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3 years ago

What is the loudness, in decibels, of a sound 1 trillion times as loud as the softest audible sound?

Physics

1 answer:

Rufina [12.5K]3 years ago

5 0

Answer:

What is the loudness, in decibels, of a sound 100 trillion times as loud as the softest audible sound? The loudness of this sound in decibels is dB. (Type an integer or a decimal.)

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If we push a piece of furniture to move it but we don't manage to move it, are forces acting on

zubka84 [21]

Answer:

Yes

Explanation:

Forces are pushing such as gravity, and forces from your own body and the couch are pushing against each other.

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3 years ago

The quantum state of a particle can be specified by giving a complete set of quantum numbers (n,l, ml, ms). How many different q

Delvig [45]

Answer:

number of quantum states = 8

Explanation:

To find the total number of allowed states you take into account the following relations:

$l=n-1\\\\m_l=-l,-(l-1),...,0,,,,(l-1),l$

in this case you have:

$n=2\\\\l=0,1\\\\m_0=0\\\\m_1=-1,0,1$

furthermore, for each n,l,ml quantum state you have two additional states due to the spin of the electrons.

then, you have (n,l,ml) = (2,0,0), (2,1,-1), (2,1,0), (2,1,1) and with the spin:

number of quantum states = 2*(1+3) = 8

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3 years ago

The satellite image above shows several barrier islands offshore from the Gulf Coast of the southern United States. Over time, w

Yuliya22 [10]

Submerge these islands underwater

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3 years ago

I don’t know the answer <br><br> Help me please

lubasha [3.4K]

Answer:

Explanation:

i wanna say its B but if im wrong sorry i tried

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3 years ago

Equipotentials are lines along which Select one: a. the electric field is constant in magnitude and direction. b. the electric c

soldi70 [24.7K]

Answer:

option D is correct

Explanation:

It is important to note that equipotential lines are always perpendicular to electric field lines. No work is required to move a charge along an equipotential, since ΔV = 0. Thus the work is :

W = −ΔPE = −qΔV = 0.

Work is zero if force is perpendicular to motion. Force is in the same direction as E, so that motion along an equipotential must be perpendicular to E. More precisely, work is related to the electric field by:

W = Fd cos θ = qEd cos θ = 0.

- The change in kinetic energy Δ K.E by conservation should be:

Δ K.E = W

Since, W = 0:

Δ K.E = 0

- If change in kinetic energy is zero it means that charge moves at a constant speed. Hence, option D is correct.

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3 years ago