Answer:
Our consciousness is why they exist.
In Aristotle's Metaphysics, there are four causes of existence or change in nature: the material cause, the formal cause, the efficient cause, and the final cause.
We do know that the world will end sometime between 7 and 8 billion years from now that's all we know as of right now.
Answer:
25 m
Explanation:
Given:
v₀ = 0 m/s
a = 0.22 m/s²
t = 15 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (0 m/s) (15 s) + ½ (0.22 m/s²) (15 s)²
Δx = 24.75 m
Rounded to two significant figures, the runner moves a distance of 25 m.
Answer: Heyyyyyyyyyyyyyy
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"<u>some of the effects of urbanization</u>"
<em>Poor air and water quality, insufficient water availability, waste-disposal problems, and high energy consumption are exacerbated by the increasing population density and demands of urban environments</em>
<u><em>"hope this helps"</em></u>
Answer:
The coil radius of other generator is 5.15 cm
Explanation:
Consider the equation for induced emf in a generator coil:
EMF = NBAω Sin(ωt)
where,
N = No. of turns in coil
B = magnetic field
A = Cross-sectional area of coil = π r²
ω = angular velocity
t = time
It is given that for both the coils magnetic field, no. of turn and frequency is same. Since, the frequency is same, therefore, the angular velocity, will also be same. As, ω = 2πft.
Therefore, EMF for both coils or generators will be:
EMF₁ = NBπr₁²ω Sin(ωt)
EMF₂ = NBπr₂²ω Sin(ωt)
dividing both the equations:
EMF₁/EMF₂ = (r₁/r₂)²
r₂ = r₁ √(EMF₂/EMF₁)
where,
EMF₁ = 1.8 V
EMF₂ = 3.9 V
r₁ = 3.5 cm
r₂ = ?
Therefore,
r₂ = (3.5 cm)√(3.9 V/1.8 V)
<u>r₂ = 5.15 cm</u>
Higher pitched sounds produce waves which are closer together than for lower pitched sounds. A smaller triangle or cymbal will make a relatively higher pitch note