First law of thermodynamics (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What is the equation for the first law of thermodynamics?
What is the equation for the first law of thermodynamics?
What does represent in the first law?
What does represent in the first law?
Energy added via heating or cooling
What does indicate?
What does indicate?
Particles are gaining energy
What does internal energy include?
What does internal energy include?
Kinetic & potential energy of particles
What is the sign of when a gas expands?
What is the sign of when a gas expands?
Positive
What is the sign of when a gas is compressed?
What is the sign of when a gas is compressed?
Negative
What defines a closed system?
What defines a closed system?
No gas enters/leaves; energy can transfer
Which is an example of a closed system?
Which is an example of a closed system?
A balloon with fixed air inside
What does positive indicate?
What does positive indicate?
Energy enters the system
During exercise, what happens to the body's internal energy if not replenished?
During exercise, what happens to the body's internal energy if not replenished?
Decreases