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Sedaia [141]
3 years ago
13

HURRY!!!!

Physics
2 answers:
nevsk [136]3 years ago
7 0

Answer:

light strikes the grooves → different wavelengths of light bend at different angles → diffracted wavelength reach the eyes → the eyes see different colors

Explanation:

A light is a combination of colors which can be separated appropriately by the use of diffraction grating. Diffraction grating is an optical device that splits and diffracts light into several beams and colors with respect to their wavelength. The size of the grooves  and wavelength determine the direction of dispersion.

Bingel [31]3 years ago
4 0
I'm not exactly sure but I'm thinking that it's the last one. Sorry if I'm wrong
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How many electrons are in an element with an atomic number of 20 and an atomic mass of 40? options: ANSWER FOR BRAINLIES
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What has become an important alternative to Piagetian approaches?
Mice21 [21]

<u>Answer:</u>

<em>Due to the shortcomings in Piaget’s approach to cognitive development several other theories were put forward.</em>

<u>Explanation:</u>

Jean Piaget is the psychologist that offered explanations about cognitive development in children. There were several shortcomings in his theories and thus alternative theories about cognitive <em>development in children </em>were developed.

<em>Lev Vygotsky</em> proposed another explanation to children’s cognitive development. He strongly emphasized on the influence of culture on <em>children’s cognitive development</em>. He believes that it is through socio-cultural interactions development progresses.

He believed that individualized thoughts begin after these interactions. He take on <em>self-speech </em> was different from Piaget. Vygotsky considered self-speech as a guide to thinking while Piaget thought <em>self-speech  to be egocentric. </em>

7 0
4 years ago
A viscous fluid is flowing through two horizontal pipes. The pressure difference P1 - P2 between the ends of each pipe is the sa
777dan777 [17]

Answer:half of shorter Pipe

Explanation:

Fluid is Flowing through two horizontal pipes with pressure difference

P_1-P_2=\Delta P

Both pipes have same radius

Length of one Pipe is twice of other

Let Longer Pipe be denote by 1 and smaller by 2

From Hagen Poiseuille equation

\Delta P=\frac{128\mu L\cdot Q}{\pi D^4}

Where \mu =viscosity of medium

L=length of Pipe

Q=discharge

D=diameter

For longer Pipe

\Delta P=\frac{128\mu 2L\cdot Q_1}{\pi \cdot D^4}----1

For smaller Pipe

\Delta P=\frac{128\mu L\cdot Q_2}{\pi \cdot D^4}------2

From  1 &  2 we get

2L\cdot Q_1=L\cdot Q_2

Q_2=2Q_1

volume flow rate of longer pipe is half of smaller pipe

6 0
3 years ago
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