Answer:
1) Mass of the grain is 
.
2) 0.08901 kg of sand would have surface area equal the surface area of the cube.
Explanation:
1) Radius of the grain,r = 64.8 µm =
Volume of the sphere =
Volume of the grain of a sand:
Density of a grain of sand = 
Mass of a grain of a sand = M
Mass of the grain is .
2) Surface are of sphere: 
Surface area of a grain:
Length of the cube = a = 0.514 m
Total surface area of cube ,A'= 
let the number grains with area equal to total surface area of cube be x.
Volume of x number of grains :V'
Mass of 
of sandL:
=
0.08901 kg of sand would have surface area equal the surface area of the cube.
Answer:
Mechanical energy = 3.92 J
exactly 3.92 j
Explanation:
As we know that mechanical energy is sum of kinetic energy and potential energy of the system
so here we can say that mechanical energy is sum of kinetic energy of ball and its potential energy
Since ball is at rest so kinetic energy of the ball must be ZERO
Now for potential energy we know that
now we know
m = 0.2 kg
h = 2 m
now for potential ene'rgy
so mechanical energy is given as
Mechanical Energy = 3.92 + 0 = 3.92 J
Answer: A) F
B) I
C) O
D) Na
Explanation: not sure if this is what ur asking for but those are the symbols
Avogadros law is applied when temperature and pressure remain constant, and details the direct relationship between moles and volume in this circumstance
<span>antimony. It has +3,+5,-3 so yeah. the others carbon+2,+4,-4, chlorine +1,+5,+7,-1 but -1 is the most often so it isn't Cl, calcium +2.</span>
