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3 years ago

3. 20P. The potential energy of a two particles is given by

Physics

1 answer:

Paul [167]3 years ago

3 0

Explanation:

The potential energy of two particles system will be given by the negative of work by gravitational force due to particle (1)as the second particle is brought from infinity : Gravitational potential energy Second particle is brought in the gravitation of first particle.

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In a sea community near the floor of the ocean, a great white shark summons a goby fish to attach itself under its stomach. The

lubasha [3.4K]

Answer:

Commensalism

Explanation:

Commensalism is one example of the behavior of a goby and shark.

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3 years ago

Read 2 more answers

A paperweight consists of a 8.55-cm-thick plastic cube. Within the plastic a thin sheet of paper is embedded, parallel to opposi

ella [17]

Answer:

$\mu=1.5322$

Explanation:

Given:

Thickness of the paperweight cube, $x=8.55\ cm$

apparent depth from one side of the inbuilt paper in the plastic cube, $i=4.02\ cm$

apparent depth from the other side of the inbuilt paper in the plastic cube, $i'=1.56\ cm$

Now as we know that refractive index is given as:

$\rm \mu=\frac{real\ depth}{apparent\ depth}$

Let the real depth form first side of the slab be, $d$

Then the depth from the second side of the slab will be, $d'=x-d=8.55-d$

Since refractive index for an amorphous solid is an isotropic quantity so it remains same in all the direction for this plastic.

$\mu=\mu'$

$\frac{d}{i} =\frac{d'}{i'}$

$\frac{d}{4.02}=\frac{8.55-d}{1.56}$

$d=6.1597\ cm$

Now the refractive index:

$\mu=\frac{d}{i}$

$\mu=\frac{6.1596}{4.02}$

$\mu=1.5322$

7 0

3 years ago

Four monitoring wells have been placed around a leaking underground storage tank. The wells are located at the corners of a 1-ha

Readme [11.4K]

Answer:

direction : West to East

magnitude : 6.0 * 10^-3

Explanation:

Given data :

Four ( 4 ) monitoring wells

location of wells = corners of 1-ha square

Total piezometric head in each well ;

NE corner = 30.0 m ;

SE corner = 30.0 m;

SW corner = 30.6 m;

NW corner = 30.6 m.

Calculate for the magnitude and direction of the hydraulic gradient

first step ; calculate for area

Area = ( 1 -ha ) ( 10^4 m^2/ha )

= 1 * 10^4 m^2

Distance between the wells = length of side

= √( 1 * 10^4 ) m^2

= 100 m

Direction of Hydraulic gradient is from west to east because the total piezometric head in the west = Total piezometric head in the east

Next determine The magnitude of the hydraulic gradient

= ( 30.6 - 30 ) / 100

= 6.0 * 10^-3

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3 years ago

What causes scoliosis

klemol [59]

Answer:

Scoliosis is a sideways curvature of the spine. Scoliosis is a sideways curvature of the spine that occurs most often during the growth spurt just before puberty. While scoliosis can be caused by conditions such as cerebral palsy and muscular dystrophy, the cause of most scoliosis is unknown.

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3 years ago

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Suppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. T

raketka [301]

Answer:

ΔL =0. 000312 m

Explanation:

Given that

At room temperature ( T = 25 ∘C) ,L= 1 m

$L=1+2.4\times 10^{-5}T$

So the length at 13.0 ∘C above room temperature

$L=1+2.4\times 10^{-5}T$

$L=1+2.4\times 10^{-5}\times 13$

L=1.000312 m

So the change in length

ΔL = 1.000312 - 1.0000 m

ΔL =0. 000312 m

4 0

3 years ago