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Ask QuestionPosted by Femi Binod 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
When the motion of the body is opposite to the direction of acceleration we say the acceleration is negative and when the motion of the body is in same direction as that of acceleration we say the acceleration is positive.
Posted by Vani Tiwari 4 years, 3 months ago
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Rajat Singh 4 years, 3 months ago
Gaurav Seth 4 years, 3 months ago
A force where two forces acting in opposing directions on a body, are not equal in magnitude and in size, is known as an unbalanced force. In an unbalanced force, a body changes its position i.e. we can observe a moving object changing its direction, either increasing the speed or decreasing the speed and a body at rest starts to move and vice versa.
Posted by Tani Sha 4 years, 3 months ago
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Posted by Vani Tiwari 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
When the velocity decreases with respect to time it is termed as retardation or deceleration
In reality negative acceleration is commonly called retardation Its SI unit is m/s2
Posted by Vani Tiwari 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
- Velocity: Velocity is the speed of an object moving in a definite direction.
- The SI unit of velocity is also metre per second.
- Velocity is a vector quantity; it has both magnitude and direction.
Posted by Vani Tiwari 4 years, 3 months ago
- 1 answers
Yogita Ingle 4 years, 3 months ago
- Speed: Distance travelled by the object in unit time.
- The SI unit of speed is metre per second. This is represented by the symbol m s–1 or m/s.
- Speed is a scalar quantity; it only has direction.
Posted by Divya Gupta 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
The sound waves are called mechanical waves because they need a material medium( like solid, liquid or gas ) for their propagation. The sound wave involve the vibrations of the particles of the medium through which they travel .
Mrudula Peddireddy 4 years, 3 months ago
Posted by Shallu Mehta 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
A solution is a homogeneous mixture of two or more substances. A solution has a solvent and a solute as its components. The component of the solution that dissolves the other component in it (usually the component present in larger amount) is called the solvent. The component of the solution that is dissolved in the solvent (usually present in lesser quantity) is called the solute.
Posted by Suhana Mahayich 4 years, 3 months ago
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Rajat Singh 4 years, 3 months ago
Posted by Astika Gurjar 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
Cations are positively charged ions. They are formed when a metal loses its electrons. They lose one or more than one electron and do not lose any protons. Therefore they possess a net positive charge. Some examples of cations are Calcium (Ca2+), Potassium (K+), hydrogen (H+).
Posted by S.A. Wadood 4 years, 2 months ago
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Posted by Rajkunwar Dodiya 4 years, 3 months ago
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Insha Fatima 4 years, 3 months ago
Yogita Ingle 4 years, 3 months ago
The basic structure of cell consist of nucleus, plasma membrane and cytoplasm. Other than this different structures like Endoplasmic Reticulum(ER), Golgi body, Lysosomes, Mitochondria, Plastids and Vacuoles are also present. All of these are cell organelles. Presence of different cell organelles differ from organism to organism i.e. unicellular or multicellular organism. Cell organelle can be either membrane bound or can lack membrane.
Posted by Ranjan Mishra 4 years, 3 months ago
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Posted by Akshat Dadhich 4 years, 3 months ago
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Shrishti Mehta 4 years, 3 months ago
Yogita Ingle 4 years, 3 months ago
The physical quantity that has both direction as well as magnitude.
Force is vector quantity because its has direction as well as magnitude.
Posted by Akshat Dadhich 4 years, 3 months ago
- 3 answers
Yogita Ingle 4 years, 3 months ago
The physical quantity that has both direction as well as magnitude.
Vector quantity examples are many, some of them are given below:
- Linear momentum
- Acceleration
- Displacement
- Momentum
- Angular velocity
- Force
- Electric field
- Polarization
S.A. Wadood 4 years, 3 months ago
Posted by Sadhna Singh 4 years, 3 months ago
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R Atharv 4 years, 3 months ago
Posted by Sukhdev Singh 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
- A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions.
- For Example: - Soap solution, Milk, Ink, Blood and solutions of synthetic detergents.
R Atharv 4 years, 3 months ago
Posted by Krishna Dwivedi 4 years, 3 months ago
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Posted by Rajat Singh 4 years, 3 months ago
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Rated Vlogs 4 years, 3 months ago
R Atharv 4 years, 3 months ago
Posted by Bliss Jeimioo 4 years, 3 months ago
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Posted by Manoj Kumar 4 years, 3 months ago
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Posted by Arjun Vishwakarma 4 years, 3 months ago
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Insha Fatima 4 years, 3 months ago
Manoj Kumar 4 years, 3 months ago
Adarsh Gupta 4 years, 3 months ago
Posted by Divyansh Bhawsar 4 years, 3 months ago
- 2 answers
Yogita Ingle 4 years, 3 months ago
The commercial unit of electrical energy is a kilowatt-hour (kWh).
To convert 1kWh into joule
1kWh = 1000 × 60 × 60
1kWh = 3.6 × 106 J
The electric energy used in factories, industries and houses which are measured in kWh.
Posted by Areej J 4 years, 3 months ago
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Manoj Kumar 4 years, 3 months ago
Rajat Singh 4 years, 3 months ago
Posted by Jiwan Gajmer 4 years, 3 months ago
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Gaurav Seth 4 years, 3 months ago
Ammonium chloride changes directly from solid gaseous on heating . So to separate mixtures containing a sublimable volatile component from a non-sublimable impurity i.e., sodium chloride, the sublimation process is used.
• Place the china dish over a wire gauze placed over a tripod stand.
• Cover the china dish with an inverted glass funnel and plug in a little cotton at the opening stem.
• On heating the mixture, white fumes evolve.
• Stop heating when the fumes stop rising and allow the funnel to cool.
• On cooling, remove the funnel and transfer the solid ammonium chloride sticking on the walls of funnel to a watch glass.
Posted by Nandini Sharma 4 years, 3 months ago
- 4 answers
Yogita Ingle 4 years, 3 months ago
Mitochondria are round "tube-like" organelles that provide energy to a cell in the form of ATP (Adenosine Triphosphate) for performing different chemical activities for the sustainance of life.
The mitochondria is also called powerhouse of the cell.
Posted by Jeevitha R 4 years, 3 months ago
- 2 answers
Gaurav Seth 4 years, 3 months ago
Consider the velocity-time graph of an object that moves under uniform acceleration as shown in the figure 
From this graph, we can see that initial velocity of the object (at point A) is u and then it increases to v (at point B) in time t. The velocity changes at a uniform rate a. As shown in the figure, the lines BC and BE are drawn from point B on the time and the velocity axes respectively, so that the initial velocity is represented by OA, the final velocity is represented by BC and the time interval t is represented by OC. BD = BC - CD, represents the change in velocity in time interval t.
Posted by Ishwar Vats 4 years, 3 months ago
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Meghna Thapar 4 years, 2 months ago
Atoms having the same atomic mass and different atomic numbers are known as isobars. Ce and Se are isobars having the same atomic mass 76. They have different atomic numbers, i.e., Ce has an atomic number of 32 and Se has an atomic number of 34. Isobars are the atoms of different elements having same atomic mass but a different atomic number. They have the same number of nucleons (protons + neutrons).
Posted by Christina Parage 4 years, 3 months ago
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Posted by Ajitkumarupadhaya Upadhaya 4 years, 3 months ago
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