1.) B.
2.) A.
3.) A.
If these are wrong please delete.
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Answer:
Explanation:
given,
dia of wheel = 66 cm
radius = 33 cm = 0.33 m
mass of wheel = 1.90 Kg
speed of wheel = 230 rpm
time to hold the tire = 3.10 s
Normal force = 2.7 N
coefficient of friction = 0.46
final angular speed = ?
we know
F = μ N
F = 0.46 x 2.7 = 1.242 N
torque
τ = F r
τ = 1.242 x 0.33 = 0.409 Nm
moment of inertia for wheel
I = MR²
I = 1.90 x 0.33²
I = 0.2069 kg m²
we now,
τ = I x α
α = 1.981 rad/s²
we know,
Answer:
- Hydrogen and Helium
- Rock
- Metals
- Hydrogen compounds
Ranked from left to right based on their abundance in the solar nebula:
Hydrogen and Helium-Hydrogen compounds-Rocks-Metals
I hope you find this information useful and interesting! Good luck!
The object is moving backwards but slowing down.
<u>No</u>, Photons are absorbed in a quantum jump from a lower energy level to a higher energy level.
When an electron moves closer to the nucleus and emits a photon, to move an electron further from the nucleus requires the absorption of a photon.
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules.
To learn more about Spectral line, here
brainly.com/question/27494244
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