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den301095 [7]
4 years ago
14

Why does a star grow larger after it exhausts its core hydrogen?

Physics
1 answer:
arlik [135]4 years ago
4 0

Because Helium fusion in a shell outside the core generates enough thermal pressure to push the upper layers outward.

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A cylindrical wire made of an unknown alloy hangs from a support in the ceiling. You measure the relaxed length of the wire to b
IceJOKER [234]

Answer: hello  some of your values are wrongly written hence I will resolve your question using the right values

answer:

stiffness =  1.09 * 10^-6 N/m

Explanation:

Given data:

Length ( l ) = 16 m

radius of wire ( r ) = 3.5 m

mass ( m ) = 5kg

<u>Distance stretched (  Δl ) = 4 * 10^-3 m </u> ( right value )

<u>average bond length ( between atoms ) = 2.3 * 10^-10 m </u>( right value)

first step : calculate the area

area ( A ) = πr^2 = π * ( 3.5)^2 = 38.48 m^2

        γ          = MgL / A Δl

                    = [ (5 * 9.81 * 16 ) / ( 38.48 * (4.3*10^-3) ) ]

                    = 784.8 / 0.165 = 4756.36 N/m^2

hence : stiffness =   γ  * bond length

                           =  4756.36 * 2.3 * 10^-10  = 1.09 * 10^-6 N/m

8 0
3 years ago
solve the following system by any method 2x - 6y = 24 ... -5x + 6y = -6 ... A. (0,-6) B. (4,-1) C. (-6,-6) D. (6,-1)
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Using elimination, the answer is C. 
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Which marine habitats would have the least access to primary producers?
nikitadnepr [17]

Answer:

D

Explanation:

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2 years ago
Two or more atoms joined into a single particular form a(n)
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<span>Two or more atoms joined into a single particular form </span><span>a molecule</span>
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Splash back into the ocean or river
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