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Tpy6a [65]
4 years ago
10

Which best explains parallel forces?

Physics
1 answer:
Lyrx [107]4 years ago
8 0
The answer is to this question is B
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Which statement describes the horizontal acceleration of a projectile? It is –9.8 m/s2. It is 9.8 m/s2. It is constant. It is ze
lina2011 [118]
In a projectile, the horizontal acceleration is zero. The velocity remains constant at all times. However, the <u>vertical acceleration</u> is -9.81m/s^2.

Hope this helps!
6 0
3 years ago
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What do astronomers mean when they say that we are all star stuff?.
tekilochka [14]

Answer:

low-mass star.

Explanation:

Pls, choose me as brainliest!

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3 years ago
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A copper transmission cable 140 {\rm km} long and 12.5 {\rm cm} in diameter carries a current of 115 {\rm A}.
SpyIntel [72]

Answer:

1. V=22.0407\ V

2. Q=9126837\ J

Explanation:

Given:

length of copper cable, l=140\ km=1.4\times 10^5\ m

diameter of copper cable, d=12.5\ cm=0.125\ m

current through the copper wire, i=115\ A

We have the resistivity of copper, \rho=1.68\times10^{-8}\ \Omega.m

<u>We know that the resistance of a wire is given as:</u>

R=\rho.\frac{l}{a}

where:

a= cross sectional area of the wire

R=1.68\times 10^{-8}\times\frac{140000}{\pi.\frac{0.125^2}{4} }

R=0.1917\ \Omega

1.

<u>Now from the  Ohm's law:</u>

V=R.i

V=0.1917\times 115

V=22.0407\ V

2.

<u>From the Joules law the thermal energy generated as an effect of electrical energy is mathematically given as:</u>

<u />Q=i^2.R.t

where:

t= time duration for which the current flows

Q=115^2\times 0.1917\times 3600 (∵ we have 3600 seconds in 1 hour)

Q=9126837\ J

5 0
3 years ago
Plz help with these 5 The backbone is made up of 26 small bones called ___________. What are the characteristics of bones? (list
spin [16.1K]

Answer:

The backbone, spine or vertebral column is made up of 26 small bones called the vertebrae.

The characteristics of bones include:

1. They are strong and rigid

2. They are composed of bone cells called osteocytes.

3. They are lightweight

4. They have a honeycomb-like matrix internally, which helps to give them rigidity.

5. They exist in various types and shapes.

6. They have the ability to grow and repair when damaged

7. They contain inorganic minerals such as calcium and phosphate

The two types of joints are the movable and immovable joints.

Ligaments are bands of tough elastic fibrous tissue around that found around the joints whose function is to link bone to bone, give support to joints as well as limit their movement.

Explanation:

The backbone, spine or vertebral column is made up of 26 small bones called the vertebrae. The 26 small bones include 24 separate vertebrae interspaced with cartilage, and then additionally the sacrum and coccyx. The vertebral column is divided into five regions: cervical, thoracic, lumbar, sacral and coccygeal regions.

A bone is a rigid tissue that is part of the skeleton in vertebrate animals. The characteristics of bones include:

1. They are strong and rigid

2. They are composed of bone cells called osteocytes.

3. They are lightweight

4. They have a honeycomb-like matrix internally, which helps to give them rigidity.

5. They exist in various types and shapes.

6. They have the ability to grow and repair when damaged

7. They contain inorganic minerals such as calcium and phosphate

Joints are the junctions where two bones meet. They serve various functions which include allowing for movement of the body and binding the skeleton together.

The two types of joints are the movable and immovable joints.

Ligaments are bands of tough elastic fibrous tissue around that found around the joints whose function is to link bone to bone, give support to joints as well as limit their movement.

4 0
3 years ago
When you heat ice on a hot stove, the ice melts. what is happening during this process?
masya89 [10]
Heat energy is being transferred
5 0
3 years ago
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