BTEC Applied Science Unit 5 physics
What are the standard units of mass, length and time? - Correct answer-Kilograms,
metres and seconds
What are the SI prefixes for 10^3, 10^6 and 10^9? - Correct answer-kilo, mega, giga
What are the SI prefixes for 10^-3, 10^-6 and 10^-9? - Correct answer-milli, micro, nano
What is work done? - Correct answer-The energy transferred in moving something
What is power? - Correct answer-the rate at which work is done
What happens to a gas when it is compressed? - Correct answer-Particles get closer
together
Gas pressure increases
More collisions between particles and container
Temperature of gas rises
How do you calculate work done from a P-V graph? - Correct answer-The area under
the graph
What is efficiency? - Correct answer-the percentage of the work input that becomes
useful work output
What is thermal equilibrium? - Correct answer-when two objects have the same
temperatures and net heat transfer is zero
What is the first law of thermodynamics? - Correct answer-The change in a system's
internal energy is equal to the difference between heat added to the system from its
surroundings and work done by the system on its surroundings
What are ideal gases? - Correct answer-All collisions are elastic
All motion is random
There are no forces between particles
What is absolute zero? - Correct answer-0 K
Particles have 0 kinetic energy
What is the second law of thermodynamics? - Correct answer-Heat will not flow from a
colder body to a hotter one without an input of work. A natural process cannot fully be
reversed.
What are the standard units of mass, length and time? - Correct answer-Kilograms,
metres and seconds
What are the SI prefixes for 10^3, 10^6 and 10^9? - Correct answer-kilo, mega, giga
What are the SI prefixes for 10^-3, 10^-6 and 10^-9? - Correct answer-milli, micro, nano
What is work done? - Correct answer-The energy transferred in moving something
What is power? - Correct answer-the rate at which work is done
What happens to a gas when it is compressed? - Correct answer-Particles get closer
together
Gas pressure increases
More collisions between particles and container
Temperature of gas rises
How do you calculate work done from a P-V graph? - Correct answer-The area under
the graph
What is efficiency? - Correct answer-the percentage of the work input that becomes
useful work output
What is thermal equilibrium? - Correct answer-when two objects have the same
temperatures and net heat transfer is zero
What is the first law of thermodynamics? - Correct answer-The change in a system's
internal energy is equal to the difference between heat added to the system from its
surroundings and work done by the system on its surroundings
What are ideal gases? - Correct answer-All collisions are elastic
All motion is random
There are no forces between particles
What is absolute zero? - Correct answer-0 K
Particles have 0 kinetic energy
What is the second law of thermodynamics? - Correct answer-Heat will not flow from a
colder body to a hotter one without an input of work. A natural process cannot fully be
reversed.
