3 years ago

Examine the following equation.

Physics

1 answer:

alex41 [277]3 years ago

6 0

Answer:

E)brain decay

Explanation:

Looking at the question causes it.

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What is the resistance of a 1.3-m-long copper wire that is 0.30 mm in diameter?

laiz [17]

The resistance R of a wire is given by:
$R= \frac{\rho L}{A}$
where
$\rho$ is the resistivity of the material
L is the length of the wire
A is the cross-sectional area of the wire.

For the wire in the problem, the resistivity is (copper resistivity) $\rho=1.68 \cdot 10^{-8} \Omega m$ . The length of the wire is L=1.3 m, while the cross-sectional area is
$A=\pi r^2 = \pi ( \frac{d}{2})^2 = \pi ( \frac{0.30 \cdot 10^{-3} m}{2} )^2 =7.07 \cdot 10^{-8} m^2$

so the resistance of the wire is:
$R= \frac{(1.68 \cdot 10^{-8} \Omega m)(1.3 m)}{7.07 \cdot 10^{-8} m^2}=0.31 \Omega$

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3 years ago

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Masja [62]

Your answer is point F

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3 years ago

What is the best description of the destructive interference of light?

timama [110]

Answer:

Sorry if I am late but its A. The crest of one wave overlaps with the trough of another.

Explanation:

Just trust me lol and its on k12

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Why there are not green stars?

s2008m [1.1K]

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3 years ago

A basketball has a coefficient of restitution of 0.821 in collisions with the wood floor of a basketball court. The ball is drop

Tanya [424]

Answer: The height of its fourth bounce = 0.43m

Explanation:

The coefficient of restitution denoted by (e), is the ratio that shows the final velocity to initial relative velocity between two objects after collision

IT is given by the formula in terms of height as

Coefficient of Restitution, e = √(2gh))/√(2gH) = √(h/H)

Where

Coefficient of Restitution, e= 0.821

H = 2.07 m

At fourth bounce , we have that

Coefficient of Restitution, e⁴ =√(h₄/H)

Putting the given values and solving , we have,

e⁴ =√(h₄/H)

= 0.821⁴ = √(h₄/2.07)

(0.821⁴ )² =h₄/2.07

0.2064 x 2.07 = 0.427 = 0.43

At fourth bounce, h₄ height = 0.43m

7 0

3 years ago