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vazorg [7]
2 years ago
13

When Stone B collides with Stone A during Test 2, Stone B stops and Stone A begins to move. Which statement BEST describes the m

omentum in Test 2?
A
Stone A moves away from Stone B at a velocity of 4 m/s, and the momentum is conserved.

B
Stone A moves away from Stone B at a velocity of 2 m/s, and the momentum is not conserved.

C
Stone A moves away from Stone B at a velocity of 4 m/s, and the momentum is not conserved.

D
Stone A moves away from Stone B at a velocity of 2 m/s, and the momentum is conserved.

Physics
1 answer:
Anna11 [10]2 years ago
5 0

Answer:

A

Explanation:

According to law of conservation of momentum, the total momentual in the system will be conserved

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Answer: 0

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A cooling fan is turned off when it is running at 850 rev/min. It turns 1500 revolutions before it comes to a stop. (a) What was
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Answer

given,

cooling fan revolution = 850 rev/min

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\omega = 850 \dfrac{2\pi}{60}

\omega = 89\ rad/s

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θ = 1500 x 2 x π

θ = 9424.78 rad

a) using equation of rotation

ω² = ω₀² + 2 α θ

ω = 0 because body comes to rest

0 = 89² + 2 x α x 9424.78

α = -0.42 rad/s²

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t = \dfrac{89}{0.42}

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3 years ago
The charge per unit length on a long, straight filament is -92.0 μC/m. Find the electric field 10.0 cm above the filament.
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Answer:

E = 1.655 x 10⁷ N/C towards the filament

Explanation:

Electric field due to a line charge is given by the expression

E = [tex]\frac{\lambda}{2\pi\times\epsilon_0\times r}[/tex]

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8.85 x 10⁻¹².

Putting the given values in the equation given above

E = \frac{92\times10^{-6}}{2\times3.14\times8.85\times10^{-12}\times10^{-1}}

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Explanation:

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