1.
The correct International Unit showed by student…
A. R and S
B. P and R
C. P and Q
D. Q and S
Solution
Student P :
The international unit of length is meter (m), not centimeter (cm)
The measuring instrument of length is the ruler.
Student Q :
The international unit of electric current is Ampere (A)
The measuring instrument of electric current is an Ampere meter.
Student R :
The international unit of temperature is Kelvin (K)
The measuring instrument of temperature is a thermometer, not a hydrometer.
A hydrometer is an instrument used for measuring the density of liquids based on the concept of buoyancy.
Student S :
The international unit (SI) of mass is kilogram (Kg)
The measuring instrument of mass is a balance scale
The correct data and based on the SI unit (International Unit) shown by student Q and S.
The correct answer is D.
2. Find the correct relation between quantity and unit.
Solution
Force = Mass x Acceleration
The international unit of mass is kilogram (kg)
The international unit of acceleration is meter per second squared (m/s2)
Unit of force = kg m/s2 = kg m s-2
Pressure = force / area
International unit of force is kg m/s2
The international unit of area is m2
Unit of pressure = kg /m s2 = kg m-1 s-2
Energy = Work
Work = force x displacement
International unit of force is kilogram meter per second squared (kg m/s2)
The international unit of displacement is meter (m)
Unit of energy = unit of work= kg m2/s2 = kg m2 s-2
Power = Work / time
International unit of work is kilogram meter squared per second squared (kg m2/s2)
The international unit of time is second (s)
Unit of power is kg m2/s3 = kg m2 s-3
The correct answer is D.
3.
Based on the above table, find A, B, C, D, and E.
A. Volume, kilogram, temperature, area, meter
B. Length, kilogram, time, area, Newton
C. Length, kilogram, volume, area, Joule
D. Length, Newton, time, volume, meter
Solution :
A = Length
B = Kilogram
C = Time
D = Area
E = Kg m/s2 = Newton
The correct answer is B.
4. Determine the pair of basic quantities and units in the International System.
A. Length– meter, mass – kg and electric charge—coulomb
B. Time – second, temperature – Kelvin, luminous intensity—Candela
C. Second – time, meter – length, kg—mass
D. mass – kg, time– second, Kelvin – temperature
Solution
Basic quantities and International unit (SI) :
Length – meter (m)
Mass – kilogram (kg)
Time – second (s)
Temperature – Kelvin (K)
Luminous intensity—Candela
The correct answer is B.
5.
The correct quantities and units based on the International System of Units (SI) shown by number…
A. 1 and 3
B. 1 and 4
C. 1, 2, and 3
D. 1, 3, and 4
Solution
Quantities and units of the International System (SI) :
(1) Temperature – Kelvin
(2) Mass – Kilogram
(3) Time – Second
(4) Length – Meter
The correct answer is D.