Answer:
Δω = -6.00 rad/s
α = -2.61 m/s²
Explanation:
Step 1: Data given
A bicycle tire is spinning counterclockwise at 3.00 rad/s
Δt = 2.30 s
In theopposite (clockwise) direction, also at 3.00 rad/s
Step 2: Calculate the change in the tire's angular velocity Δω
Δω = ωf - ωi
ωf = - 3.00 rad/s
ωi = 3.00 rad/s
Δω = ωf - ωi = -3.00 - 3.00 = -6.00 rad/s
Step 3: Calculate the tire's average angular acceleration α
α = Δω / ΔT
α = -6.00 rad/s /2.30s
α = -2.61 m/s²
A negative angular acceleration means a decreasing angular velocity
b. Refraction
Explanation:
Fish in the aquarium are looking much bigger than they are due to refraction.
Refraction causes the path of light to bend and the velocity and wavelength attenuated.
This phenomenon occurs when light travels between two materials of different densities.
- Air has a refractive index of 1
- Water has a refractive index of 1.33
- When light form water comes to air, the their angle changes.
- This causes the magnification of the fish.
Learn more:
Refraction brainly.com/question/12370040
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All metals are good conductors.
Hope that helped you.
(23-34,13--37)
(-11,13-37)
(-11,50)
Hope that helps