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Andreas93 [3]
3 years ago
6

A person with mass 65 kg, standing still, throws an object at 4 m/s. If the

Physics
1 answer:
fenix001 [56]3 years ago
7 0

Explanation:

Momentum before = momentum after

m₁ u₁ + m₂ u₂ = m₁ v₁ + m₂ v₂

(65 kg) (0 m/s) + m (0 m/s) = (65 kg) (-3.5 m/s) + m (4 m/s)

m ≈ 57 kg

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klasskru [66]

Answer:

The red car would experience the greatest acceleration.

Explanation:

Newton says that Force equals mass times acceleration or F = ma

We get a = F/m

If we want the greatest acceleration or a, mass or m must be the lowest.

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3 years ago
Which is a compound<br> A Kr<br> B O<br> 2<br><br> c cl2<br> d CuF2
Volgvan
I think the answer is CuF2
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3 years ago
You are an electrician installing the wiring in a new home. The homeowner desires that a ceiling fan with light kits be installe
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Answer:

3 fans per 15 A circuit

Explanation:

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(60 * 4)/120 = 240/120 = 2 A.

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2 A + 1.8 A = 3.8 A.

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0.8 * 15 A = 12 A.

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3 years ago
List the 4 things technology can be.
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6 0
3 years ago
Read 2 more answers
An woman whose weight is 804 N stands on a long horizontal plank of wood 1.55 m from one end. The plank is uniform and is suppor
meriva

Answer:

Explanation:

There will be reaction force by  each vertical post on horizontal plank . Let it be R₁ and R₂ . R₁ is reaction force by the post nearer to woman

Taking torque of all forces about the end far away from the woman

Torque by reaction force = R₁ x 5.5

= 5.5 R₁ upwards

Torque by weight of woman in opposite direction , downwards

= - 804 x ( 5.5 - 1.55 )

= - 3175.8

Torque by weight of the plank in opposite direction , downwards .

= - 27 x 5.5 / 2

= - 74.25

Torque by R₂ will be zero as it passes through the point about which torque is being taken .

Total torque

= 5.5 R₁ - - 3175.8 - - 74.25  = 0 ( For equilibrium )

5.5 R₁ = 3250

R₁ = 590.9 N .

6 0
3 years ago
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