Answer:Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus.
Explanation:
The answer to question 9 is the last one, be elevator is 10m/s and the other is -10m/s as they are going in different directions so one will be negative
Mechanical Energy is the energy that deals with motion and position
The chemical formula is CO2. It shows how many elements of each is in this compound.
The necessary light intensity of the disk if the disk has mass 3.89 g and radius 2.40 cm is 6.483 x 10^12cd.
<h3>Calculations and Parameters:</h3>
a. Given that:
- i= intensity of light
- m= mass of disk
- g= gravitational acceleration
- c= speed of light
- a= cross-sectional area of the disk
I = P/A
= Force x Speed/Area
Gravitational force, F= GM1M2/r^2
F= ma, F= mg
I= mg x c/q
That is,
i= mass x gravitational acceleration x speed/area
b.
Mass= 3.89g
Radius, r= 2.40cm
i=?
i= mg x c/a
Speed of light= 3.0 x 10^8 m/s
Area, a= /pi r^2
= 3.142 x (0.024)^2
= 3.142 x 0.000576
= 0.0018m^2.
i= 3.89 x 10 x 3.0 x 10^8/0.0018
i= 6.483 x 10^12cd.
c. Light has no mass, therefore, it lacks momentum and cannot exert pressure for propulsion of materials.
Read more about light intensity here:
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