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Class 11
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Physics
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Units and Measurement
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Fundamental and Derived Units
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Conversion of Units of Time
Conversion of Units of Time
6 Mins
Physics
Language
Rate
REVISE WITH CONCEPTS
Basic Knowledge of Measurement of Time
Example
Definitions
Formulaes
>
Smaller and Bigger Units of Time
Example
Definitions
Formulaes
>
Concept of Time - Simple Pendulum.
Example
Definitions
Formulaes
>
QUICK SUMMARY WITH STORIES
Measurement of Time
2 mins
Time Measuring Devices
4 mins
Stop watch and stop clock
3 mins
Measurement of Time- Basic and other units
3 mins
Working of a simple pendulum
2 mins
Time period of simple pendulum
3 mins
Problems on Time Measurements
2 mins
Time - Calculation of days, months, years
2 mins
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Important Questions
What do we call the gravitational force between the earth and an object?
Medium
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>
Why do we need standard unit measurement?
Hard
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>
What do you mean by fundamental & derived quantities? Give the derived unit of Force.
Easy
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>
If the unit of force is
1
0
0
N
,
unit of length is
1
0
m
and unit of time is
1
0
0
s
, what is the unit of mass in this system of units?
Medium
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>
A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:
Medium
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>
The relative density of lead is 11.3. Its density is _____
g
c
m
−
3
or _______
k
g
m
−
3
.
Medium
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>
The unit of Stefan's constant
σ
is
Medium
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>
What are the differences between the mass of an object and its weight?
Medium
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>
Write the differences between mass and weight of an object.
Easy
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>
Which of the following is not the fundamental quantity,
Easy
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>