Daily Practice

13+ Common Entrance

31st March 1990

5 questions · Years 7-8 · 744 questions in this band

1
Chemistry: Reactions, Energy and Rates
In the disappearing cross experiment, a student times how long it takes for a cross under the flask to disappear from view. Explain why a shorter time indicates a faster reaction.
2
Chemistry: Metals, the Reactivity Series and Environmental Chemistry
A piece of magnesium ribbon is added to silver nitrate solution. State whether a displacement reaction would occur, and explain why.
3
Physics: Forces and Energy
A trolley of mass 20 kg is pushed with a resultant force of 60 N. Use force = mass x acceleration to calculate its acceleration.
4
Physics: Electricity, Magnetism and Waves
A wave has a frequency of 50 Hz and a wavelength of 4 m. Use wave speed = frequency x wavelength to calculate its speed.
5
Physics: Light, Sound and Space
Put these bodies in order of their distance from the Sun, starting with the closest: Mars, Mercury, Earth, Venus.

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