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Stells [14]
3 years ago
10

Meteors start to break up in the stratosphere true or false​

Physics
2 answers:
Phantasy [73]3 years ago
8 0

Answer:

false

Explanation:

Those meteors are burning up in the mesosphere

ohaa [14]3 years ago
5 0
It’s true, meteors break up as the fall from the stratosphere.
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Chemotherapy is used to treat
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Cervical cancer

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Which statement is true about vectors?
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Vectors need direction and magnitude to exist, otherwise, it becomes scalars that do not require direction to be expressed.

eg - Velocity is a vector as it needs direction, but speed is scalar and does not need direction

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When atoms form a bond, it is usually because each atom acquires a more stable arrangement of electrons in its electron shells.
liraira [26]
C. Usually when an atom loses or gains an electron, it is because it is trying to satisfy the Octet Rule. The Octet Rule states that an atom is at its stablest when it has 8 valence electrons (two in helium's case)

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3 years ago
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Which of the following is a true statement?
lukranit [14]

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LAST ONE

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A wire 40cm long and of diameter 0.60mm has a resistance of 1.5 ohm what is the resistivity of the material of which it is made
zavuch27 [327]

Answer:

The resistivity of the wire is 1.05\times 10^{-6}\ \Omega-m

Explanation:

We have,

Length of a wire is 40 cm or 0.4 m

Diameter of a wire is 0.60 mm

Radius is 0.3 mm or 0.0003 m

Resistance of a wire is 1.5 ohm

Now we need to find the resistivity of the material of which it is made. The resistance of a wire in terms of its resistance, length and area is given by :

R=\rho \dfrac{l}{A}

\rho = resistivity

\rho=R \dfrac{\pi r^2}{l}\\\\\rho=1.5\times  \dfrac{3.14\times (0.0003 )^2}{0.4}\\\\\rho=1.05\times 10^{-6}\ \Omega-m

So, the resistivity of the wire is 1.05\times 10^{-6}\ \Omega-m.

3 0
3 years ago
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