During an isometric process, 450 J of heat are removed from a trapped gas. Which is true

the temperature of the gas is decreasing

The law of entropy states that

every natural system will tend twoard disorder

In an isothermal process

the internal energy change is zero

Which of the following is true when light enters a denser medium?

v decreases, λ decreases, and n increases

How will the image change as the object moves from 2f to f ?

image will increase in size and move away from the mirror

The first law of thermodynamics is a form of

the law of conservation of energy

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Geometrical Optics

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Physics SAT Prep

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Questions 26

Answers

1
The image formed by the object in the diagram would be
no image forms, ray traces never intersect
virtual and upright
real and inverted
real and upright
2
In an adiabatic process, there is no
change in temperature
heat added or removed
change in internal energy
change in pressure
3
During an isometric process, 450 J of heat are removed from a trapped gas. Which is true
the temperature of the gas is decreasing
Work = 450 J
the temperature of the gas is increasing
The volume of the gas is increasing
4
An engine absorbs 160J of heat and exhausts 120J to a cold reservoir. What is its efficiency?
75%
25%
40%
50%
5
The entropy of isolated systems
remains constant
is zero
inreases
decreases
6
The type of lens that refracts parallel light rays to the far focal point is a
diverging, concave lens
all spherical lenses refract parallel rays to the far focus.
converging, concave lens
converging, convex lens
7
The law of entropy states that
every natural system will tend twoard disorder
heat always flows spontaneously from a cold body to a hot on
every natural system will tend toward lower entropy
heat lost by one object just be gained by another
8
A liquid is in a pan is heated over a flame. The hot liquid begins rising to the top. This is
thermal expansion
conduction
radiation
convection
9
In an isothermal process
the work is zero
the voume change is zero
the internal energy change is zero
the heat added is zero
10
You feel heat as you approach a fire by way of
conduction
thermal expansion
convection
radiation
11
At and beyond the critical angle, all the light striking the boundary between two substances is
refracted
absorbed
reflected
dispersed
12
The average kinetic energy of the molecules in a substance is most closely associated with
potential energy
heat capacity
specific heat
temperature
13
Which of these is a consequence of the second law of thermodynamics?
The entropy of isolated systems always increases
All of these
No heat engine can ever be 100% efficient
The natural direction of heat flow is from hot to cold
14
The object is positioned just inside of the focus. Which correctly describes the image?
Real and upright
Virtual and upright
Real and inverted
No image is formed
15
An image formed by a convex mirror is
none of these
real and inverted
real and upright
virtual and upright
16
Which of the following is true when light enters a denser medium?
v increases, λ decreases, and n increases
v increases, λ decreases, and n decreases
v decreases, λ decreases, and n increases
v decreases, λ increases, and n increases
17
A heat engine operates between 25°C and 100°C. The theoretical efficiency is most nearly
20%
10%
80%
50%
18
How will the image change as the object moves from 2f to f ?
image size remains constant but moves away from the mirror
image will decrease in size and move away from the mirror
image will increase in size and move toward the mirror
image will increase in size and move away from the mirror
19
The first law of thermodynamics is essentially a statment of
entropy
heat transfer
internal energy
conservation of energy
20
When two systems are in thermal equilibrium with each other
heat can be made to flow from system of lower temp to higher
no net heat flow occurs
both A and B
heat flows from system of higher temperature to lower temp
21
An image appearing on a screen after passing through a lens is
real and inverted
none of these
virtual and inverted
real and upright
22
The first law of thermodynamics is a form of
the ideal gas law
the law of conservation of temperature
the law of entropy
the law of conservation of energy
23
Rank the indeces of refraction from greatest to least.
n1 > n3 > n2
n2 > n1 > n3
n3 > n1 > n2
n1 > n2 > n3
24
The image formed by the object in the diagram would be
no image forms, ray traces never intersect
real and inverted
virtual and upright
real and upright
25
An object is 1 m in front of a plane mirror. The image is
virtual, inverted, and 1 m behind the mirror
virtual, upright, and 1 m in front of the mirror
none of the above
real, upright, and 1 m behind the mirror
26
The image formed by the object in the diagram would be
real and inverted
no image forms, ray traces never intersect
virtual and upright
real and upright

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