1.
TStudent ukázal správnou mezinárodní jednotku…
A. R and S
B. P and R
C. P and Q
D. Q and S
Řešení
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.
Správná odpověď je D.
2. Find the correct relation between quantity and unit.
Řešení
Force = Mass x Akcelerace
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 ms-2
Tlak = force / area
Mezinárodní jednotka síly je 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 výtlak
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
Správná odpověď je 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
Řešení:
A = Length
B = Kilogram
C = Time
D = Area
E = Kg m/s2 = Newton
Správná odpověď je B.
4. Určete 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
Řešení
Basic quantities and International unit (SI) :
Length – meter (m)
Mass – kilogram (kg)
Time – second (s)
Temperature – Kelvin (K)
Luminous intensity—Candela
Správná odpověď je B.
5.
The correct quantities and units based on the International System of Units (SI) shown by number…
A. 1 a 3
B. 1 a 4
C. 1, 2, and 3
D. 1, 3, and 4
Řešení
Quantities and units of the International System (SI) :
(1) Temperature – Kelvin
(2) Mass – Kilogram
(3) Time – Second
(4) Length – Meter
Správná odpověď je D.
