Physics
Write one word or few words for the following.
(a) The standard system of units accepted worldwide
(b) Error in measurement due to positioning of the eye
(c) The instrument used to measure long lengths of straight or curved objects
(d) Formula to calculate the area of a circle
(e) The instrument used in labs for accurate measurement of mass
Measurements
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Answer
(a) International System of Unit or SI units
(b) Parallax error
(c) Measuring tape
(d) π х (Radius)2
(e) Electronic balance
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Fill in the blanks.
(a) …………… quantities are derived from fundamental quantities.
(b) The distance between two extreme ends of an object is called …………… .
(c) …………… is the amount of matter contained in an object.
(d) The Sl unit of time is …………… .
(e) …………… thermometer measures temperature in the range of -10 °C to 110 °С.
State whether the given statements are true (T) or false (F). Correct the false statements.
(a) FPS system is the standard system of units.
(b) Area of a surface is measured using standard formulae and graph paper.
(c) The SI unit of mass is gram.
(d) One solar day is equal to 24 hours.
(e) Mercury is used as thermometric fluid in thermometers.
Match the columns.
Column A Column B 1. A non-standard unit (a) Thickness of wire 2. Screw gauge (b) Square 3. Two-dimensional figure (c) Cubit 4. One century (d) Kink 5. Important part of a clinical thermometer (e) 100 years Give reasons for the following statements.
(a) A standard system of units was accepted.
(b) The correct position of eye is important to take measurements.
(c) A tailor uses measuring tape to take measurements.
(d) Jerks should be given to a clinical thermometer before using.
(e) Labs prefer using electronic balances.