Define the term ultrasound wave
An ultrasound wave is a soundwave with a frequency higher than 20,000 Hz
RA
Related Physics GCSE answers
All answers ▸According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?
What is cosmic microwave background, and where does it come from?
Why are transformers used in the National Grid?
Alice and Bob are sat on a seesaw. The seesaw is in static equilibrium. Alice weighs 500N and is sat 0.5m to the left of the pivot. If Bob weighs 800N, how far from the pivot on the right is he sat? What happens if Bob moves closer to the pivot?