GCSE Edexcel Physics Biofuels: 7. (a) Use words from the box to

Question

7. (a) Use words from the box to complete the sentences about nuclear fission of uranium-235 (U-235).

A neutron hits a nucleus of U-235 and causes the nucleus to ________________.
Each fission releases energy, two daughter nuclei and some ________________.
In a nuclear reactor, one fission can set off a controlled ________________ reaction.

(b) Both U-235 and oil can be used as energy sources for generating electricity.
1 kg of natural uranium can result in the generation of 45,000 units of electricity.
1 kg of oil can result in the generation of 5,000 units of electricity.
Calculate the mass of oil needed to generate the same amount of electricity as 1 kg of natural uranium.

mass of oil = ________________ kg

(c) Both using nuclear fuel and burning oil produce harmful waste products.
State one harmful waste product from each process.

using nuclear fuel: ________________
burning oil: ________________

(d) Figure 14 shows a household smoke alarm that uses radioactivity to detect smoke.

The radioactive source in the smoke detector is americium-241.
The table in Figure 15 shows some information about americium-241 and two other radioactive sources.

Explain why americium-241 is the best of these three sources to use in this smoke detector.

Your answer should refer to
- properties of alpha and gamma radiation
- half-life.

7. (a) Use words from the box to complete the sentences about nuclear fission of uranium-235 (U-235) - Edexcel - GCSE Physics - Question 7 - 2020 - Paper 1

Worked Solution & Example Answer:7. (a) Use words from the box to complete the sentences about nuclear fission of uranium-235 (U-235) - Edexcel - GCSE Physics - Question 7 - 2020 - Paper 1

a) A neutron hits a nucleus of U-235 and causes the nucleus to

a) Each fission releases energy, two daughter nuclei and some

a) In a nuclear reactor, one fission can set off a controlled

b) Calculate the mass of oil needed to generate the same amount of electricity as 1 kg of natural uranium.

c) State one harmful waste product from each process. using nuclear fuel:

c) burning oil:

d) Explain why americium-241 is the best of these three sources to use in this smoke detector.

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