Question

2)convert the following units into SI units without changing their values? a)3500g (b)2.5km (c)2 h 3)What is the least count of laboratory thermometer and a clinical thermometer?​

Answer 1

① Unit conversion: (SI unit)

a) 3500 g

➤ It is the unit used for measuring mass. SI unit of mass is kilograms(kg). And, 1 kg = 1000 g

➝ 1 g = 1 / 1000 kg

➝ 3500 g = 3500 × 1 / 1000 kg

➝ 3500 g = 3.5 kg

b) 2.5 km

➤ It is the unit for measuring length. SI unit of length is metre(m). And, 1 km = 1000 m

➝ 2.5 km = 2.5 × 1000 m

➝ 2.5 km = 2500 m

c) 2 h

➤ It si the unit for measuring time. SI unit and the most popular unit of time is seconds(s). 1 hour = 3600 s

➝ 2 hours = 2 × 3600 s

➝ 2 hours = 7200 s

② Answer to Question-2)

In laboratories, we generally need to measure the temperature of many chemical substances and other materials, and hence it has a large range that is:

• The markings on the stem of the temperature are between -10°C and 110°C. These are in degree Celsius.

Clinical thermometers are used for measuring temperature of human body. It is generally used by doctors, and we can even find it at home. It has a short range of:

• The markings on the stem are between 35°C and 42°C. This is because, Our body's temperature range is generally between this range. Our Normal body temperature is 37.8°C

Explore more !!

Units are the basic measures through which we can measure any thing like length, or mass or time etc. The units which are accepted everywhere ar known as Standard units. Like MKS system, SI unit system, FPS system of units etc.

• Fundamental units are independent of other quantities and are used for measuring fundamental measure like metre for length, Seconds for Time etc..
• Derived units ar units derived from the fundamental quantities like Speed = Distance/Time, so unit is m/s etc$.$

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