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3 years ago

4.

Physics

1 answer:

Nezavi [6.7K]3 years ago

7 0

The density of an object remains same irrespective of its shape, size and quantity.

Explanation:

Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. Even if you cut the object into a million pieces, they would still each have the same density. It is because density in an intensive property of matter.

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The modulus of elasticity for a ceramic material having 4.7 vol% porosity is 317 GPa. (a) Calculate the modulus of elasticity (i

elena-s [515]

Answer:

The answer is below

Explanation:

a) Given that the modulus of elasticity (E) = 317 GPa, to find the modulus of elasticity (in GPa) for the nonporous material ( $E_o$ ), we use the formula:

$E_0=\frac{E}{1-1.9P+0.9P^2}\\\\where\ P=4.7\%=0.047,hence:\\\\ E_0=\frac{317}{1-1.9(0.047)+0.9(0.047)^2}\\\\E_0=347.3\ GPa$

b) If the porosity P = 11.1%, then the modulus of elasticity is:

$E=E_0(1-1.9P+0.9P^2)=347.3(1-1.9(0.111)+0.9(0.111)^2)=278\ GPa$

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3 years ago

Assume that Parker Company will receive SF200,000 in 360 days. Assume the following interest rates:

Anna35 [415]

Answer:

b. $96,914

Explanation:

360-day borrowing rate = 5%

spot rate = 0.48

360-day deposit rate = 6%

Borrow at the rate of 5% to get

SF200,000/1.05 = $190,476.19

Convert at the spot rate of $0.48 to get

190,476.19*0.48 = $91,428.57

Invest at the interest rate of 6% to get

91,428.57/1.06 = 96,914.28

Therefore, Parker Company will receive $96,914 in 360 days.

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3 years ago

Resonance occurs when an object vibrating at or near the resonant frequency of a second object to vibrate. What form of waves ar

Ivanshal [37]

Answer:

Resonance depends on objects, this may happen for example when you play guitar in a given room, you may find that for some notes the walls or some object vibrate more than for others. This is because those notes are near the frequency of resonance of the walls.

So waves involved are waves that can move or affect objects (in this case the pressure waves of the sound, and the waves that are moving the wall).

this means that the waves are mechanic waves.

Now, in electromagnetics, you also can find resonance frequencies for electromagnetic waves trapped in things called cavities, but this is a different topic.

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3 years ago

((HELP!!)) The _______ stage of change occurs when you're aware that a problem exists and are seriously thinking about overcomin

FrozenT [24]

"you....are seriously thinking about overcoming it, but haven't yet made a commitment to take action."

so u are beyond precontemplation but not at preparation - ans is A.) Contemplation

6 0

4 years ago

What is the amplitude of the electric field of the light wave? express your answer with the appropriate units?

olga_2 [115]

The Amplitude is the Intensity of the wave, the power transferred by unit. The light wave has two components: electric field and magnetic field. With E is denoted the amplitude of the electric field ,with M the amplitude of the magnetic field. These fields stimulate force (F) to act on particle of electric charge which gives the intensity of the wave. The Force is expressed in units Newtons and the electric charge in coloumbs. That’s why the units of the intensity of the wave is newtons per coloumbs (N*C^-1).

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3 years ago