What is the function of prefixes in units?
1. What is the function of prefixes in units?
The most important use of unit prefixes (prefixes) can be applied to SI units to form units representing multiples of these units. For example, the prefix kilo means multiplied by 1,000, then 1 kilometer means 1,000 meters and 1 kilowatt means 1,000 watts.
2. What is the use of density in the calculation of percentage by mass?
Penjelasan:
Apa gunanya massa jenis dalam perhitungan persentase massa?
Jawaban:
Density can also be used to determine the mass percent of an unknown concentration.
Penjelasan:
maaf kalau salah, semoga dapat terbantu
3. what is the use of density in the calculation of percentage by mass
Jawaban:
%B = p 10 B / MrPenjelasan:
semoga bermanfaat
4. why are the SI units used in science
Harus dalam bahasa inggris? kalau harus nanti saya translate-kan.
intinya, untuk menyamakan satuan pengukuran di seluruh dunia agar tidak terjadi kebingungan / perselisihan pendapat.
5. The density of aluminium is 2.7 kg/m3. If the mass of aluminium is 8.1 grams, what is the volume of the aluminium in m3?
Jawaban:
[tex]\sf\large{V=0,003\ m³}[/tex]
Penjelasan dengan langkah-langkah:
The known things are;
[tex]\sf\large{ρ = 2,7\ kg/m³}[/tex]
[tex]\sf\large{m = 8,1\ g = 0,0081\ kg}[/tex]
The asked of the volume of aluminium
The answer is;
Use the formula;
[tex]\sf\large{ρ} = \LARGE{\frac{m}{V}}[/tex]
[tex]\sf\large{V} = \LARGE{\frac{m}{ρ}}[/tex]
[tex]\sf\large{V} = \LARGE{\frac{0,0081}{2,7}}[/tex]
[tex]\sf\large{V = 0,003\ m³}[/tex]
So, the volume of the aluminium is [tex]\sf\large0,003\ m³[/tex]
6. If 5 litres of a liquid has a mass of 850 g what is the density of the liquid in g/cm³
Jawaban:
0,17 g/cm^3
Penjelasan:
mass = 850 g
volume = 5 litres = 5.000 cm^3
density = mass/volume
= 850/5.000
= 0,17 g/cm^3
7. If A represents 256 units of stamps and B represents 168 units of stamps. The ratio of B to the total of stamps in the simplest form is
Jawab:
53 : 21
Penjelasan dengan langkah-langkah:
total= 256+168= 424
424 : 168
212 : 84
106 : 42
53 : 21
klo salah bilang di komen nanti saya coba perbaiki
8. an equation that occurs in the theory of gas flow through small-diameter tubes is: Use the equation to determine the SI units of Q.
Jawaban:
kgs^-1
Penjelasan:
The unit k has no units, therefore it has no dimensional formula, so I didn't include it in my workings.
The answer to (p1-p2) will still be written in terms of pressure, so I substituted the whole thing with the dimensional formula of pressure, which is M × L^-1 × T^-2.
The molar gas constant includes K, which stands for Kelvin, so I used the dimensional symbol of T to replace it. The J stands for Joules, which I replaced with its dimensional formula, M • L^-2 • T^-2
Legend: Conversion of units to dimensions
P (Pressure) = ML^-1•T^-2
J (Joules) = M • L^-2 • T^-2
K (Kelvin) = T
T (Temperature) = T
kg (Mass) = M
meter (Length) = L
9. Alarde has a chrcumference of 50,24 unitsWhat is the radius of the circle
Jawaban:
alarde memiliki keliling 50,24 satuan adalah jari-jari lingkaran
10. Calculate the KE of the liquid flowing in a pipe 5 cm inner diameter at the rate of 500 kg/min. The density of the liquid is 1.15 g/cm³.
Jawaban:
The kinetic energy (KE) of the liquid flowing in the pipe can be calculated as follows:
First, we need to determine the velocity of the liquid. This can be calculated using the equation:
v = Q / A
where v is the velocity (m/s), Q is the flow rate (m^3/s) and A is the cross-sectional area of the pipe (m^2).
To convert the flow rate from kg/min to m^3/s, we need to multiply the flow rate by the conversion factor of 1/60. Then, we need to convert the density from g/cm³ to kg/m³:
Q = (500 kg/min) * (1/60 s/min) * (1000 g/kg) = 50/6 m^3/s
ρ = 1.15 g/cm³ * (1000 cm³/m³) = 1150 kg/m³
Now, we can find the cross-sectional area of the pipe:
A = (π/4) * d^2
d = 5 cm
A = (π/4) * (5 cm)^2 = 19.63 cm^2
A = (19.63 cm^2) * (0.01 m/cm^2) = 0.1963 m^2
Using the velocity and the cross-sectional area, we can now find the volume flow rate of the liquid:
v = Q / A = 50/6 m^3/s / 0.1963 m^2 = 156.41 m/s
Finally, we can find the kinetic energy of the liquid:
KE = 0.5 * ρ * v^2 * A
KE = 0.5 * (1150 kg/m³) * (156.41 m/s)^2 * (0.1963 m^2) = 174444.44 J/s = 174.44 kJ/s
11. An object floats above the water surface layering by oil with 70% volume of object in the water, 20% in oil, and the left in above the oil. If density of oil is 0,8 g/cm3, then the density of object is...g/cm3
Jawaban:
0,76 gr/cm3
Penjelasan:
12. a circle has a circumference of 907. 46 units. what is the diameter of the circle?
Jawaban:
sebuah lingkaran memiliki keliling 907,46 unit. berapa diameter lingkaran tersebut
13. steel block has mass 40 g it is in the form of a cube each edge of the cube is 3 cm long so what is the density
Jawaban:
1.481g/cm³
Penjelasan:
density = mass/ volume,
volume of cube is s³
mass = 40 g
v = 3.3.3= 27 cm
density = 40/27
= 1.481 g/cm³
14. what is the function of material/ingredient in procedure text
Jawaban:
artinya :
apa fungsi bahan dalam teks prosedur
15. A metal hemispherical bowl has an external diameter of 50.8 cm and thickness of 2.54cm.i) given that the empty bowl weights 97.9 kg, find the density, in kg/m cube, of the metal which the bowl is made of.ii) if the bowl is completely filled with a liquid of density 3 1.75kg/m cube, find the mass of liquid in grams.
Jawaban:
A metal hemispherical bowl has an external diameter of 50.8 cm and thickness of 2.54cm.
i) given that the empty bowl weights 97.9 kg, find the density, in kg/m cube, of the metal which the bowl is made of.
ii) if the bowl is completely filled with a liquid of density 3 1.75kg/m cube, find the mass of liquid in grams.
16. 4 Singapore is the country with the highest population density in the world. Its population is 5535000 and it has a total area of 719 km² a Calculate Singapore's population density. China is the country with the largest population. b Explain why China has not got the world's highest population density. c Find the area and population of your own country. Calculate your country's population density.
Jawaban:
Caranya Gimana Saya Tidak Tahu
Penjelasan dengan langkah-langkah:
Tau Jelasin Donk Olis
17. Most substances contract when they freeze so that the density of a substance's solid is______________of its liquid. A. Than the higher density B. Higher than the density C. The density is higher than that D. The higher the density
jawabannya yang B.Higherthanthedensity
18. A solid pentagonal pyramid has a mass of 5000 g. It is made of material with a density of 6 g.cm3. given that the base area of the pyramid is 30cm2, find its height
Jawaban:
30cm2 =( 1/2 x 6 )x t
30 cm² = 3 x t
t = 30/3
t = 10
19. 1. the SI unit for.........is ampere 2. ...........is a unit of presure 3.select the odd one out in the following measurement units: A. second B.killogram C. gram D. meter
1. Current
2. Pascal
3. A. Second
Semoga membantu :)
20. The goal of a procedure text is included in the ... titlematerialstepsinstruction
✨Pertanyaan✨The goal of prosedure text is included in the...titlematerialstepsinstruction✨Jawaban✨Steps✨Penjelasan✨Semoga membantu ya o(〃＾▽＾〃)o
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