Answer:
B. Chemical changes involve the formation of a new substance.
Explanation:
They can both release energy, both can be measured, and chemical changes can be caused by oxygen, so I believe it would be B.
Answer:
ρ=0.0102lbm/ft^3
Explanation:
To solve this problem we must take into account the equation of continuity, this indicates that the sum of the mass flows that enter a system is equal to the sum of all those that leave.
Therefore, to find the mass flow of exhaust gases we must add the mass flows of air and fuel.
m=0.59+60=60.59lbm/s( mass flow of exhaust gases)
The equation that defines the mass flow (amount of mass that passes through a pipe per unit of time) is as follows
m=ρVA
Where
ρ=density
V=velocity
m=mass flow
A=cross-sectional area
solving for density
ρ=m/VA
ρ=60.59/{(1485)(4)}
ρ=0.0102lbm/ft^3
Should be -9.8m/s^2!!! The force of gravity is the only thing pushing it down!!
Hope I helped you out!!
Answer:
the act or process of removing something from its usual or proper place or the state resulting from this
Explanation:
Medical Definition of displacement 1 a : the act or process of removing something from its usual or proper place or the state resulting from this : dislocation the displacement of a knee joint b : percolation sense 3 2 : the quantity in which or the degree to which something is displaced
Answer:
The question has the following answer options:
A. It decreases.
B. It increases.
C. It decreases then increases.
D. It does not change.
The correct answer is: D. It does not change.
Explanation:
The trajectory of a projectile is the path that a body follows when it has been thrown. It can be depicted in a coordinate system. Typically, the horizontal x axis stands for the distance that the object travels (in direction x) and the vertical and axis stands for the height (in direction y) of the throw. This very common form of movement is surprisingly simple to analyze if the following two assumptions are made:
1. The acceleration of free fall, g, is constant throughout the range of motion and is directed downward.
2. The effect of air resistance can be ignored.
With these assumptions, it is found that the curve that describes a projectile, and that it is known as its trajectory, is always a parable.
The horizontal velocity remains constant because in that direction the acceleration is zero.
