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3 years ago

Soil can best be described as the

1 answer:

5 0

<span>The Earth has 4 layers: the outer crust that we live on and that consist of different types of soil, the plastic like mantle, the liquid outer core abd the solid inner core. So, soil is the covering of weathered rocks and decaying organing matter of the first layer of the Earth. This mixture f minerals (rocks, sand, clay), air, water and organic material supports life on Earth.</span>

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2. A student was sitting on one end of a set of metal bleachers outside of a school building. A drumline was practicing on the o

matrenka [14]

The students can feel the vibrations from the bleachers, but not from the drums because of the resonance.

<h3>What is the resonance?</h3>

The resonance condition occurs when the frequency of a wave matches with the resonance frequency.

The transfer of energy becomes maximum when the natural frequency matches with the frequency generated by the source.

The bleacher and student together having the frequency matching with the resonance frequency of the drum.

The bleacher and student with the bag frequency doesn't match with the resonance value of drums. Secondly, as distance increases sound intensity also decreases.

Thus, the student can feel the vibrations from the bleachers, but not from the drums because of the resonance.

Learn more about resonance.

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6 0

2 years ago

A 6 kg block is sliding down a horizontal frictionless surface with a constant speed of 5 m/s. It then slides down a frictionles

BARSIC [14]

Answer:

5in

Explanation:

4 0

4 years ago

Which of the following is NOT an example of an extensive physical property?

Step2247 [10]

D. density is your answer because density is an intensive property. By the way is this for FLVS?

7 0

3 years ago

Read 2 more answers

Suppose you left your lawn mower out all winter, and it is very rusty. Of your 250,000J of work, only 100,000J go towards cuttin

mihalych1998 [28]

Efficiency =

   (useful work you get out of it) / (work you put into it)

   = (100,000 J) / (250,000 J)

   =    0.4 = 40%    (choice-A)

7 0

3 years ago

The "size" of the atom in Rutherford's model is about 1.0 x 10^−10 m. (a) Determine the attractive electrostatic force between a

bazaltina [42]

Answer:

(a) $2.31\times10^{-8}\ N$

(b) $1.44\times 10^{-19}\ eV$

Explanation:

Given:

*p = charge on proton = $1.602\times 10^{-19}\ C$

*e = magnitude of charge on an electron = $1.602\times 10^{-19}\ C$

*r = distance between the proton and the electron in the Rutherford's atom = $1.0\times 10^{-10}\ m$

Part (a):

Since two unlike charges attract each other.

According to Coulomb's law:

$F=\dfrac{kqe}{r^2}\\\Rightarrow F = \dfrac{9.0\times 10^{9}\times 1.602\times 10^{-19}\times 1.602\times 10^{-19}}{(1.0\times 10^{-10})^2}\\\Rightarrow F = 2.31\times 10^{-8}\ N$

Hence, the attractive electrostatic force of attraction acting between an electron and a proton of Rutherford's atom is $2.31\times 10^{-8}\ N$ .

Part (b):

Potential energy between two charges separated by a distance r is given by:

$U= \dfrac{kqQ}{r}$

So, the potential energy between the electron and the proton of the Rutherford's atom is given by:

$U = \dfrac{kqe}{r}\\\Rightarrow U = \dfrac{9\times 10^{9}\times1.602\times 10^{-19}\times e}{1.0\times 10^{-10}}\\\Rightarrow U = 1.44\times 10^{-19}\ eV$

Hence, the electrostatic potential energy of the atom is $1.44\times 10^{-19}\ eV$ .

3 0

4 years ago