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Ask QuestionPosted by Kamal Khakhodiya 4 years, 7 months ago
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Posted by Ujjwal Kant 4 years, 7 months ago
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Posted by Ujjwal Kant 4 years, 7 months ago
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Meghna Thapar 4 years, 6 months ago
The weight of an object on the moon will be about one-sixth of what is on the earth. Thus, a spring balance which shows the weight of a body to be 6 N on earth will show a weight of only 1 N when taken to the moon. The weight of an object on the moon is less than that on the earth because the mass and radius of the moon are less than that of earth.
Suppose we have an object of mass m. let its weight on the moon be Wm, the mass of the moon is Mm and its radius is Rm. now, according to the universal law of gravitation, the weight of the object on the moon will be:
Wm = G x Mm x m/Rm2
Let the weight of the same object on the earth be We. The mass of the earth is M and its radius is R.
We = G x M x m/R2
Wm = G x 7.36 x 1022 kg x m / (1.74 x 106 m)2
Wm = 2.431 x 1010 G x m i.
We = 1.474 x 1011 G x m ii.
Dividing both the equations i. & ii.
Wm/We = 1/6
Weight of the object on the moon / Weight of the object on the earth = 1/6
Weight of the object on the moon = (1/6) × its weight on the earth.
Posted by Alok Kumar Kumar 4 years, 7 months ago
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Kushangi ..... 4 years, 7 months ago
Sandeep Muduli 4 years, 7 months ago
Posted by Chhaya Gangwar 4 years, 7 months ago
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Meghna Thapar 4 years, 6 months ago
Johannes Kepler was a 16th century astronomer who established three laws which govern the motion of planets around the Sun, known as Kepler’s laws of planetary motion. These are:
- Kepler's First Law states that the planets move around the Sun in elliptical orbits, with the Sun at one of the two foci of the elliptical orbit.
- Kepler's Second Law states that in an elliptical orbit of the planet, the line joining the centre of the planet to the centre of the Sun sweeps out equal areas in equal intervals of time.
- Kepler’s Third Law states that the cube of the mean distance ‘r’ of a planet from the Sun is directly proportional to the square of its orbital period 'T'.
Posted by Arun Kumar 4 years, 7 months ago
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Posted by Ganesh G 4 years, 7 months ago
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Posted by Nitish Yadav 4 years, 7 months ago
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Deepak Pal 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
Humans have as much as 300 bones at birth. However, the bones start to fuse with age. At adulthood, the total number of bones is reduced to 206.
Gundubogula Srujana 4 years, 7 months ago
Posted by Nitish Yadav 4 years, 7 months ago
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Pappuyadav Pappu 4 years, 7 months ago
Deepak Pal 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
There are seven colors in the rainbow: red, orange, yellow, green, blue, indigo and violet.
Posted by Akshat Swami 4 years, 7 months ago
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Posted by Sarang Kulkarni 4 years, 7 months ago
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Seema Chandel 4 years, 7 months ago
Avinash Avinash 4 years, 7 months ago
Posted by Pappuyadav Pappu 4 years, 7 months ago
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Posted by Gokul Halder 4 years, 7 months ago
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Posted by Rushikesh Patil 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
The cells are called as structural and functional units of a living body. Cells are structural unit as they form the structure of the organism. Cells combine to form tissues, which further combine to form organs, organs combine to form organic systems, which further combine to form organism. So, cell is the basic structural unit for all unicellular and multicellular organisms.
Some of the basic life processes or functions takes place in every cell to keep the organisms alive such as digestion, respiration, excretion, etc., whether it is a single-celled organism or multicellular organism. So, the cells are also called the functional unit of life owing to these processes.
Posted by Amarjit Jena 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Antibiotics are antimicrobial drugs obtained from other organisms (such as moulds, fungus and some soil bacteria) to combat harmful microorganisms. However, they are not very useful against certain microbes such as viruses.
Antibiotics are produced on a large scale by the fermentation process. This is a chemical process which is induced by the microorganisms in a large tank. A large tank contains the growth medium that provides the nutrition for the microorganism’s growth. Optimization of temperature, pH levels, oxygen and nutrient parameter in the fermentation tank is very crucial to producing antibiotics. After the completion of antibiotics production, they are extracted and purified through multiple physical processes. Finally, the purified antibiotics are converted into crystal form.
Posted by Mugil Mugil 4 years, 7 months ago
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Gaurav Seth 4 years, 7 months ago
It is a well defined circular path around the nucleus in which an electron revolves.
It represents the two-dimensional motion of the electron around the nucleus.
Vedansh Tomar 4 years, 7 months ago
Posted by Pappuyadav Pappu 4 years, 7 months ago
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Jeslin Anna Jacob? 4 years, 7 months ago
Ankit Gupta 4 years, 7 months ago
Harshita Walia 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
Acetone, petrol, perfume etc., being volatile, evaporate very fast when exposed to larger surfaces. When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surface of the palm to compensate for the loss of energy, making the surroundings cool. Hence, our palm feels cold when we put some acetone or petrol or perfume on it.
Posted by Kailash Kumar 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Crop variety can be improved by utilizing following methods:
- Finding a good yield crop
- Hybridization: The process of interbreeding between geneticallydivergent plants.
- Introducing a gene to genetically modify the crops by providing desired characteristics to the crops.
- Good quality seeds must be provided to the farmers.
- Taking care to prevent the biotic factors(diseases, insects and nematodes) andabiotic factors (drought, salinity, waterlogging, heat, cold and frost) that can affect the crop growth.
- Shorter maturity of the crops results in more economical variety.
- Attempts must be taken to ensure higher yield.
Posted by Harshit Singh 4 years, 7 months ago
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Posted by Ayush Dubey 4 years, 7 months ago
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Gaurav Seth 4 years, 7 months ago
The to and fro motion of a body along the same path about its mean position is called oscillation
Posted by Prasad Hk 4 years, 7 months ago
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Avinash Avinash 4 years, 7 months ago
Posted by Tanu Gurjar 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Lichens are called as dual organisms because they have symbiotic relationship between algae and fungus.
Explanation:
• Lichens are species that grown from the substrate of fungi in an algae environment
• The algae and the fungi are in mutual relationship the algae help them to produce food and the fungus help them to absorb the nutrients
• Symbiotic relationship is that the organisms have mutual support and they help each other and they are beneficiary to each other
• They are of various size and forms and they are divided into thallus and the filament body parts
• Lichens are of variety of colors and this is due to the presence of usnic acid
Posted by Rita Devi 4 years, 7 months ago
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Avinash Avinash 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
| Homogeneous mixture | Heterogeneous mixture |
| It has a uniform composition | It has a non-uniform composition |
| It has only one phase | There are two or more phases |
| It can’t be separated out physically | It can be separated out physically |
| ‘homo’ means the same | ‘hetero’ means different |
| Example: a mixture of alcohol and water | Example: a mixture of sodium chloride and sand |
Posted by Arman Khan 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
A mixture of sulphur and carbon disulphide is a heterogeneous mixture and shows tyndall effect.
Reason:
In collodial solution, the size of particles are big enough to scatter the light which is known as Tyndall effect .
Posted by Rahul Kumar 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
Greenhouse effect is the process by which radiations from the sun are absorbed by the greenhouse gases and not reflected back into space. This insulates the surface of the earth and prevents it from freezing.
Posted by Pappuyadav Pappu 4 years, 7 months ago
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Posted by Pappuyadav Pappu 4 years, 7 months ago
- 1 answers
Jeslin Anna Jacob? 4 years, 7 months ago
Posted by Pappuyadav Pappu 4 years, 7 months ago
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Avinash Avinash 4 years, 7 months ago
Yogita Ingle 4 years, 7 months ago
The cooling in a desert cooler is caused by the evaporation of water. A desert cooler cools better on a hot and dry day because the higher temperature on a hot day increases the rate of evaporation of water and the dryness of air (low humidity of air) also increases the rate of evaporation of water. And due to increased rate of evaporation of water, a desert cooler cools better on a hot and dry day.
Posted by Pappuyadav Pappu 4 years, 7 months ago
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Yogita Ingle 4 years, 7 months ago
A mixture of two miscible liquids can be separated by the process of fractional distillation. The separation of two liquids by fractional distillation depends on the difference in their boiling points. Fractional distillation is carried out by using a fractionating column.
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Pankaj Goswami 4 years, 7 months ago
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