you never get back a sped arrow ,a lost opportunity and a spoken word .
write a composition on following
The equation of two interferencing waves are y1 = bcos(wt) & y2 = bcos(wt+phi) respectively . Destructive interference will take place at the point of observation for the following values of phi
scenes. Name of the characters should be written on a different pages.
A) n0/𝜀0, left B) n0/𝜀0, right C) 2n0/𝜀0, left D) 2n0/𝜀0, right
A)lily family
B)brinjal family
C)China rose family
D)mustard family
ans; a chemical change can be confirmed by the following;
1) change in temperature
eg; calcium oxide reacts vigorously with water to produce calcium hydroxide along with evolution of large amount of heat.
2) evolution of gas
eg; Zn reacts with H2so4 to form ZnSO4 and H2
PLS SEE THIS WHETHER THIS ANSWER IS CORRECT OR NOT. EXPERT ANS PLS
you never get back a sped arrow ,a lost opportunity and a spoken word .
write a composition on following
The equation of two interferencing waves are y1 = bcos(wt) & y2 = bcos(wt+phi) respectively . Destructive interference will take place at the point of observation for the following values of phi
A) 1/4 B) 4 C) 2 D) 1/2
a) Collect 4 wrappers each of frozen, canned and fried food items. b) Find the preservatives present in these food items. c) List the various preservatives and methods of their preservation. d) What are the chemicals used in preservatives? e) List 3 harmful food preservatives and its side effects f) List 3 natural preservatives
Q. Write a letter to the principal of your school requesting him to get your classroom repaired as it has been in a bad condition for some time now. You are Anil of ABC Public School, Uttam Nagar, New Delhi-59.
Answer:
Examination Hall
New Delhi-110062
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Nov 25, 20xx
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The Principal
ABC Public School
Uttam Nagar
New Delhi-110059
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Dear sir,
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Subject: Need of urgent repair of the classroom assigned to VIII-C
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With due respect, I would like to draw your kind attention towards the poor condition of our classroom that is room no. 15 on the first floor of the school building.
Our classroom is in need of urgent repair. There is dampness in the walls and the roof. It not only smells bad but the plaster has also started coming off the walls. This may pose health hazards in the approaching winter. Moreover, students cannot concentrate on their lessons with uncomfortable surroundings.
As it is becoming increasingly difficult for us to continue studying in the classroom, I request you to arrange for our classroom to get repaired at the earliest. Meanwhile, please assign another classroom to us.
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Yours sincerely,
Anil
Class VIII-C
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Is this format of writting letter is correct or wrong