I’m pretty sure it’s Radioactive decay
Answer:43.34 m
Explanation:
Given
acceleration(a)
Initial Velocity(u)=0 m/s
After 6 s fuel runs out
Velocity after 6 s
v=u+at
After this object will start moving under gravity
height reached in first 6 s
s=36 m
After fuel run out distance traveled in upward direction is
here v=0
u=12 m/s
Explanation:
speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
Answer:
D. is greater for turbulent flow than for laminar flow
Explanation:
what is friction drag?
- friction drag is a phenomenon experienced when a body moves through a fluid. A practical example can be seen in the mild warmth we experience rubbing the palm's of one's hand together only in this case we are dealing with a solid body and a fluid (e.g air, water). friction drag is directly proportional to the area of the surface in contact with the fluid and increases as velocity increases. We see a practical example of this when the rate at which one rubs the palms together is fast but we use the word turbulent when we are dealing with fluids. Turbulent flow creates more friction drag than laminar flow( Flow between a smooth body and fluid) due to its greater interaction with the surface of the body
- it is important to know that friction is also called viscous drag or skin drag
- I recommend Richardson and coulson vol 2 textbook, page 149, Chemical enginering fluid mechanics textbook by Ron dardy, page 341 for clearer explanation
Answer:
1961 kJ
Explanation:
Since the mass of each substance is 1 kg, the heat required to change a substance at is boiling point is its latent heat of vapourization, L. For a given mass, m, the quantity of heat Q = mL
For liquid water, m = 1 kg and L = 2256 kJ/kg.
So, quantity of heat required is thus Q₁ = 1 kg × 2256 kJ/kg = 2256 kJ
For liquid mercury, m = 1 kg and L = 295 kJ/kg.
So, quantity of heat required is thus Q₂ = 1 kg × 295 kJ/kg = 295 kJ
The amount their thermal energies differ is thus Q₁ - Q₂ = 2256 kJ - 295 kJ = 1961 kJ
