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2 years ago

The big bang theory states that the universe is approximately _________. Which number best completes the sentence

Physics

1 answer:

taurus [48]2 years ago

3 0

Answer:

Answer below!!

Explanation:

In short,the Big Bang hypothesis states that all of the current and past matter in the Universe came into existence at the same time,roughly 13.8 billion years ago.At this time,all matter was compacted into a very small ball with infinite density and intense heat called a Singularity.

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A rod has a radius of 10 mm is subjected to an axial load of 15 N such that the axial strain in the rod is ????௫ = 2.75*10-6, de

EleoNora [17]

Answer:

Knowing we only have one load applied in just one direction we have to use the Hooke's law for one dimension

ex = бx/E

бx = Fx/A = Fx/π $r^{2}$

Using both equation and solving for the modulus of elasticity E

E = бx/ex = Fx / π $r^{2}$ ex

E = $\frac{15}{pi (10 * 10^{-3})^{2} * 2.75 * 10^{-6} } = 17.368 * 10^{9} Pa = 17.4 GPa$

Apply the Hooke's law for either y or z direction (circle will change in every direction) we can find the change in radius

ey = $\frac{1}{E}$ (бy - v (бx + бz)) = $-\frac{v}{E}$ бx

= $\frac{vFx}{Epir^{2} }$ = $\frac{0.23 * 15}{pi (10 * 10^{-3)^{2} } * 17.362 * 10^{9} } = -0.63 *10^{-6}$

Finally

ey = Δr / r

Δr = ey * r = 10 * $-0.63* 10^{-6} mm = -6.3 * 10^{-6} mm$

Δd = 2Δr = $-12.6 * 10^{-6} mm$

Explanation:

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3 years ago

A bus starts from village A at 7:00 am and reaches village B at 8:30 am. If the distance between the villages A and B is 60 km.

SVEN [57.7K]

1.1111111111

Explanation:

v=s/t

t=8:30-7:00=1:30

convert to second=5400second

s=60km covert to meter=6000

6000/5400=1.11111111

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2 years ago

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nadya68 [22]

The answer is (A) the object must be at rest.

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Yes, the direction might also change under some special circumstances.

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3 years ago

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The baseball bat not the baseball

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3 years ago

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marshall27 [118]

The best choice would be letter C hope this helps

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3 years ago

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