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P Priyanka Kumari
Three groups of plants that bear archegonia are given below: Bryophytes Pteridophytes Gymnosperms. The life cycle of a pteridophyte, then it consists of two morphologically distinct phases: (i) The gametophytic phase (ii) The sporophytic phase. These two phases come one after another in the life cycle of a pteridophyte and this phenomenon is called alternation of generation. The gametophyte...

The difference in mass makes the pull of earth stronger so it rortates around earth.It does not move closer because its in equilibrium,its roations and revolution counteract the pull of the earth.It remains so because its angular moomentum is conserved.


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A Amit Singh
the shape of the following things are (a) Your instrument box- Cuboid (b) A brick- Cuboid (c) A matchbox-Cuboid (d) A road-roller- Cylinder (e) A sweet laddu-Sphere

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A Ajeet Singh

1:-  0.5

2:-  2.5

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R Ravindra Pindel
The additive inverse of   The additive inverse of  The additive inverse of  

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S Shilpa Suresh


  1. Go to the official website of Jawaharlal Navodaya Vidyalaya.
  2. Click on the Admission link.
  3. Click on the class 6th Admit Card link.
  4. Enter the "login credentials" & download the admit card.

 I hope this can help you out.........

Mention the school and board of admission

A binary number uses only two digits zero and one. In a binary system, numbers are represented as follows

0 00
1 01
2 10
3 11
4 100
5 101
6 110
7 111


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National Institute of Open Schooling (NIOS). View details on NIOS official website

Ever observed an old glass window? It will be thicker at the base than the top.                        This shows that glass flows(at a very slow rate) and it can flow because it is amorphous.


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R Ravindra Pindel

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D Devendra Khairwa
Gravitational force at the midpoint will be zero. This is because both spheres are identical and their forces will be equal but opposite in direction. The gravitational potential is given by :                                                                                                                                                       or                                                   ...

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D Devendra Khairwa
Total energy = kinetic energy (KE) + potential energy(PE) KE > 0 since m and v2 is positive. If KE <0 particles cannot be find. If PE>TE, then KE<0 (now in all graph check for this condition) In case 1 kinetic energy is negative for x<a. So at x<a particle cannot be found. In case 2 for x<a and for x> b kinetic energy is negative. So the particle cannot be found in these regions. In the...
It cannot be said from the above-given graph whether the particle is moving along a straight line or along a parabolic path as the x-t graph does not tell us about the trajectory taken by the particle. From the given graph we can only say that the position of the particle along the x-axis does not change till time t=0 and after that it starts increasing in non-linear manner.

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R Rajeev Yadav

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