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matrenka [14]
4 years ago
15

A 1.40-kg particle moves in the xy plane with a velocity of v with arrow = (4.00 î − 3.30 ĵ) m/s. Determine the angular momentum

of the particle about the origin when its position vector is r with arrow = (1.50 î + 2.20 ĵ) m.
Physics
1 answer:
julsineya [31]4 years ago
5 0

Answer:

the angular momentum of the paticle is 8.4i - 10.2j.

Explanation:

the angular momentum is given by:

L = m×v×r

  = (1.40)×(4.00i - 3.30j)×(1.50i + 2.20j)

   = (1.40)×[(4.00×1.50)i - (3.30×2.20)j]

   = (1.40)×(6i - 7.26j)

   = 8.4i - 10.2j

Therefore, the angular momentum of the paticle is 8.4i - 10.2j.

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Shown here are astronomical objects located at different distances from Earth. Rank the objects based on their distances from Ea
nevsk [136]

Answer: star on far side of Andromeda Galaxy- star on near side of Andromeda Galaxy- star on far side of Milky Way Galaxy- star near center of Milky Way Galaxy- Orion Nebula- Alpha Centauri- Pluto-The Sun

Explanation:

Andromeda is the nearest spiral galaxy to our Milky way galaxy. The star on the far side of the Andromeda galaxy would be farthest from Earth. Then, the star at the near side of the Andromeda galaxy.

The Earth along with the Sun and other planets are located in the Orion arm of the Milky way. It is about 8 kpc from the center of the Milky way. Thus, the next farthest astronomical object would be the star on the far side of the milky way and then a star near the center of the Milky way galaxy.

Orion Nebula is 1344 ly away from Earth. Alpha centauri is 4.36 ly away from earth. Pluto is about 28 AU away from Earth and Sun is 1 AU distance away.

4 0
3 years ago
The current interest in continental drift was started with the notion of sea- floor spreading, which was propounded by Hess and
timofeeve [1]

Answer:

idk

Explanation:

7 0
3 years ago
Object A has a length of 3 cm, a width of 2 cm, and a height of 4 cm. Object B is dropped into a graduated cylinder. It displace
MA_775_DIABLO [31]

Answer:

  A:  greater than the volume of object B

Explanation:

Based on the dimensions, the volume of object A is ...

  (3 cm)(2 cm)(4 cm) = 24 cm³ = 24 mL

If object B displaces 19 mL of water, we presume that is its volume. Since 24 mL is more than 19 mL, we conclude ...

  The volume of object A is greater than the volume of object B.

_____

<em>Comment on density</em>

We have presumed that object B is completely submerged. If it is not, then the relative volumes will depend on the densities. If the density of object B is less than about (19/24) g/mL, its volume may very well be larger than that of object A.

4 0
4 years ago
A 1800 kg car moving south at 17.5 m/s collide with a 2800 kg car moving north. The cars stick together and move as a unit after
weqwewe [10]

Answer:

   v₀₂ = -2.67 m / s

Explanation:

Let's use the conservation of the moment, for this we define a system formed by the two cars.

Consider the north direction as positive and the subscript 1 will be used for car 1 and the subscript 2 for the second car

Initial instant. Before the crash

          p₀ = -m₁ v₀₁ + m₂ v₀₂

Final moment. Right after the crash

          p_f = (m₁ + m₂) v

           p₀ = p_f

           -m₁ v_{o1} + m₂ v_{o2} = (m₁ + m2) v_{f}

         v₀₂ = \frac{(m_1 +m_2) v }{m_2}+  \frac{m_1 v_{o1}  }{m_{1} }

 

let's calculate

          v₀₂ = \frac{(1800 +2800) 5.22 + 1800 (-17.5)}{2800}

          v₀₂ = -2.67 m / s

the negative sign indicates that the carriage moves in the opposite direction of the temperies

8 0
3 years ago
A molecule that speed up a reaction
Diano4ka-milaya [45]

Answer:

I think it's a catalyst.

Explanation:

Definition: a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

6 0
3 years ago
Read 2 more answers
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