1. What is the SI unit for length? Answer: Meter 2. Define accuracy in measurements. Answer: Accuracy refers to how close a measurement is to the true value. 3. State the principle of conservation of energy. Answer: Energy cannot be created or destroyed, only transferred or converted from one form to another. 4. What is the unit for acceleration? Answer: meters per second squared (m/s^2) 5. What is the relationship between wavelength and frequency in a wave? Answer: The wavelength is inversely proportional to the frequency. 6. Define the term 'displacement'. Answer: Displacement is the distance and direction of an object's change in position from a starting point. 7. What is the equation for calculating the speed of a wave? Answer: Speed = wavelength x frequency