WPH0 QR Dynamic Papers Physics al Edexcel

info@qrpastpapers.com +20 106 606 6272

Home
Products
Free Past Papers
more
- Plans
- About
- Our Team
- Contact Us
- How It Works
- Our Services
- Why Us?

Edexcel | Physics WPH0 | S 11 5 1 | 1 hour 30 minutes

QP PDF

Manage Classified

MS PDF

Q1
Q2
. . . .
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
Q13
Q14
Q15
Q16
Q17
Q18

17

Add To Classified

Fission and fusion are both nuclear processes that release energy. About 20% of the

UK’s energy need is currently provided by the controlled fission of uranium. Intensive

research continues to harness the energy released from the fusion of hydrogen.

17

(a) (I)

Add To Classified

3 Mark s

Fission of uranium-235 takes place after the absorption of a thermal neutron.

Assume such neutrons behave as an ideal gas at a temperature of 310 K.

Show that the square root of the mean square speed of the neutrons is about

mass of neutron = 1.0087u

17

(a) (II)

Add To Classified

2 Mark s

Complete the equation for the fission of uranium-235.

17

(a) (III)

Add To Classified

4 Mark s

Calculate the energy released in a single fission. Hence determine the rate of

fission necessary to maintain a power output of 2.5 GW.

Fission rate = ....................................................

17

(b) (I)

Add To Classified

4 Mark s

State the conditions for fusion and hence explain why it has proved difficult to

maintain a sustainable reaction in a practical fusion reactor.

(QWC- Work must be clear and organised in a logical manner using

technical wording where appropriate.)

Max THREE from first 5 marking points

• Very high temperatures (>107 K)needed

• To overcome electrostatic repulsion / forces

• Nuclei come close enough to fuse / for strong (nuclear) force

to act

• Very high densities needed

• (Together with high nuclei speeds) this gives a sufficient

collision rate

• (Very high) temperatures lead to confinement problems

• Contact with container causes temperature to fall (and fusion

to cease)

17

(b) (II)

Add To Classified

1 Mark

The nuclear reaction below represents the fusion of two deuterium nuclei.

Complete the equation and identify particle X.

Particle X is a ....................................

17

(b) (III)

Add To Classified

2 Mark s

Despite the difficulties, the quest for a practical fusion reactor continues.

State two advantages fusion power might have over fission power.

Any TWO from

• (Hydrogen) fuel for fusion is (virtually) unlimited whereas

fission relies upon (uranium) a relatively limited resource

• Fusion results in few radioactive products, but radioactive

products produced in fission present significant disposal

problems

• For a given mass of fuel, the energy released by fusion is

greater than the energy released by fission

Q1
Q2
. . . .
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
Q13
Q14
Q15
Q16
Q17
Q18

QR Past Papers.

Email:info@qrpastpapers.com
Phone: +2 0106 606 6272

Home
Legal Information
Terms And Conditions
Return & Refund Policy
Privacy policy

Login
Register
Shop
About us
Contact US
Services

Our Social Networks

All the included past papers are copyrighted © University of Cambridge Local Examinations Syndicate (UCLES), which we have collected from various online sources and gathered together in one website.