physics | PHYS 111, Quizzes of Physics

Material Type: Quiz; Professor: Collins; Class: General Physics-GTSC1; Subject: Physics; University: Mesa State College; Term: Fall 2008;

Typology: Quizzes

Pre 2010

Uploaded on 08/18/2009

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12 November 2008 Phys 111 Fall 2008
Question 1
A block of aluminum of mass 0.5kg is
placed into contact with a block of copper of
mass 1.0kg.The initial temperature of the
aluminum is 90C and that of the copper is
20C.
As time passes which of the following is true?
1. QAl >0and QCu >0
2. QAl >0and QCu <0
3. QAl <0and QCu >0
4. QAl <0and QCu <0
Typeset by FoilT
E
X 1
pf3
pf4

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Phys 111 Fall 2008

Question 1

block

of

aluminum

of

mass

(^) kg

is

(^) kg . The initial temperature of the

◦ C and that of the copper is

◦ C .

1.^ As time passes which of the following is true? Q Al (^) > (^0) (^) and

(^) Q Cu (^) > (^0)

Q

Al (^) > (^0) (^) and

(^) Q Cu (^) < (^0)

Q

Al (^) < (^0) (^) and

(^) Q Cu (^) > (^0)

Q

Al (^) < (^0) (^) and

(^) Q Cu (^) < (^0)

TEX

(^) –

Phys 111 Fall 2008

Question 2

block

of

aluminum

of

mass

(^) kg

is

(^) kg . The initial temperature of the

◦ C and that of the copper is

◦ C .

1.^ As time passes which of the following is true? ∆ U Al (^) > (^0) (^) and

(^) ∆ U Cu (^) > (^0)

U

Al (^) > (^0) (^) and

(^) ∆ U Cu (^) < (^0)

U

Al (^) < (^0) (^) and

(^) ∆ U Cu (^) > (^0)

U

Al (^) < (^0) (^) and

(^) ∆ U Cu (^) < (^0)

TEX

(^) –

Phys 111 Fall 2008

Question 4

block

of

aluminum

of

mass

(^) kg

is

(^) kg . The initial temperature of the

◦ C and that of the copper is

◦ C .

Suppose that

(^) J of heat flows from the

aluminum into the copper.

Which of the

  1. in each case.following is true for the change in entropies ∆ S Al (^) is positive,

S

Cu (^) is positive.

S

Al (^) is negative,

S

Cu (^) is positive.

S

Al (^) is positive,

S

Cu (^) is negative.

S

Al (^) is negative,

S

Cu (^) is negative.

TEX

(^) –