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nignag [31]
3 years ago
6

An example of sunlight passing through clouds during sunset results in what is often called the cloud's silver lining. Pastel sh

ades of blue, pink, purple, and green can be observed at times of cloud cover. What is the cause of these patterns in the sky?
Physics
2 answers:
Furkat [3]3 years ago
8 0
Water in the atmosphere and within the clouds themselves cause light waves to refract and reflect, creating an assortment of colors. The patterns occur when light is absorbed by water droplets within the clouds. The amount of absorption that occurs depends on the temperature of the air.  The patterns occur when light is reflected from water droplets within the clouds. The amount of reflection that occurs depends on the wavelength of the light, and shorter wavelengths are reflected at a greater angle than longer ones. 

Hope this helps!!


IRINA_888 [86]3 years ago
6 0

Answer:

Answer is D

Explanation:

The patterns occur when light is diffracted from water droplets within the clouds. The amount of diffraction that occurs depends on the wavelength of the light, and shorter wavelengths are diffracted at a greater angle than longer ones.

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What does the speed of sound depend on?
mr Goodwill [35]
I believe it's 'A'. Hopefully this helps!~ :)
6 0
3 years ago
Read 2 more answers
Can someone answer these
LenKa [72]

Four

Sometimes I think the creators of problems out to drawn and quartered. 60 g does not mean 60 grams. It means 60 * the acceleration due to gravity.

So the question really reads. The acceleration delivered by the air bag is 60 times that of a normal gravitational. This acceleration is delivered to the person where his mass is putting up a whole lot of resistance because he and his 75 kg are moving forward with the impact of the car. The 36 msec. has nothing to do with the problem.

The Force of the Air Bag is mass * a

F_airbag = mass * acceleration = 75 kg * 60 * 9.81 mass * acceleration = 44145 newtons

The answer is 4.41 * 10^4

Answer C

Five

This problem is governed by one formula that you sort of have to get out of your hat -- a piece of magic if you will.

Fg - Bf = m * a

Fg = the Force of gravity

Bf = the braking force

The mass of the rocket is derived from its weight

The acceleration is derived from one of your big 4 equations.

m of the rocket = 75600 / 9.81 = 7706 kg

The acceleration =

vi = 1 km/s = 1000 m/s

vf = 0

t = 2 minute * 60 sec/ min = 120 seconds

a = (vf - vi)/t = (0 - 1000 m/s) / 120 sec

a = - 8.333 m/s^2 The minus sign makes perfect sense. Remember the rocket is slowing down

The net downward force = mass * acceleration = - 7706 kg * - 8.333 m/s^2

The net force = - 64217 N

So going back to the problem's equation we have

Gravitational force - Braking Force = Net Force

Gravitational Force = 75600

Net Force = - 64217

Bracking force = ?

75600 - Bracking force = - 64217  Subtract 75600 from both sides

- Bracking force = - 64217 - 75600

- Braking force = - 139817

Braking force = 139817 N = 1.398 * 10^5 N

Braking Force = 1.4 * 10^5

Answer: Last One.

Six

The first thing you should do is derive a general formula for this problem.

The force pulling both masses down is M*g where g is the acceleration due to gravity.

The formula for this problem is

Mg = (m + M) * a

Now you need to solve for a

a =  [M/(M + m) ] * g

Look what is happening. is a smaller or larger than g? This is a question you should really pay attention to. If it was larger, everyone would have this system in their basement because you'd get more energy output than you put in. Something for nothing is always appealing.

So what's the answer? (I get to ask it. No one posing the question ever should).

A

A is incorrect. M never goes away. The acceleration may get very tiny, but there always is some acceleration.

B must be true. It is just what I finished saying about A

C Who said anything about velocity? It's a red herring. If the velocity became 0 the acceleration would have to turn minus. This answer sounds good, but sounds good doesn't make it right. C is wrong.

D The acceleration does not remain constant no matter what. The answer to A still applies. So D is wrong.

4 0
3 years ago
What does physiological mean
velikii [3]

Answer: physiological  

ADJECTIVE

relating to the branch of biology that deals with the normal functions of living organisms and their parts.

"physiological research on the causes of violent behavior"

relating to the way in which a living organism or bodily part functions.

"slow down your body's physiological response to anger by breathing deeply"

Explanation:

6 0
3 years ago
A solenoid 27.0 cm long and with a cross-sectional area of 0.600 cm2 contains 440 turns of wire and carries a current of 90.0 A.
11Alexandr11 [23.1K]

Answer:

(A) 0.1842 T (B) 1.3507\times 10^{-4}J/m^3 (C) 0.2188 J (D) 5.40\times 10^{-5}H

Explanation:

Length of the solenoid L = 27  cm =0.27 m

Area of cross section A=0.6\ cm^2=0.6\times 10^{-4}m^2

Number of turns N = 440

Current i = 90 A

(A) Magnetic field in the solenoid B=\mu _0ni=\frac{\mu _0Ni}{l}=\frac{4\pi \times 10^{-7}\times 440\times 90}{.27}=0.1842\ T

(B) The energy density is given by energy\ density =\frac{B^2}{2\mu _0}=\frac{0.1842^2}{2\times 4\pi \times 10^{-7}}=1.3507\times 10^4\ j/m^3

(C) The total energy contained in the coli magnetic field = energy density ×volume = energy density ×l×A

So the total energy =1.3507\times 10^4\times 0.27\times 0.6\times 10^{-4}=0.2188\ j

(D) The energy stored in the inductor is given by U=\frac{1}{2}Li^2

So L=\frac{2U}{i^2}=\frac{2\times 0.2188}{90^2}=5.40 \times 10^{-5}H

7 0
3 years ago
Ordinary glasses are worn in front of the eye and usually 2.00 cm in front of the eyeball. A certain person can see distant obje
Lelu [443]

Answer:

The focal length is 15.549 cm

The power of the lens is 0.0643 D

Solution:

As per the question:

The near point is 50.0 cm

Distance of the glasses from the eyeball, d = 2.00 cm

The near point of a normal human eye is 25 cm

Now,

The image distance, v' = 50.0 - 2.00 = 48.0 cm

The object distance, u' = 25.0 - 2.00 = 23.0 cm

Now, using the Lens maker formula to calculate the focal length:

\frac{1}{f} = \frac{1}{u'} + \frac{1}{v'}

\frac{1}{f} = \frac{1}{48.0} + \frac{1}{23.0} = 0.0643

f = 15.549 cm

Now, the power of the lens in diopters is given by:

P = \frac{1}{f} = \frac{1}{15.549} = 0.0643 D

7 0
3 years ago
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