Question

give reason:
1.steam cause more severe burns than boiling water does
2.snow on the top of the mountain does not melt all at once.
3.drinks are cooled more efficiently by storing them with ice blocks rather than ice cold water
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Answer 1

Answer:

1) This is because steam contains the heat energy of boiling water (as steam is formed from boiling water) along with latent heat of vaporisation. ... • Latent heat of vaporisation is the amount of heat energy required to change the phase from liquid to vapour.

2)The snow on mountain does not melt all at once when it is heated by the sun because it. ... At zero degrees the snow changes from solid to liquid state and the energy required for this change is called latent heat. Since this latent is very high it requires more heat and time therefore the ice does not melt all at once.

3)Soft drinks are cool by adding ice cube rather than cool water because, ... The cooling of a drink with a cube of ice is more effective than using cold water because of the energy extracted from the drink to melt the ice (heat of fusion).

Answer 2

Explanation:

Major International Organizations Several international organizations have been set up to address Issues affecting the world in general. Identify and write the full names of the following organizations. NAME FOUNDED 1961 HEADQUARTERS London, UK MISSION Campaign for human rights throughout the world NAME FUND FOUNDED 1945 HEADQUARTERS Washington, D.C., USA MISSION Promote world trade and foster global financial cooperation ZAR NAME FOUNDED 1945 HEADQUARTERS New York City, USA MISSION Promote international peace and order NAME FOUNDED 1948 HEADQUARTERS Geneva, Switzerland MISSION Promote health concerns world- wide and raise medical standards NAME FOUNDED 1961 HEADQUARTERS Gland, Switzerland MISSION Protect endangered animals and create awareness about wildlife WWF NAME FOUNDED 1946 HEADQUARTERS New York City, USA MISSION Improve the health and welfare of children United Nations Children's Fund World Health Organization United Nations Amnesty International International Monetary Fund World Wide Fund for Nature