Exam Question Mod. 7

From Past Paper May/June 2009 Paper 1:

Companies in the nuclear industry often use simulations because to experiment with nuclear material would be too dangerous.
Give two other examples of computer modelling which are used to minimize danger.
Other than minimizing danger, give three reasons why computer models are used rather than the real thing.

Two from:
Flight/pilot simulation/training; Large scale chemical experiments; Design of fairground rides; Design of large buildings/bridges; Traffic control; Building fire simulation; Car driving simulation

Three from:
Real thing may be too expensive to build
Real thing requires too large a time scale
Real thing would be too wasteful of materials
Real thing is too vast a scale
Real thing may occur too rarely
Rate of change can be adjusted for human eye to detect
Corrections can be made if mistakes in real thing/amendments are easier in a model

A hospital uses computers to monitor the health of patients. Give three advantages of using computers rather than nurses to do this. Explain why analogue to digital conversion is needed when computers are used in monitoring and measuring.

Three from:
Reduced cost of wage bill
Computer readings are more accurate/human errors are reduced
Readings can be taken more frequently/continuously
Nurses can get tired and forget to take readings
Nurses are so busy they might not be able to take readings regularly
Nurses won’t be exposed to contagious diseases
Automatic warnings can be generated
Graphs can be produced automatically
Nurses can be freed up to do other tasks

Sensors are used (to generate data)
Data are then sent to computer
Sensors read analogue data
Computers work with digital data only
Data needs to be converted so computers can process/understand data Baca Selengkapnya...