Daily Practice - 13+ Common Entrance
25th October 1995
- 1Chemistry: Reactions, Energy and Rates
A student dissolves ammonium nitrate in water and the temperature of the solution falls. State whether this process is exothermic or endothermic.
- 2Chemistry: Metals, the Reactivity Series and Environmental Chemistry
Explain why attaching a block of zinc to the hull of a steel ship helps to protect the ship from rusting.
- 3Physics: 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.
- 4Physics: Electricity, Magnetism and Waves
State one way, other than increasing the current, to increase the strength of an electromagnet made from a coil of wire around an iron core.
- 5Physics: Light, Sound and Space
State why an astronaut in open space, far from any planet or star, cannot hear an explosion happening nearby.
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