Calculate the speed of a wave with frequency 50 Hz and wavelength 6.8 m.
24 marks
Compare alpha, beta and gamma radiation.
32 marks
Calculate the kinetic energy of a 1200 kg object moving at 15 m/s.
42 marks
Calculate the speed of a wave with frequency 4 × 10¹⁴ Hz and wavelength 7.5 × 10⁻⁷ m.
52 marks
A sample has an activity of 800 Bq. Calculate its activity after 3 half-lives.
62 marks
Calculate the kinetic energy of a 0.16 kg object moving at 30 m/s.
73 marks
Compare transverse and longitudinal waves, with an example of each.
82 marks
A sample has an activity of 6400 Bq. Calculate its activity after 4 half-lives.
92 marks
Calculate the kinetic energy of a 75 kg object moving at 8 m/s.
106 marks
Describe how to measure the speed of water waves in a ripple tank.
113 marks
Complete the decay equation for uranium-238 decaying by alpha emission to thorium (Th).
122 marks
Calculate the gain in gravitational potential energy when a 60 kg object is lifted 12 m. (g = 9.8 N/kg)
133 marks
Explain why light refracts when it enters glass from air.
143 marks
Explain the difference between contamination and irradiation.
152 marks
Calculate the gain in gravitational potential energy when a 2.5 kg object is lifted 4.2 m. (g = 9.8 N/kg)
164 marks
Give one use and one hazard of each of: ultraviolet and X-rays.
174 marks
Explain why gamma emitters are used as medical tracers but alpha emitters are not.
182 marks
A motor transfers 450 J of useful energy for every 600 J supplied. Calculate its efficiency.
193 marks
Explain how ultrasound is used to measure the depth of the sea.
204 marks
Describe the process of nuclear fission and how a chain reaction occurs.
212 marks
A motor transfers 36 J of useful energy for every 120 J supplied. Calculate its efficiency.
221 mark
Which electromagnetic wave has the longest wavelength?
Finished?
Answer every question to finish (22 left), or finish when the time’s up.
Score 0 / 60 · 0 of 22 marked
This paper is written by Plasmo in the style of the OCR GCSE Combined Science exam. It is not a past paper and is not produced or endorsed by the exam board.