A solid exerts pressure of 20Pa on a surface of 2m 2. Find its weight. (1) 2) Write full form of SONAR. (1) 3) If the speed of the body is halved, what is the change in its kinetic energy? (2) 4) State the causes and effects of depletion of ozone layer. (2) 5) Mention any two functions of smooth endoplasmic reticulum. (2) 6) Account for the following: a) The smell of lighted incense stick reaches you faster you several metres away but to get the smell from unlighted incense stick you have to go close. b) A wooden chair is a solid at room temperature. c) Water coolers are not effectivne o a rainy day.
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1. w=pressure/area
20/2=10n
2. sound navigation and ranging.
3. K.E = 1/8m
4. i. it is involved in the biosynthesis lipid,cholestrol and steriod hormones.
ii. SER of liver cells of the vertebrates detoxifies many poisonous chemicals and drugs.
20/2=10n
2. sound navigation and ranging.
3. K.E = 1/8m
4. i. it is involved in the biosynthesis lipid,cholestrol and steriod hormones.
ii. SER of liver cells of the vertebrates detoxifies many poisonous chemicals and drugs.
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