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2 years ago

Which causes a rainbow in the sky?

1 answer:

7 0

Sunlight (white light) refracts through droplets of water in the atmosphere and this causes a rainbow in the sky. The correct option among all the options that are given in the question is the third option or option "C". The rainbow is caused by the reflection, refraction and dispersion of sunlight in water droplets that are present in the atmosphere.

You might be interested in

Why do we always use water as a reference material when determining the relative density of a substance

enyata [817]

Answer:

Specific gravity for liquids is nearly always measured with respect to water at its densest

Explanation:

8 0

1 year ago

Read 2 more answers

If the pH of a solution decrease's, is the solution getting more acidic or lees acidic

enyata [817]

Answer:

The solution becomes more acidic.

Explanation:

As the pH of a solution decreases, the concentration of hydrogen ions [H+] increases. Acidic solutions have a higher concentration of hydrogen ions and a lower pH.

I hope this helped. :)

6 0

2 years ago

A bicycle racer rides from a starting marker to a turnaround marker at 10 m/s. She then rides back along the same route from the

andrew11 [14]

Given :

A bicycle racer rides from a starting marker to a turnaround marker at 10 m/s.

She then rides back along the same route from the turnaround marker to the starting marker at 25 m/s.

To Find :

Her average speed for the whole race.

Solution :

We know, average velocity is given by :

$Average \ Velocity = \dfrac{v_1 + v_2}{2}\\\\Average\ Velocity = \dfrac{10 + 25}{2}\\\\Average \ Velocity = \dfrac{35}{2}\\\\Average \ Velocity = 17.5 \ m/s$

Therefore, average speed for the whole race is given by 17.5 m/s.

3 0

2 years ago

a large punch bowl holds 3.95 kg of lemonade (which essentially is water) at 20.0 degrees celsius. A 45 gram ice cube at -10.2 d

TEA [102]

Answer: $19 ^{\circ}$

Explanation:

Given

mass of water $(m_w) 3.95 kg$

Temperature of water is $20^{\circ} C$

mass of ice $(m_i) =45 gm$

Temperature of ice $=-10.2 ^{\circ} C$

specific heat of water $4.18 kJ/kg-K$

specific heat of ice $2.22 kJ/kg-K$

Latent heat of fusion(L) $3.4\times 10^5 J/kg$

Heat absorb by water when ice completely converts to water

$Q=mc_{ice}\delta T+mL$

$Q=0.045\times 2.22\times (0+10.2)+0.045\times 3.4\times 100$

Q=1.01898+15.3=16.3189 KJ

thus temperature of water will be

$3.95\times 4.18\times (20-T)=16.3189$

$T=19.011\approx 19^{\circ} C$

7 0

3 years ago

A proton of mass and a charge of is moving through vacuum at a constant velocity of 10000 directly to the east when it enters a

earnstyle [38]

Complete Question

A proton of mass mp= 1.67×10−27 kg and a charge of qp= 1.60×10−19 C is moving through vacuum at a constant velocity of 10,000 m/s directly to the east when it enters a region of uniform electric field that points to the south with a magnitude of E = 3.62e+3 N/C . The region of uniform electric field is 5 mm wide in the east-west direction. How far (in meters) will the proton have been deflected towards the south by the time it exits the region of uniform electric field. You may neglect the effects of friction and gravity, and assume that the electric field is zero outside the specified region. Answer is to be in units of meters

Answer:

$s = 0.039 \ m$

Explanation:

From the question we are told that

The mass of the proton is $m = 1.67 *10^{-27} \ g$

The charge of on the proton is $q = 1.60 *10^{-19} \ C$

The speed of the proton is $v = 10000 \ m/s$

The magnitude of the electric field is $E = 3.62*10^{3 } \ N/C$

The width covered by the electric field $d = 5mm = 5 *10^{-3} \ m$

Generally the acceleration of the proton due to the electric toward the south (at the point where the force on the proton is equal to the electric force due to the electric field) is mathematically represented as

$a = \frac{q* E}{m}$