Heat and Temperature: More Practice
More practice on heat transfer and the particle model, for once the required set is done.
8 questions, free, marked as you go with a worked explanation on every one.
What this covers
- heat and temperature
The questions
- A glass jar with a metal lid feels stuck shut after being in the fridge. Running the lid under hot water helps it open because the metal:
- A steel rod extends by 0.45 mm per metre of its length for every 30 degrees Celsius it warms. A 20 metre rod warms by 30 degrees Celsius. How much longer, in millimetres, is the whole rod?
- Which correctly describes the currents inside a pot of soup heated from below?
- A beaker of water cools from 90 degrees Celsius to 60 degrees Celsius over 15 minutes. What is the average rate of cooling, in degrees Celsius per minute?
- You feel the heat of a bonfire on your face without touching it or standing in its rising air. This heat reached you by:
- Use the table. Four materials were wrapped around identical warm cans for ten minutes. Which was the best insulator?
- It takes 4.2 joules to raise the temperature of one gram of water by one degree Celsius. How many kilojoules does it take to heat 500 grams of water by 20 degrees Celsius?
- A thermos has a sealed vacuum layer between its two walls. What does the vacuum layer mainly block?