Answer:
28.75 %
Explanation:
porosity is the term which is defined as the volume of voids present in the soil to the total volume of the soil.
it is denote by n where
A porous material is one which contain pores, if a material is porous it will allow the water to pass through it.
the porosity of the gravel sample is 28.75%
Answer:
1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Water vapor
5. Ozone
Explanation:
The atmosphere composes of 78% nitrogen which occupies the largest percentage followed by oxygen which takes up 21%, Argon takes up 1% then other components such as water vapor occupy between 0-7% and ozone takes 0.0-0.01. Moreover, 0.01-0.1 is occupied by carbon dioxide. Therefore, the answers for 1-5 are as follows.
1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Water vapor
5. Ozone
21. Magnetism is produced by the motion of electrons as they
a. move around the nucleus.
b. spin on their axes.
c. both A and B
d. none of the above
22. If you put a small compass in a magnetic field, the compass will
a. line up in a direction parallel to the magnetic field lines.
b. swing randomly.
c. line up in a direction perpendicular to the magnetic field lines.
d. seek electrical charge concentrations.
23. Magnetic field strength is
a. strongest close to a magnet.
b. constant everywhere around a magnet.
c. strongest far from a magnet.
24. Magnetic domains are
a. regions that may or may not be magnetized.
b. clusters of atoms randomly aligned.
c. regions of atoms magnetically aligned.
d. blocks of material.
25. Earth's magnetic field is most likely due to
a. millions of small magnets buried in Earth.
b. a magnetized solid inner core of Earth.
c. convection currents in the molten part of Earth's interior.
d. the rotation of Earth acting on all of Earth's electrons.
Answer:
Distance-how far smthing travels.
Explanation:
That is correct what you did
Answer:
d. 149 ⁰C.
Explanation:
Given;
mass of the block of ice, m = 2 kg
specific heat capacity of the ice, C = 2090 J/(kgK)
initial temperature of the ice, t₁ = -90 ⁰C
heat added to the ice, H = 1,000,000 J
let the final temperature of the ice = t₂
The final temperature of the ice after adding the heat is calculated as follows;
Therefore, the new temperature of the water is 149 ⁰C.