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Sonja [21]
3 years ago
11

Soil is best described as _______. A. A pure substance B. A compound C. A mixture D. An element

Physics
2 answers:
Alik [6]3 years ago
5 0

Answer:

mixture

Explanation:

Likurg_2 [28]3 years ago
3 0
Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture. The answer would be C (mixture) :)
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How much heat is required to change 200 mL of ice at -22°C (at typical Freezer temperature) into steam
Katena32 [7]

Answer:

611.064 kJ

Explanation:

Given :

m = 200 mL = 200 g

Specific heat of ice = 2.06 J/g°C

Q = mcΔt

Δt = 0 - (-22) = 22

Q1 = 200 * 2.06 * 22 = 9064 J

Q2 = Melt 0 °C solid ice into 0 °C liquid water:

Q2 = m · ΔHf ; ΔHf = heat of fusion of water = 334j/g

Q2 = 200 * 334 = 66800 J

Q3 : Heat to convert from 0°C to 100°C

Q3 = mcΔt ; c = 4.19 J/g°C ; Δt = (100 - 0) = 100

Q3 = 200 * 4.19 * 100 = 83800 J

Q4: heat required to boil water to steam

Q = m · ΔHv

Hv = heat of vaporization of water = 2257 J/g

Q4 = 200 * 2257 = 451400 J

Total Q = Q1 + Q2 + Q3 + Q4

Q = 9064 + 66800 + 83800 + 451400

Q = 611,064 Joules

Q = 611.064 kJ

6 0
3 years ago
Which of the following atoms is least likely to form chemical bonds with other atoms
wariber [46]
The atom that would least likely form chemical bonds with other atoms would be C. A neon containing 4 valence electrons, this is because neon itself is an inert gas, it would not necessarily react as it already possess the maximum number of electrons needed to achieve stability and have a full octet, even if it is forced to obtain 4 valence electrons it would not react with other atoms.
8 0
3 years ago
PLEASE ANSWER ASAP!! A photographer in a helicopter ascending vertically at a constant rate of 9.5 m/s accidentally drops a came
vodomira [7]
C should be the answer! :)))
3 0
3 years ago
Read 2 more answers
A new roller coaster contains a loop-the-loop in which the car and rider are completely upside down. If the radius of the loop i
Oduvanchick [21]

To solve this problem it is necessary to apply the concepts based on Newton's second law and the Centripetal Force.

That is to say,

F_c = F_w

Where,

F_c =Centripetal Force

F_w =Weight Force

Expanding the terms we have to,

mg = \frac{mv^2}{r}

gr = v^2

v = \sqrt{gr}

Where,

r = Radius

g = Gravity

v = Velocity

Replacing with our values we have

v = \sqrt{(9.8)(11.8)}

v = 10.75m/s

Therefore the minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top is 10.75m/s

5 0
3 years ago
A person runs with a constant velocity of 1.2 m/s for 30 seconds. how far do they travel?
Nataliya [291]
They will travel 36 m
8 0
3 years ago
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