Answer:
v = 26.7 mph
Explanation:
During the first 5 hours, at a constant speed of 20 mph, we find the total displacement to be as follows:
Δx₁ = v₁*t₁ = 20 mph*5 h = 100 mi
Assuming we can neglect the displacement during the speeding up from 20 to 60 mph, we can find the the total displacement at 60 mph as follows:
Δx₂ = v₂*t₂ = 60 mph*1 h = 60 mi
So, the total displacement during all the trip wil be:
Δx = Δx₁ + Δx₂ = 100 mi + 60 mi = 160 mi
So we can find the the average velocity during the 6-hour period, applying the definition of average velocity, as follows:
v = Δx / Δt = 160 mi / 6 h = 26.7 mph
Answer:
The image is located at number 4
Explanation:
As we know that object is located at the position
now for the position of image we can use lens formula as
now we have
now we have
also we know that the magnification is given as
so image will be inverted and its position is 2f
so correct number will be 4
Answer:
Sigma, lone pair.
Explanation:
The geometry of small compounds can be predicted using valence shell electron pair repulsion (VSEPR) theory, which focuses on the number of sigma bonds and lone pair exhibited by each atom.
The toughest type of covalent chemical bond is the sigma bonds. These are formed by intersection of atomic orbitals heads on. For diatomic molecules, Sigma bonding is most generally defined using the terminology and methods of symmetry groups.
A theory does <em>not </em>become a law! So, C is already out.
In science, we always want to be updating and revising our information. We don't just say 'Oh, this supports my theory. Ah ha! It's proven! No more research is needed'.
The best option here will most likely be B. =)
Answer:
The answer is B, velocity.
Explanation:
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