Noble gasses.
alkali metals (the first column of elements), alkaline earth metals (the second column of elements), halogens (the next-to-last column of elements), and noble gases (the last column of elements).
Answer:
The ratio of the model size is 1 : 2000
Explanation:
Given
Real Diameter = 0.012 um
Scale Diameter = 24 um
Required
Determine the scale ratio
The scale ratio is calculated as follows;

Substitute values for real and scale measurements

Divide the numerator and the denominator by 0012um

Represent as ratio

<em>Hence, the ratio of the model size is 1 : 2000</em>
Answer:
The minimum launch speed is 13366.40 m/s.
Explanation:
Given that,
Mass of planet 
Radius 
Height = 6R
We need to calculate the speed
Using relation between gravitational force and total energy




Put the value into the formula


Hence, The minimum launch speed is 13366.40 m/s.
Answer:
vertical component = 9.7m/s
Explanation:
Vy= (23)sin25 = 9.7m/s
Mechanical digestion is chewing, and chemical digestion is the saliva in your mouth breaking down food.