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Why do seeds swell up and burst from their seed coat after soaking in water?

1 user answered

Harsh Mishra, Raipur
Level 5 contributor
This is because the water continues to diffuse in through the membranous cover of the raisins. The influx of water builds up an internal pressure that may reach the limit which the outer skin of raisins may no longer bear and causes the to burst out from their seed coat.

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Why does water in an earthen pot or Matka remain cool?

1 user answered

Harsh Mishra, Raipur
Level 5 contributor
A matka is made of mud and has many pores [extremely small holes] no matter how tightly you pack the mud, these pores remains. it is through these pores that the water placed inside the matka, oozes out. now to evaporate, the water needs to absorb heat which will change it to vapour. the only way the water oozing out of the matka can turn to vapour is by absorbing heat from the liquid within the matka and the matka itself. due this process continuous absorption of heat from the water inside the matka, in a few hours, water becomes cool.
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Why there are 366 days in every four years?

1 user answered

Harsh Mishra, Raipur
Level 5 contributor
There's a leap year every 4 year because Earth completes a revolution of the sun in 365 days and 6 hours. So over a period of 4 years. the additional 6 hours from every year would add up to form an entire day whip is called a leap day. This Leap day is added to the yearly calendar as 29th February every 4 years, making the 366 day 4th year a leap year.
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Why is it not possible to demonstrate respiration in green plants kept in sunlight?

1 user answered

Harsh Mishra, Raipur
Level 5 contributor
Because during day time in presence of sunlight plants are undergoing photosynthesis. during the process oxygen is evolving and the carbon dioxide is used by the plants. but during respiration oxygen is consumed by the plants so, it cannot be demonstrated
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What is a electric fuse?

1 user answered

Harsh Mishra, Raipur
Level 5 contributor
An electric fuse is a safety device which is used to limit the current in an electric circuit. the use of a fuse safeguards the circuit and the appliances connected in the circuit from being damage 
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How many posts are there in MPPSC 2017?

1 user answered

Abhishek Dewangan, Raipur
Level 9 contributor
The total numbers of the post in MPPSC 2017 are 198. The post wise details are

  • Deputy District Magistrate - 27 Posts
  • Deputy Police Superintendent - 45 Posts
  • Commissioner - 5 Posts
  • Block Development Officer - 1 Posts
  • Child Development Project Officer - 2 Posts
  • Area Coordinator - 2 Posts
  • Naib Tehsildar - 34 Posts
  • Chief Municipal Officer - 13 Posts
  • Assistant Jail Superintendent - 17 Posts
  • Commercial Tax Inspector - 23 Posts
  • Cooperative Inspector - 18 Posts
  • Deputy Registrar - 3 Posts.
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How does meningitis spread?

1 user answered

Puneet P, Raipur
Level 9 contributor
It can spread through the air when the infected person coughs, laugh, talks or sneezes. Sharing food, drinking glasses, eating utensils or towels could also transmit the infection.
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Are the questions that appear in IIT JEE and Class XII board exams similar to each other?

1 user answered

Vipul Tiwari, Raipur
Level 9 contributor
The nature of the questions asked in both exams is different from each other even though they are being asked from the same syllabus. While board exams would have straightforward questions and answers, IIT JEEE questions would be tougher in comparison and question would be like a riddle in chich the student would have to apply the core concept as well as logic. While a board exam paper would mostly just judge the ability to memorise and the academic ability of the student, IIT JEE also tests the analytical ability, alertness and approach to solving the problem.
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How does tooth decay start?

1 user answered

Shweta Kalgi, Bangalore
Level 8 contributor
The tiny food particles that get stuck on your teeth can turn into acid because of bacteria which would then eat away at the enamel, dentine and then eventually the pulp causing tooth decay and a very painful toothache.
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What are some tips to prevent the decay of tooth?

1 user answered

Shweta Kalgi, Bangalore
Level 8 contributor
  • Make sure to eat food with vitamins and minerals
  • Don't eat sweet food between meals
  • Bush your teeth twice a day in the morning and at night before you go to bed.
  • Go for a dental checkup at least once in 6 months.
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