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Eduardwww [97]
3 years ago
8

following statement supports which theory? "Astronomers have observed protoplanetary disks around distant newborn stars." Big Ba

ng theory Nebular theory Cell theory String theory
Physics
2 answers:
Ad libitum [116K]3 years ago
8 0

Answer:

nebular theory

Explanation:

Irina-Kira [14]3 years ago
5 0

Answer: B

Nebula theory

Explanation:

Nebular Theory: This states that the solar system developed out of an interstellar cloud of dust and gas, called a nebula. If astronomers have observed protoplanetary disks around distant newborn stars, the Sun-to-be collected most of the mass in the nebula's center, forming a Protostar

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when a charge of 1 C has an electric PE of 1 J, it has an electric potential of 1 V. When a charge of 2 C has an electric PE of
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3 years ago
A dentist’s drill starts from rest. After 1.46 sof constant angular acceleration, it turns at arate of 27000 rev/min.Find the dr
Black_prince [1.1K]

Answer:

616.3 rad/s²

Explanation:

Given that

t= 1.46 s

Initial angular velocity ,ωi = 0 rad/s

Final angular velocity ωf= 27000 rev/min

Angular speed in the rad/s given as

\omega_f=\dfrac{2\pi N}{60}\ rad/s

Now by putting the values

\omega_f=\dfrac{2\times 27000}{60}\ rad/s

ωf=900 rad/s

We know that (if acceleration is constant)

ωf=ωi + α t

α=Angular acceleration

900 = 0 + α x 1.46

\alpha=\dfrac{900}{1.46}\ rad/s^2\\\alpha=616.43\ rad/s^2

Therefore the acceleration will be 616.3 rad/s²  

4 0
3 years ago
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san4es73 [151]

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Can someone please help me with this one
Brilliant_brown [7]

Answer:

in left

Explanation:

Hope it will help

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