Answer:
Explanation:
Drag force is given by
C = Drag coefficient is constant
A = Area is constant
= Velocity of the passenger jet = 1200 km/h = 
= Velocity of the prop plane = 
= Density of the air where the jet was flying = 
= Density of the air where the prop plane was flying = 
The ratio of the drag forces is .
Answer:
Explanation:
Energy of system of charges
= k q₁q₂ / r₁₂ + k q₁q₃ / r₁₃ + k q₃q₂ / r₃₂
q₁ , q₂ and q₃ are charges and r₁₂ , r₁₃ , r₃₂ are densities between them
9 x 10⁹ ( 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 )
= 9 x 10⁹ x 3 x 16 x 10⁻¹²
= 432 x 10⁻³
= .432 J .
The basic characteristics of living organisms can be reminded by using DR. R. COG one characteristic for each letter:
D- It has Dna or genetic material in its cells.
R- It has the ability to Reproduce
R- It Responds to the environment, this helps it survive easily
C- The Cell is its basic unit
O- It Obtains energy from some type of source
G- It Grows and develops with the passing of the time
Answer:
Past
I walked home.
She studied.
He made a list.
Present
She walks home.
They leave the door open.
Future
She will walk home.
It will open next week.
Explanation:
