PHYS 131 FINAL EXAM REVIEW - CONCEPTS QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW
The momentum of a truck is increased by a factor of 2; its weight does not change. Thus, -
ANSWER-Its speed is doubled
If the speed of an object is doubled its kinetic energy is multiplied by - ANSWER-4
Increasing the mass of an object without changing its velocity - ANSWER-Increases its
momentum and its kinetic energy
The lowest temperature possible in nature is - ANSWER--273 degrees C
Water freezes at ______ and boils at ______ - ANSWER-0 degrees C, 100 degrees C
When, if possible can heat be added to a substance without changing its temperature? -
ANSWER-When it undergoes a phase change
After working hard outside on a hot summer day, placing a towel soaked in cold water on your
head can feel very good. The reason the towel feels cold to you is that - ANSWER-Heat conducts
from your head to the towel, lowering your temperature
Heat is sometimes lost from a house through cracks around windows and doors. What
mechanism of heat transfer is involved? - ANSWER-Convection
How do we get heat from the sun through the freezing empty space between the sun and earth?
- ANSWER-Raidation
, Good conductors are _____, good insulators are ___ - ANSWER-metal, air
Systems alone tend to move toward a state of - ANSWER-more entropy
The First Law of Thermodynamics - ANSWER-The increase in the thermal energy of a system is
equal to the amount of heat added to a system minus the amount of work done by the system
The Second Law of Thermodynamics - ANSWER-Heat will not flow spontaneously from a cold
object to a hot object
Every heat engine - ANSWER-Gains heat from a high-temperature reservoir
Converts energy into mechanical work
Expels heat to a lower-temperature reservoir
A fundamental rule of electricity is that - ANSWER-Like kinds of charges repel
Unlike kinds of charges attract
To become a positive ion, an atom must - ANSWER-Lose an electron
A main difference between gravitational and electric forces is that electric forces - ANSWER-
Repel or attract
When the distance between two charges is halved, the electrical force between them -
ANSWER-Quadruples
Which of these types of engines is a heat engine
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW
The momentum of a truck is increased by a factor of 2; its weight does not change. Thus, -
ANSWER-Its speed is doubled
If the speed of an object is doubled its kinetic energy is multiplied by - ANSWER-4
Increasing the mass of an object without changing its velocity - ANSWER-Increases its
momentum and its kinetic energy
The lowest temperature possible in nature is - ANSWER--273 degrees C
Water freezes at ______ and boils at ______ - ANSWER-0 degrees C, 100 degrees C
When, if possible can heat be added to a substance without changing its temperature? -
ANSWER-When it undergoes a phase change
After working hard outside on a hot summer day, placing a towel soaked in cold water on your
head can feel very good. The reason the towel feels cold to you is that - ANSWER-Heat conducts
from your head to the towel, lowering your temperature
Heat is sometimes lost from a house through cracks around windows and doors. What
mechanism of heat transfer is involved? - ANSWER-Convection
How do we get heat from the sun through the freezing empty space between the sun and earth?
- ANSWER-Raidation
, Good conductors are _____, good insulators are ___ - ANSWER-metal, air
Systems alone tend to move toward a state of - ANSWER-more entropy
The First Law of Thermodynamics - ANSWER-The increase in the thermal energy of a system is
equal to the amount of heat added to a system minus the amount of work done by the system
The Second Law of Thermodynamics - ANSWER-Heat will not flow spontaneously from a cold
object to a hot object
Every heat engine - ANSWER-Gains heat from a high-temperature reservoir
Converts energy into mechanical work
Expels heat to a lower-temperature reservoir
A fundamental rule of electricity is that - ANSWER-Like kinds of charges repel
Unlike kinds of charges attract
To become a positive ion, an atom must - ANSWER-Lose an electron
A main difference between gravitational and electric forces is that electric forces - ANSWER-
Repel or attract
When the distance between two charges is halved, the electrical force between them -
ANSWER-Quadruples
Which of these types of engines is a heat engine
