Answer:
Time = 6.243 years = (1.97 × 10⁸) s
Explanation:
Speed = (Distance)/(Time)
Time = (Distance)/(Speed)
Distance = 4.37 light years = 4.37 × c × years
Time = (4.37 c.years)/(0.7c)
Time = 6.243 years = (1.97 × 10⁸) s
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Answer:
A) θ = 13.1º , B) E
Explanation:
A) For this exercise, let's use Newton's second law, let's set a reference frame where the axis ax is in the radial direction and is horizontal, the axis y is vertical.
In this reference system the only force that we must decompose is the Normal one, let's use trigonometry
sin θ = Nₓ / N
cos θ = / N
Nₓ = N sin θ
Ny = N cos θ
x-axis (radial)
Nₓ = m a
where the acceleration is centripetal
a = v² / R
we substitute
-N sin θ = -m v² / R (1)
the negative sign indicates that the force and acceleration towards the center of the circle
y-axis (Vertical)
Ny - W = 0
N cos θ = mg
N = mg / cos θ
we substitute in 1
mg / cos θ sin θ = m v² / R
g tan θ = v² / R
θ = tan⁻¹ (v² / gR)
we calculate
θ = tan⁻¹ (25² / 9.8 274)
θ = 13.1º
B) when comparing the equations the correct one is E
Answer:
C. The wheel with spokes has about twice the KE.
Explanation:
Given that
Mass , radius and the angular speed for both the wheels are same.
radius = r
Mass = m
Angular speed = ω
The angular kinetic energy KE given as
I=Moment of inertia for wheels
Wheel made of spokes
I₁ = m r²
Wheel like a disk
I₂ = 0.5 m r²
Now by comparing kinetic energy
KE₁= 2 KE₂
Therefore answer is C.
a meteorite impact
Explanation:
What most likely cause the bowl - like structure is a meteorite impact.
This is can be deduced from the presence of iridium and bowl - like structure on the earth.
Iridium has a higher abundance in meteorite than the normal crustal abundance.
During a meteorite collision on the surface, it is often encounter in craters.
learn more:
Meteorite brainly.com/question/6536722
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