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, Ans✓✓✓ Its speed is doubled
If the speed of an object is doubled its kinetic energy is multiplied by
Ans✓✓✓ 4
Increasing the mass of an object without changing its velocity Ans✓✓✓
Increases its momentum and its kinetic energy
The lowest temperature possible in nature is Ans✓✓✓ -273 degrees C
Water freezes at ______ and boils at ______ Ans✓✓✓ 0 degrees C, 100
degrees C
When, if possible can heat be added to a substance without changing its
temperature? Ans✓✓✓ 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 Ans✓✓✓ 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? Ans✓✓✓
Convection
How do we get heat from the sun through the freezing empty space
between the sun and earth? Ans✓✓✓ Raidation
Good conductors are _____, good insulators are ___ Ans✓✓✓ metal, air
Systems alone tend to move toward a state of Ans✓✓✓ more entropy
The First Law of Thermodynamics Ans✓✓✓ 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 Ans✓✓✓ Heat will not flow
spontaneously from a cold object to a hot object
Every heat engine Ans✓✓✓ Gains heat from a high-temperature
reservoir
Converts energy into mechanical work
Expels heat to a lower-temperature reservoir
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, Ans✓✓✓ Its speed is doubled
If the speed of an object is doubled its kinetic energy is multiplied by
Ans✓✓✓ 4
Increasing the mass of an object without changing its velocity Ans✓✓✓
Increases its momentum and its kinetic energy
The lowest temperature possible in nature is Ans✓✓✓ -273 degrees C
Water freezes at ______ and boils at ______ Ans✓✓✓ 0 degrees C, 100
degrees C
When, if possible can heat be added to a substance without changing its
temperature? Ans✓✓✓ 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 Ans✓✓✓ 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? Ans✓✓✓
Convection
How do we get heat from the sun through the freezing empty space
between the sun and earth? Ans✓✓✓ Raidation
Good conductors are _____, good insulators are ___ Ans✓✓✓ metal, air
Systems alone tend to move toward a state of Ans✓✓✓ more entropy
The First Law of Thermodynamics Ans✓✓✓ 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 Ans✓✓✓ Heat will not flow
spontaneously from a cold object to a hot object
Every heat engine Ans✓✓✓ Gains heat from a high-temperature
reservoir
Converts energy into mechanical work
Expels heat to a lower-temperature reservoir
