3 years ago

Which spacecraft appears the longest to an outside observer? W X Y Z

Physics

2 answers:

Ivenika [448]3 years ago

7 0

Answer:

Explanation:

pychu [463]3 years ago

3 0

Answer:

The correct answer is Y

I did on quiz and got it

Explanation:

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3 years ago

A solenoid with 3,000.0 turns is 70.0 cm long. If its self-inductance is 25.0 mH, what is 5) its radius? (The value of o is 4 ×

Elan Coil [88]

The self-inductance of a solenoid is given by:
$L= \frac{\mu_0 N^2 A}{l}$
where
$\mu_0$ is the vacuum permeability
N is the number of turns
A is the cross-sectional area of the solenoid
l is the length of the solenoid

For the solenoid in our problem, N=3000, l=70.0 cm=0.70 m and the self-inductance is L=25.0 mH=0.025 H, therefore the cross-sectional area is
$A= \frac{Ll}{\mu N^2}= \frac{(0.025 H)(0.70 m)}{(4\pi \cdot 10^{-7}N/A^2)(3000)^2}= 1.55 \cdot 10^{-3}m^2$
And since the area is related to the radius by
$A=\pi r^2$
The radius of the solenoid is
$r= \sqrt{ \frac{A}{\pi} } = \sqrt{ \frac{1.55 \cdot 10^{-3} m^2}{\pi} } =0.022 m=2.2 cm$

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3 years ago

Which line represnts object moving fastest<br>**WILL MARK BRAINLEST ANSWER, IF RIGHT**

balu736 [363]

Line - A: (15/10) = 1.5 inch/second

Line - B: (0/10) = 0

Line - C: (10/10) = 1.0 inch/second

Line - D: (-25/20) = -1.25 inch/second

<em>Line-A</em> represents the greatest speed.

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3 years ago

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Taya2010 [7]

well you can calculate energy by using

E=MC^2

E= energy

m= mass

c^2= speed of light

but it depends on the question

i hope this helped :)

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4 years ago

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Can I get some help please? I REALLY need it!

MrRissso [65]

I think it is c hope this helps

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