F. Give reasons for the following.
1. The SI unit of density is
km/m³.
2. Volume of a crystal of potash alum cannot be determined by immersing it pintu water taken in a graduated beaker.
3. Speed of a car is more than the speed of a cyclist.
Answers
Answer:
1. WThe SI unit of density is the kilogram per cubic meter [kg/m3]. The Gaussian unit of density is the gram per cubic centimeter which is equivalent to a gram per milliliter [1 g/cm3 = 1 g/ml]. One thousand kilograms per cubic meter equals one gram per cubic centimeter [1000 kg/m3 = 1 g/cm3].
2.the volume of a crystal of potash alum cannot be determined by merging it into water taken in a graduated beaker because there is dissociation of potash alum. Explanation: Potash alum is nothing but potassium ammonium hydroxide.
3.The majority of riders can average a speed of about 15 mph on a one hour ride. A good speed for a beginner is 10 mph, but you should be able to get to 15 mph pretty quickly. If you start training every once in a while, you could get your average up to 18 mph, but training on a regular basis could get you to 22 mph.