Demo. An invented family, made-up minutes, nobody's real child. The quizzes work: pass a round and watch the clock change.

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⚛️ Physics, NCEA

Years 11 to 13 · Read up first

10 questions. Get 8 right to earn 10 minutes. All 10 right = +5 bonus. They start easy and get harder as you go, so treat the first few as a warm-up. Every one you miss comes back with the answer and why.

1. The distance between two successive wave crests is called the

frequencywavelengthperiodamplitude

2. The nucleus of an atom contains

protons and electronsonly protonsonly electronsprotons and neutrons

3. Newton's first law states that an object will remain at rest or move at constant velocity unless

it is touched by another objectit runs out of energygravity stops acting on itacted on by an unbalanced (net) force

4. Refraction is the

bouncing of light off a surfaceabsorption of light by a black surfacebending of light as it passes from one medium into anothersplitting of light into colours only

5. Which quantity describes how fast an object's velocity is changing?

AccelerationDisplacementSpeedMass

6. Newton's second law is summarised by the equation

Force = mass plus accelerationForce = mass times velocityForce = mass times accelerationForce = mass divided by acceleration

7. Light bends towards the normal when it travels from

glass into more glassa more dense medium into a less dense mediumvacuum into vacuuma less dense medium (like air) into a more dense medium (like glass)

8. Momentum is calculated as

mass times velocitymass times accelerationforce times timemass divided by velocity

9. The pitch of a sound is determined mainly by its

wavelength alone, regardless of frequencyspeed of travelamplitude (higher amplitude gives higher pitch)frequency (higher frequency gives higher pitch)

10. A 2 kg object moves at 5 m/s. What is its momentum?

7 kg m/s10 kg m/s5 kg m/s2.5 kg m/s

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