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4 years ago

What forms when moisture evaporates into the air and then cools

Physics

1 answer:

musickatia [10]4 years ago

3 0

Answer:

Clouds

Explanation:

In an area, where the temperature is relatively high, then the warm air rises upward due to its less density. As these air rises upward, the air cools due to the decreasing temperature with the increasing height. There comes such a point where the air is not capable of holding any more water vapor, and it cools below the dew point. This process eventually leads to the formation of clouds in the sky, and with further cooling, the tiny droplets are formed, resulting in the occurrence of rain.

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A man pushes a boulder with a mass of 50kg from rest to a final velocity of 3

professor190 [17]

Answer:

Power = 56.25 W

Explanation:

Power = workdone/time taken

We are given;

Mass; m = 50 kg

Final velocity; v = 3 m/s

Time; t = 4 s

Workdone = ½mv² = 1/2 × 50 × 3²

W = 25 × 9

W = 225 J

Thus;

Power = 225/4

Power = 56.25 W

4 0

3 years ago

Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the absorption of the highest-energy

8_murik_8 [283]

Answer:

The <em><u>n = 2 → n = 3</u></em> transition results in the absorption of the highest-energy photon.

Explanation:

$E_n=-13.6\times \frac{Z^2}{n^2}ev$

Formula used for the radius of the $n^{th}$ orbit will be,

where,

$E_n$ = energy of $n^{th}$ orbit

n = number of orbit

Z = atomic number

Here: Z = 1 (hydrogen atom)

Energy of the first orbit in H atom .

$E_1=-13.6\times \frac{Z^2}{1^2} eV=-13.6 eV$

Energy of the second orbit in H atom .

$E_2=-13.6\times \frac{Z^2}{(2)^2} eV=-3.40 eV$

Energy of the third orbit in H atom .

$E_3=-13.6\times \frac{Z^2}{(9)^2} eV=-1.51 eV$

Energy of the fifth orbit in H atom .

$E_5=-13.6\times \frac{Z^2}{(2)^2} eV=-0.544 eV$

Energy of the sixth orbit in H atom .

$E_6=-13.6\times \frac{Z^2}{(2)^2} eV=-0.378 eV$

Energy of the seventh orbit in H atom .

$E_7=-13.6\times \frac{Z^2}{(2)^2} eV=-278 eV$

During an absorption of energy electron jumps from lower state to higher state.So, absorption will take place in :

1) n = 2 → n = 3

2) n= 5 → n = 6

Energy absorbed when: n = 2 → n = 3

$E=E_3-E_2$

$E=(-1.51 eV) -(-3.40 eV)=1.89 eV$

Energy absorbed when: n = 5 → n = 6

$E'=E_6-E_5$

$E'=(-0.378 eV)-(-0.544 eV) =0.166 eV$

1.89 eV > 0.166 eV

E> E'

So,the n = 2 → n = 3 transition results in the absorption of the highest-energy photon.

4 0

3 years ago

Explain mantle convection.

inysia [295]

Answer:

Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. The Earth's surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle.

Explanation:

7 0

2 years ago

A coil is connected to a 100v d.c. supply and takes a current of 10A. Calculate the value of the resistance of the coil

rodikova [14]

Resistance = (voltage) divided by (current)

Resistance = (100 volts) / (10 Amperes) = 10 ohms

3 0

4 years ago

The graph above shows the position x as a function of time for the center of mass of a system of particles of total mass 6. 0 kg

kumpel [21]

The resulting change in momentum of the system will be +18.6 Ns. The momentum is conserved.

<h3>What is the law of conservation of momentum?</h3>

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

m is the mass =6.0 kg

t is the time interval=2 second

From Newton's second law;

$\rm \triangle P =m \triangle V \\\\ \triangle P= m(\frac{\triangle x}{\triangle t} )\\\\$