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BTEC APPLIED SCIENCE UNIT 5 PHYSICS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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BTEC APPLIED SCIENCE UNIT 5 PHYSICS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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BTEC APPLIED SCIENCE UNIT 5PHYSICS QUESTIONS AND ANSWERS
WITH SOLUTIONS 2024
What are the standard units of mass, length and time? - ANSWER Kilograms, metres and seconds
What are the SI prefixes for 10^3, 10^6 and 10^9? - ANSWER kilo, mega, giga
What are the SI prefixes for 10^-3, 10^-6 and 10^-9? - ANSWER milli, micro, nano
What is work done? - ANSWER The energy transferred in moving something
What is power? - ANSWER the rate at which work is done
What happens to a gas when it is compressed? - 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? - ANSWER The area under the graph
What is efficiency? - ANSWER the percentage of the work input that becomes useful work output
What is thermal equilibrium? - ANSWER when two objects have the same temperatures and net heat
transfer is zero
What is the first law of thermodynamics? - 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? - ANSWER All collisions are elastic
All motion is random
There are no forces between particles
What is absolute zero? - ANSWER 0 K
Particles have 0 kinetic energy
What is the second law of thermodynamics? - 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 is an isothermal process? - ANSWER a process that occurs at constant temperature
What is an adiabatic process? - ANSWER no thermal energy is transferred between the system and its
surroundings.
What is the Carnot cycle? - ANSWER an idealised engine cycle
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