( v = 50 \times 0.2 = 10 , \textm/s )

( v = f \lambda )

Before you keep looking, here are a few things to keep in mind:

Before diving into answer keys, let’s contextualize the textbook. Physics at Work (often published by Oxford University Press or similar educational publishers) is a two-volume series designed for secondary school physics. typically covers the following core topics:

An answer key doesn’t just give the right number—it reveals where you went wrong. Here are the top 3 errors found in Book 2 problem sets:

You might find Google Drive links or file-sharing sites claiming to have the complete answer key. Be cautious—they may be outdated, full of errors, or even contain malware. Plus, using them to skip the learning process usually backfires in exams.

Ask your school’s physics department. Many schools purchase these and can share relevant sections with students for study purposes.

A gas occupies 2.0 L at a pressure of 101 kPa. If the temperature is constant and the pressure is increased to 202 kPa, what is the new volume?