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27 questions · timed · auto-graded

Question 51 Mark
The body temperature of a patient on Monday was 102 °F and on Tuesday it was 104°F. What was the rise in temperature during these two days ?
Answer
Body temperature on Monday = 102°F
Body temperature on Tuesday = 104°F
Rise in temperature = 104 – 102°F = 2°F
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Question 61 Mark
An aeroplane leaves Bengaluru at 23:50 hours and reaches Chennai at 00.40 hours. Rewrite the statement using a 12-hour time format. Also find the duration of the flight.
Answer
Aeroplane leaves Bengaluru at 11:50 p.m.
and reaches Chennai at 12:40 a.m.
Duration of the flight = 50 minutes
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Question 71 Mark
A lawn is in the shape of a square. Find the area covered by the iawn if each of its sides is 50 m.
Answer
Length of each side = 50 m
Area of square lawn = side x side = 50 x 50 nr = 2500 m2
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Question 81 Mark
Grass is to be laid a rectangular field of dimensions 55 m x 45 m. Calculate the area of the field.
Answer
Length of field = 55 m Breadth of field = 45 m
Area of rectangular field = length x breadth = 55 x 45 m2 = 2,475 m2
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Question 91 Mark
Amit dipped a stone tied with a string in a measuring cylinder filled with water. If the initial level of water was 56 mL and after dipping the stone the final level of water was 78 mL, find the volume of the stone.
Answer
Initial level of water = 56 mL Final level of water = 78mL Volume of the stone = ?
Volume of the stone = Final reading – Initial reading = 78mL – 56 mL = 22 mL
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Question 101 Mark
Measuring units are standardized.
Answer
Measuring units are standardized so that accurate measurement can be done and are accepted universally.
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Question 111 Mark
Measurements are very important for life.
Answer
We need to measure the quantities of most of the things around us to be able to take correct decisions regarding their utility. To find the exactness of an unknown quantity, we need its measurement.
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Question 121 Mark
Body parts should not be used for correct measurements of an object.
Answer
Body parts have different sizes from person to person and hence the value varies. Since, there is no uniformity or accuracy in the reading, body parts should not be used for correct measurement of an object.
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Question 131 Mark
What is the function of the bulb in a thermometer ?
Answer
The bulb in a thermometer is filled with mercuiy. When the bulb is heated, mercury in the bulb expands and rises up in the capillary tube. The height of the mercuiy gives the reading of temperature.
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Question 141 Mark
What do you mean by a mean solar day ?
Answer
Mean solar day is the time taken by the earth to make one complete rotation about its own axis.
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Question 151 Mark
What is parallax error ?
Answer
The error that can arise due to the wrong positioning of the eye while reading a scale is called parallax error.
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Question 161 Mark
What do you understand by the term ‘mass’ ? Name any one instrument used for weighing.
Answer
The amount of matter present in an object is called its mass. Instruments used to measure mass are beam balance, spring balance, physical balance, electronic weighing machines, etc.
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Question 171 Mark
Which unit will you use to find the length of your notebook and why ?
Answer
Centimetre. Because a notebook has a length for which metre would be too large a unit to measure and millimetre would be too small.
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Question 181 Mark
Which institution in the world maintain the guidelines for using the SI units correctly ?
Answer
General Conference of Weights and Measures.
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Question 191 Mark
Mention any two advantages of the metric system over traditional units.
Answer
  • 1. The metric units are accurate whereas the traditional units were not uniform.
    2. The metric system is accepted globally whereas the traditional units had different values at different places.
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Question 201 Mark
What are the characteristics of a standard unit ?
Answer
  • It should be accepted universally.
  • It should be accurate.
  • It should be neither too small nor too big and easy to use.
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Question 211 Mark
What are derived physical quantities ? Give any two examples of derived physical quantities.
Answer
Physical quantities that are derived from one or more fundamental physical quantities are called derived physical quantities. Examples : area, volume, speed, density, etc.
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Question 221 Mark
What do you understand by the term ‘measurement’ ?
Answer
Determining the exact value of an unknown quantity by comparing it with a known fixed quantity is called as measurement.
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Question 231 Mark
Write the formula for finding the average of a given set of observation. sum of all observations
Answer
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Question 251 Mark
If the alarm of a digital clock is set at 05:50, at what time will the alarm ring during the day ?
Answer
5.50 a.m.
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Question 261 Mark
Name an instrument generally used to find the time interval between two events accurately.
Answer
Stop watch.
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[1 Mark Question Answer] - PHYSICS STD 6 Questions - Vidyadip