It will either be B or D, but I don't know about burial.
Answer:
Extractive metallurgy
Explanation:
Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form.
Answer:
population: a particular section, group, or type of people or animals living in an area or country
air?:the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
Answer:
THE FINAL TEMPERATURE OF THE LIQUID SAMPLE IS 30.45 DEGREE CELSIUS
Explanation:
Mass of the liquid sample = 1424 g
Initail temperature = 30 degree C
Heat evolved = 1560 J
Specific heat of the liquid = 2.44 J/g degree C
Final temperature = unknown
Since the heat evolved by a substance is the product of the mass, specific heat capacity and the change in temperature of the sample
Heat = Mass * Specific heat * change in temp.
H = m c (T2-T1)
Re-arranging the formula by making T2 (final temperature) the subject of the equation, we have:
T2= H/ m c + T1
So therefore, introducing the value of the variables and solving for T2, we have:
T2 = 1560 / 1424 * 2.44 + 30
T2 = 1560 / 3474.56 + 30
T2 = 0.4487 + 30
T2 = 30.4487 degree C
The final temperature of the liquid sample is approximately 30.45 degree C
1.12kg
Explanation:
Given parameters:
Volume of helium blimp = 6.28 x 10⁹mm
Density of helium in the blimp = 0.1786g/cm³
Unknown:
Mass of helium in the blimp = ?
Solution:
Density is defined as the mass per given volume of a substance.
Density =
We need to convert the volume to a unit we can work with which is cm³
1000L = 1cm³
1mL = 10⁻³L or
1000mL = 1L
6.28 x 10⁹mL =
= 6.28 x 10⁶L
since 1000L = 1cm³
6.28 x 10⁶L gives
= 6.28 x 10³cm³
Mass = density x volume = 0.1786 x 6.28 x 10³m³ = 1121.608g or 1.12kg
Learn more:
Density brainly.com/question/8441651
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