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Serhud [2]
3 years ago
6

Imagine that a star-forming cloud collapses but retains all of its mass in a single blob. In order to conserve angular momentum,

the cloud must Imagine that a star-forming cloud collapses but retains all of its mass in a single blob. In order to conserve angular momentum, the cloud must _________.
Physics
2 answers:
s2008m [1.1K]3 years ago
8 0

Answer:

The correct answer is spin faster.

Explanation:

The angular momentum or kinetic moment is a physical magnitude, rotational equivalent of the linear momentum and represents the amount of rotational movement of an object. It is a vector quantity that characterizes the inertia properties of a body, which rotates in relation to a certain point. It is found in the three mechanics (classical, quantum and relativistic mechanics). In the International System of Units the angular momentum is measured in kg · m² / s. This magnitude plays a role similar to the linear moment in the translations with respect to the rotations.

Lera25 [3.4K]3 years ago
4 0

Answer: In order to conserve angular momentum, the cloud must spin faster

Explanation: Angular momentum is a vector quantity that is used to describe the property of a rotating object. It can be derived by the multiplication of the moment of inertia and the angular velocity of the object. Angular momentum depends on:

-the mass of the object,

-how far it is spinning,

-whether the mass is close to or far from the center of the mass and spin.

if the distance of the mass from the center of the cloud decreases, the rate of spin must increase to compensate.

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It mimics the real world accurately

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Experiments conducted in the field clearly presents the real world at it is to the scientist. Hardly can any part be controlled precisely and this gives a near to perfect scenario.

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. Which of the following is NOT a property of water? A. Ability to dissolve many substances B. Constant volume upon freezing C.
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Explanation:

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A nonconducting spherical shell, with an inner radius of 4 cm and an outer radius of 6 cm, has charge spread non uniformly throu
Aloiza [94]
In other words a infinitesimal segment dV caries the charge 
<span>dQ = ρ dV </span>

<span>Let dV be a spherical shell between between r and (r + dr): </span>
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<span>= (4π/3)·( r³ + 3·r²·dr + 3·r·(dr)² + /dr)³ - r³ ) </span>
<span>= (4π/3)·( 3·r²·dr + 3·r·(dr)² + /dr)³ ) </span>
<span>drop higher order terms </span>
<span>= 4·π·r²·dr </span>

<span>To get total charge integrate over the whole volume of your object, i.e. </span>
<span>from ri to ra: </span>
<span>Q = ∫ dQ = ∫ ρ dV </span>
<span>= ∫ri→ra { (b/r)·4·π·r² } dr </span>
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6 0
3 years ago
An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at +44 ft/s2. After some time t1,
mash [69]

Answer:

a) t₁ = 4.76 s, t₂ = 85.2 s

b) v = 209 ft/s

Explanation:

Constant acceleration equations:

x = x₀ + v₀ t + ½ at²

v = at + v₀

where x is final position,

x₀ is initial position,

v₀ is initial velocity,

a is acceleration,

and t is time.

When the engine is on and the sled is accelerating:

x₀ = 0 ft

v₀ = 0 ft/s

a = 44 ft/s²

t = t₁

So:

x = 22 t₁²

v = 44 t₁

When the engine is off and the sled is coasting:

x = 18350 ft

x₀ = 22 t₁²

v₀ = 44 t₁

a = 0 ft/s²

t = t₂

So:

18350 = 22 t₁² + (44 t₁) t₂

Given that t₁ + t₂ = 90:

18350 = 22 t₁² + (44 t₁) (90 − t₁)

Now we can solve for t₁:

18350 = 22 t₁² + 3960 t₁ − 44 t₁²

18350 = 3960 t₁ − 22 t₁²

9175 = 1980 t₁ − 11 t₁²

11 t₁² − 1980 t₁ + 9175 = 0

Using quadratic formula:

t₁ = [ 1980 ± √(1980² - 4(11)(9175)) ] / 22

t₁ = 4.76, 175

Since t₁ can't be greater than 90, t₁ = 4.76 s.

Therefore, t₂ = 85.2 s.

And v = 44 t₁ = 209 ft/s.

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