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Ask QuestionPosted by Shruti Maheshwari 6 years, 5 months ago
- 2 answers
Yogita Ingle 6 years, 5 months ago
To concert Kelvin scale into Celsius scale we have to subtract 273 so
300K = 300-273 = 27ºC,
Posted by Rohan Banga 6 years, 5 months ago
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Hariom Dalal 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
The cooling in a desert room cooler is due to the process of evaporation.Desert cooler cools better on a hot dry day because the temperature of the atmosphere increases the rate of evaporation also increases and in hot day the humidity in atmosphere is less.If humidity is less evaporation is more.This gives better cooling effect.
Posted by Pawan Kumar 6 years, 5 months ago
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Posted by SミT Tyagi 6 years, 5 months ago
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Posted by Anu Kurien 6 years, 5 months ago
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Hariom Dalal 6 years, 5 months ago
Posted by Sourasmita Saha 6 years, 5 months ago
- 1 answers
Sia ? 6 years, 5 months ago
It is observed that heat is required for change of state, although the temperature remains constant throughout the change of state.If mass m of a substance undergoes a change from one state
to the other, then the quantity of heat required is given by Q = mL or L = {tex}\frac{Q}{m}{/tex}
Here, L is known as latent heat and is defined as the amount of heat required/released for complete conversion of unit mass of substance from one state to another.
SI unit of latent heat is J/kg.
Latent heat is of three types. Latent heat for a solid-liquid state change is called the "latent heat of fusion". Latent heat for a liquid-gas state change is called the "latent heat of vaporisation" and that for a solid-gas state change is called the "latent heat of sublimation".
Posted by Vimal Singh 6 years, 5 months ago
- 1 answers
Payal Ahlawat 6 years, 5 months ago
Posted by Suyog Redekar 6 years, 5 months ago
- 0 answers
Posted by Tina Tina 6 years, 5 months ago
- 1 answers
Sia ? 6 years, 5 months ago
Bacteria and microorganisms were first observed by Anton van Leeuwenhoek in 1676 using a single-lens microscope made by himself. He is known as the Father of Microbiology and thus is known as the first microbiologist.
Posted by Rohit Sharma 6 years, 5 months ago
- 2 answers
Posted by Hamid Lone 6 years, 5 months ago
- 1 answers
Sia ? 6 years, 5 months ago
This happens because the vapour pressure of some substances is higher when in the solid form than the liquid form. Sublimation is an endothermic phase transition that occurs at temperatures and pressures below a substance's triple point in its phase diagram.
Posted by Smitha Abhinay 6 years, 5 months ago
- 3 answers
Hariom Dalal 6 years, 5 months ago
Posted by Vaishnavi Chaturvedi 6 years, 5 months ago
- 4 answers
Yogita Ingle 6 years, 5 months ago
A hectare is a unit of area equal to 10,000 square meters. Usually used to measure land.
Example: a square that is 100 meters on each side has an area of 1 hectare.
Symbol: ha
1 ha = 2.47 Acres approximately.
Posted by Arzoo Aftab 6 years, 5 months ago
- 1 answers
Sia ? 6 years, 5 months ago
Independent units are known as fundamental units. There are 7 fundamental quantities. The units of seven fundamental quantities are given below:
| S.No. | Physical Quantity | SI unit |
| 1. | Length (l) | Metre (m) |
| 2. | Mass (m) | Kilogram (kg) |
| 3. | Time (t) | Second (s) |
| 4. | Electric Current (I) | Ampere (A) |
| 5. | Thermodynamic Temperature (T) | Kelvin (K) |
| 6. | Amount of substance (n) | Mole (mol) |
| 7. | Luminous Intensity (I) | Candela (Cd) |
Posted by Aditya Raj 6 years, 5 months ago
- 1 answers
Deepshikha Mishra 6 years, 5 months ago
Posted by Jatin Sarot 6 years, 5 months ago
- 1 answers
Posted by Jatin Sarot 6 years, 5 months ago
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Sarika Maggo 6 years, 5 months ago
Posted by Sarthak Singh 6 years, 5 months ago
- 1 answers
Gaurav Seth 6 years, 5 months ago
The factors affecting the rate of evaporation are :
Temperature : If the temperature of the liquid increases then the rate of evaporation also increases.
Surface area : The rate of evaporation increases with the increasing of the surface area
Humidity : The amount of water vapour present in the air is called humidity . If the humidity increases then the rate of evaporation decreases.
Wind speed: Evaporation increases with an increase in wind speed.
Posted by Surender Kashwan 6 years, 5 months ago
- 1 answers
Gaurav Seth 6 years, 5 months ago
Velocity-Time Relation
- A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v.
- Now we need to find the relation between v,u,a,t graphically.
Position-Time Relation
- A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v.
- In the time interval of time t , it covers a distance of s.
- Now we need to derive relation between s,u,a,t graphically.
Position–Velocity Relation
- A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v.
- In the time interval of time t , it covers a distance of s.
- Now we need to find relation between s,u,v,a graphically.
Posted by Akshayakumar Pradhan 6 years, 5 months ago
- 1 answers
Posted by Nikita Queen 6 years, 5 months ago
- 9 answers
Advaitha Sajeev 6 years, 5 months ago
Deepshikha Mishra 6 years, 5 months ago
45516111? 46 6 years, 5 months ago
Kashika Khuranaa.. ? 6 years, 5 months ago
Posted by Nikita Queen 6 years, 5 months ago
- 4 answers
Syed Mohammad Hashmi Qadri 6 years, 5 months ago
Shweta Mulchandani 6 years, 5 months ago
Pramod Pant 6 years, 5 months ago
Posted by Dev Shishodia 6 years, 5 months ago
- 1 answers
Nithya Vijay 6 years, 5 months ago
| Chapter 1 | chapter 2 |
| States of matter and its conversion | types of matter and Substances formed from it |
| 7 basic units | study only about mass and volume percentage |
| Facts about temperature | facts about mass, separation of components |
Posted by Ummat Rasul Ansari 6 years, 5 months ago
- 4 answers
Deepshikha Mishra 6 years, 5 months ago
Posted by Jitesh Kumar 6 years, 5 months ago
- 4 answers
Sachin Srivastav 6 years, 5 months ago
Posted by Gurleen Kaur 6 years, 5 months ago
- 1 answers
Yogita Ingle 6 years, 5 months ago
| Miscible liquids | Immiscible liquids |
| 1. Liquids which mix together in all proportions and form a single layer are called miscible liquids. | 1. Liquids which do not mix with each other and form separate layers are called immiscible liquids. |
| 2. They are separated by the process of fractional distillation. | 2. They are separated by using separating funnel. |
Posted by Sp Balasaheb 6 years, 5 months ago
- 1 answers
Posted by Reena Gungun 6 years, 5 months ago
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Posted by 🧊🧊Komal Pal🧊🧊 6 years, 5 months ago
- 4 answers
Yogita Ingle 6 years, 5 months ago
No , as we look around, we can see that most of the matter around us exist as mixtures of two or more pure components, for example, sea water, minerals, soil are all mixtures. Mixtures are of two kinds- Heterogeneous and Homogeneous.
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Suby Mahajan 6 years, 5 months ago
1Thank You