Which radiation is stopped by a sheet of paper?
Answer and explanation
Correct answer: C. Alpha
- Step 1: Alpha particles are heavily ionising but weakly penetrating.
- Step 2: A sheet of paper absorbs them.
Answer
Alpha.
Why not the others: Beta: this passes through paper and is stopped by thin aluminium. Gamma: this needs thick lead or concrete. X-rays: these need dense materials.
Practise more Properties of Matter, Waves and Radiation.
Free questions with an explanation for every one, and full timed National 5 (Scotland) mock tests.
More Properties of Matter, Waves and Radiation questions
- A force of 600 N is applied to an area of 0.020 m². What is the pressure?
- Calculate the energy needed to raise the temperature of 2.0 kg of water by 10 °C (c = 4180 J/kg/°C).
- How much energy is needed to melt 0.50 kg of ice at 0 °C? (specific latent heat of fusion of ice = 3.34 × 10⁵ J/kg)
- A gas at a constant temperature has a volume of 4.0 litres at 100 kPa. It is compressed to 2.0 litres. What is the new pressure?
- A sealed container of gas at 300 K and 100 kPa is heated at constant volume to 360 K. What is the new pressure?
- What is 20 °C in kelvin?