1. Cold packs used in sports are examples of chemical energy. When the inner pouch is broken which is filled with water it reacts with the ammonium nitrate granules and makes new chemical bonds during the reaction absorbing energy from the surroundings.
The NBT is compulsory for prospective students applying to the Faculty of Health Sciences and the Diploma in Veterinary Nursing must write the NBT before or on 15 July in order to be considered for selection. The NBT is also used in the admission processes of the extended programmes.
Scores are posted online about three weeks after the test date. PBT TOEFL scores are mailed about five weeks after the test. Again, they will arrive about 7 to 10 days after that in the US. PBT test-takers can also receive their TOEFL scores by phone for $10. They are available on the Saturday before the scores are mailed.