3 years ago

Because not all stars are the same distance from earth, it can be difficult to determine?

Physics

2 answers:

Inessa [10]3 years ago

8 0

I think answer is A. The Brightness of a Star

ehidna [41]3 years ago

8 0

The answer is b because some star are really bright which make us think that they are close but they are probably really far

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Which two atmospheric gases do not react with many substances?

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4 years ago

Compute the density in g/cm^3 of a piece of metal that had mass of 0.485 kg and a volume of 52cm^3

steposvetlana [31]

Answer:

9.3 g/cm³

Explanation:

First, convert kg to g:

0.485 kg × (1000 g / kg) = 485 g

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3 years ago

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3 years ago

Read 2 more answers

A 16 pound weight attached to a spring exhibits simple harmonic motion. Determine the equation of motion if the spring constant

yarga [219]

Answer:

T = 2.82π s

x = Acos(0.71t)

Explanation:

This problem can be solved by using the expressions

$T = 2\pi \sqrt{\frac{m}{k} }$ ( 1 )

$x=Acos(\omega t) = Acos(\frac{2\pi }{T}t )$ ( 2 )

where T is the period of oscillation of the system, m is the mass of the object attached to the spring, k is the spring constant and x is the position of the object.

By replacing in the expression (1):

$T=2\pi \sqrt{\frac{16 lb}{8lb/ft}} = 2.82\pi s$

Taking 6 inches as the amplitude of the motion, we have

$x=6cos(\frac{2\pi }{2.82\pi }t ) = 6cos(0.71t)$

I hope this is useful for you

Regards

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3 years ago