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Anna
Subject: Science
, asked on 28/12/16
(a) with the help of a ray diagram, state the meaning of refraction of light. State Snell's law of refraction of light and also express it mathematically.
(b)The refractive index of water with respect to vacuum is 4/3 and refractive index of vacuum with respect to glass is 2/3. If the speed of light in glass is 2 into 10 raised to 8 ms raised to -1, find the speed of light in (i)vacuum (ii)water
Answer
3
Prasad
Subject: Science
, asked on 23/10/16
Which orbital gets filled first:
4
s
or
3
d
?
State the principle governing your answer.
Answer
5
Ashiq Ahamed
Subject: Science
, asked on 4/10/16
Balance the equation please Nitrogen reacts with hydrogen under pressure
Answer
1
Mansi Garg
Subject: Science
, asked on 26/9/16
what is the symbol of partial negative or partial positive
Answer
5
Vidhi
Subject: Science
, asked on 14/9/16
electron dot configuration of MgO
Answer
1
Yuktha Reddy
Subject: Science
, asked on 13/9/16
What happens when SO
2
is passed through water? Write a chemical equation for it.
Answer
4
Yash Gupta
Subject: Science
, asked on 9/1/17
electronic configuration of given elements Li,Na,K,Be,Mg,Ar
Answer
3
Sakshi Sharma
Subject: Science
, asked on 9/1/17
The atomic number of an element ‘X’ is 20.
Determine the position of the element ‘X’ in the periodic table
Write the formula of the compound formed when ‘X’ reacts/ combines with another element ‘Y’ (atomic number 8)
What would be the nature (acidic or basic) of the compound formed? Justify your answer.
Answer
4
Aswathi Ajith
Subject: Science
, asked on 4/1/17
In summer, the roof of a building gets very hot. Suggest a few ways by which people who live on the top floor of the building can protect themselves from the radiant heat of the sun?
Answer
8
Kay.
Subject: Science
, asked on 2/1/17
Why do valency first increases and then decreases along the period
Answer
4
J J
Subject: Science
, asked on 2/1/17
List the element of period 2 and write their electronic configuration
Answer
2
Subikshaa
Subject: Science
, asked on 31/12/16
The product of complete neutralization of H
3
PO
3
with NaOH
Answer
1
Sameer Alam
Subject: Science
, asked on 24/11/16
If in a bag the ratio of the no of moles of Hg to Cl is 1:2. Then, is it possible that the formation of Hg two chloride is more than Hg one chloride?
Answer
1
Maitri C Trivedi
Subject: Science
, asked on 22/11/16
explain bromination of ethyne.write all the steps involved
Answer
4
Thëjësh K
Subject: Science
, asked on 20/11/16
The formula of Butanoic acid is C
4
H
8
O
2.
Can it also be written as C
3
H
7
COOH ?
Answer
5
1
2
3
4
5
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What are you looking for?
(b)The refractive index of water with respect to vacuum is 4/3 and refractive index of vacuum with respect to glass is 2/3. If the speed of light in glass is 2 into 10 raised to 8 ms raised to -1, find the speed of light in (i)vacuum (ii)water
State the principle governing your answer.