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sergey [27]
4 years ago
15

Explain what the core muscles do and why it's important to have a strong set of core muscles.

Physics
1 answer:
Alika [10]4 years ago
7 0

Answer:

Since your spine runs by your core, having a strong core will help protect and stabilize your spine, and you're also are able to control movements such as walking or standing better with a strong core.

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Explain the difference between how intrusive and extrusive igneous rock form and how those formation processes affect the minera
rusak2 [61]

Extrusive molten rocks are formed from lava while the intrusive molten rocks are formed from magma.

<u>Explanation:</u>

Extrusive molten rocks originate from lava, framing at the outside of the Earth and cooling rapidly, which means they structure little precious stones. Intrusive volcanic rocks originate from magma, shaping profound underground and taking more time to cool, which means they structure bigger crystals.

Intrusive molten rocks are framed when magma cools gradually underneath the surface, while extrusive rocks are shaped when magma cools quickly at the surface.

6 0
4 years ago
Church organs have a set of pipes with different lengths. With those different pipes organs can produce sounds over a wide range
Paraphin [41]

Answer: The shortest possible wavelength of sound the organ can produce is 0.224 m

Explanation:

To calculate the wavelength of light, we use the equation:

\lambda=\frac{c}{\nu}

where,

\lambda = wavelength of the light

c = speed of light = 331m/s

As wavelength and frequency follows inverse relation, shortest wavelength is produced by highest frequency.

\nu = highest frequency of light = 1.48kHz=1.48\times 10^3Hz=1.48\times 10^3s^{-1}       1Hz=1s^{-1}

\lambda=\frac{331m/s}{1.48\times 10^3s^{-1}}=0.224m

Thus the shortest possible wavelength of sound the organ can produce is 0.224 m

8 0
4 years ago
In a wire, when elongation is 4 cm energy stored is E. if it is stretched by 4 cm,
Serga [27]

Answer:

4E

Explanation:

From the question given above, the following data were obtained:

Initial elongation (e₁) = 4 cm = 4/100 = 0.04 m

Initial energy (E₁) = E

Final elongation (e₂) = 0.04 + 0.04 = 0.08 m

Final energy (E₂) =?

The energy stored in a s spring is given by:

E = ½Ke²

Where

E => is the energy

K => is the spring constant

e => is the elongation

From:

E = ½Ke²

Energy is directly proportional to the elongation. Thus,

E₁/e₁² = E₂/e₂²

With the above formula, we can obtain the final energy as follow:

Initial elongation (e₁) = 0.04 m

Initial energy (E₁) = E

Final elongation (e₂) = 0.08 m

Final energy (E₂) =?

E₁/e₁² = E₂/e₂²

E / 0.04² = E₂ / 0.08²

E / 0.0016 = E₂ / 0.0064

Cross multiply

0.0016 × E₂ = 0.0064E

Divide both side by 0.0016

E₂ = 0.0064E / 0.0016

E₂ = 4E

Therefore, the final energy is 4 times the initial energy i.e 4E

6 0
3 years ago
A tugboat pulls a ship with a constant net horizontal force of 50 N and causes the ship to move through a harbor. How much work
Vlad [161]

Answer:

1500J

Explanation:

Work done = Force * Distance

Work = ?

Force = 50N

Distance = 30m

Work = 50 * 30

Work  = 1500J

5 0
3 years ago
Match each key term with the correct definition.
oksano4ka [1.4K]

Answer:

Radioisotope -> An atom with an unstable nucleus

Radioactivity -> The spontaneous discharge of energy from an unstable nucleus

Radioactive Decay -> The process by which the nucleus of an unstable isotope changes

Strong Nuclear Force -> Binds protons and neutrons together in the nucleus

Explanation:

Just completed the question

8 0
3 years ago
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