Daily Practice - 13+ Common Entrance
Common Entrance english, maths and science.
- 1Chemistry: Reactions, Energy and Rates
A reaction between magnesium ribbon and hydrochloric acid gives off heat, and the temperature of the acid rises from 20 degrees C to 35 degrees C. State whether this reaction is exothermic or endothermic, and explain how you know.
- 2Chemistry: Metals, the Reactivity Series and Environmental Chemistry
State the method used to extract aluminium from its ore, and explain why this method is needed rather than reduction with carbon.
- 3Physics: Forces and Energy
State whether the main force acting when a compass needle points north is a contact force or a non-contact force.
- 4Physics: Electricity, Magnetism and Waves
State whether sound is a transverse wave or a longitudinal wave.
- 5Physics: Light, Sound and Space
A cliff is 170 m from a person who claps and hears the echo. Use distance = speed x time and a speed of sound of 340 m/s to calculate how long after the clap the echo is heard.
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