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Ask QuestionPosted by Yash Joshi 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Momentum is defined as the quantity of motion of the body. It is measured by mass×velocity, as momentum depends upon velocity, and it depends on the direction of the motion of the body as well. Momentum is a vector quantity since velocity is vector while mass is scalar.
Momentum = Mass X Velocity
p = mv
Unit of momentum is given as:
| SI unit | kg.m.s-1 |
Mehak Rai 4 years, 11 months ago
Posted by Ayush Kumar Chourasia 4 years, 11 months ago
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Posted by Kishlay Chaudhary 4 years, 11 months ago
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Bharat Sharma 4 years, 11 months ago
Posted by Prajwal G N 4 years, 11 months ago
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Ananya K 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
Lysosomes
The sac-like structures in a cell surrounded by membrane are called lysosomes.
They keep the cells clean by digesting and breaking the outside materials like bacteria, food entering the cell or worn-out cell organelles into small pieces.
They can digest these organic materials due to the presence of strong digestive enzymes that can brreak down organic compounds. Therefore, lysosome is also known as a suicide sac.
Many scientists believe that lysosomes are not present in plant cells and their function of lysosomes in plants is performed by vacuole.
Udita Singh 4 years, 11 months ago
Posted by ꧁╾━╤デ╦︻ ℛ??????࿐ 4 years, 11 months ago
- 2 answers
Yogita Ingle 4 years, 11 months ago
Group 18 of the modern periodic table consists of noble gases. Helium, neon, argon, krypton, xenon, and radon are noble gases. These gases are monoatomic and chemically inert under normal conditions and hence are also named as inert gases.
Ashutosh Singh 4 years, 11 months ago
Posted by Acbu Roy 4 years, 11 months ago
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꧁╾━╤デ╦︻ ℛ??????࿐ 4 years, 11 months ago
Posted by Palak Pandey 4 years, 11 months ago
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Meghna Thapar 4 years, 11 months ago
The valency of aluminium is 3 instead of 5 because the energy required to remove 3 electrons from the outermost shell is less than the energy required to add 5 electrons. Because aluminum has three, that means three fluorines can bond. The make the formula AlF3, also known as aluminum trifluoride. Each of the fluorine atoms gets an electron to fill their shell, and the aluminum loses three, giving it a filled shell too (remember, aluminum has three extra electrons).
Posted by Sazain Fayaz 4 years, 11 months ago
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Anubhab Shivam 4 years, 11 months ago
Ananya K 4 years, 11 months ago
Posted by Lakshya Gupta 4 years, 11 months ago
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Bharat Sharma 4 years, 11 months ago
Udita Singh 4 years, 11 months ago
Posted by Arshpreet Singh 4 years, 11 months ago
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Ananya K 4 years, 11 months ago
Ashirwad Chauhan 4 years, 11 months ago
Posted by Simran Kaur 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Given parameters
Initial velocity of the ball (u) = 49m/s.
The velocity of the ball at maximum height (v) = 0.
g = 9.8m/s2
Let us considered the time taken is t to reach the maximum height H.
Consider a formula,
2gH = v2 – u2
2 × (- 9.8) × H = 0 – (49)2
– 19.6 H = – 2401
H = 122.5 m
Now consider a formula,
v = u + g × t
0 = 49 + (- 9.8) × t
– 49 = – 9.8t
t = 5 sec
(1) The maximum height to ball rises = 122.5 m
(2) The total time ball takes to return to the surface of the earth = 5 + 5 = 10 sec.
Posted by Pranav Susar 4 years, 11 months ago
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Posted by Roshani Pal 4 years, 11 months ago
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Roshani Pal 4 years, 11 months ago
Posted by Krish Gandhi 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Momentum is defined as the quantity of motion of the body. It is measured by mass×velocity, as momentum depends upon velocity, and it depends on the direction of the motion of the body as well. Momentum is a vector quantity since velocity is vector while mass is scalar.
Momentum = Mass X Velocity
p = mv
Posted by Pranitha R 4 years, 11 months ago
- 3 answers
Yogita Ingle 4 years, 11 months ago
Vaporization can be defined as the process in which liquid state changes into the vapour state. As a result of an increase in temperature, the kinetic energy of the molecules increases. Due to the increases in kinetic energy, the force of attraction between the molecules reduces. As a result, they escape into the surrounding in the form of vapours. This process involves the consumption of heat energy.
Examples of Vaporization in Our Daily Life
- Industrially, salt is recovered from sea-water by the process of vaporization.
- Wet clothes are dried up due to the process of vaporization.
Krish Gandhi 4 years, 11 months ago
Krish Gandhi 4 years, 11 months ago
Posted by Bhawna Jain 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
s=ut+1/2at2
40=1/2a(5)2
a=80/25
a=3.2m/s2
f=ma
=1200*3.2
f=3840N
work=fs
=3840*40
w=153600J
Posted by Acbu Roy 4 years, 11 months ago
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Meghna Thapar 4 years, 11 months ago
A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids can also be called semimetals. On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids. The term metalloids has been used to arbitrarily classify those elements whose properties are considered to be intermediate between those of obvious metals and obvious non-metals.
Elements: Silicon; Boron; Arsenic; Antimony
Posted by Udita Singh 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Distillation is used for separating a mixture of miscible liquids into its components, when both the components are miscible with each other and the difference in the boiling points of the liquid components is more than 20-25 degree celsius.
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Manalisha Majhi 4 years, 11 months ago
Posted by ꧁╾━╤デ╦︻ ℛ??????࿐ 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
A cathode-ray tube (CRT) is a vacuum tube in which an electron beam, deflected by applied electric or magnetic fields, produces a trace on a fluorescent screen. The function of the cathode ray tube is to convert an electrical signal into a visual display.
Posted by Rooh Choudhary 4 years, 11 months ago
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Posted by Tarab Mansoori 4 years, 11 months ago
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Posted by Bhumika Jaiswal 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Crystallization can be defined as the process through which the atoms/molecules of a substance arrange themselves in a well-defined three-dimensional lattice and, consequently, minimize the overall energy of the system.
Crystallization Process
- The solution is heated in an open container
- The solvent molecules start evaporating, leaving behind the solutes
- When the solution cools, crystals of solute start accumulating on the surface of the solution
- Crystals are collected and dried as per the product requirement
- The undissolved solids in the liquid are separated by the process of filtration
- The size of crystals formed during this process depends on the cooling rate.
- A large number of tiny crystals are formed if the solution is cooled at a fast rate
- Large crystals are formed at slow cooling rates
Posted by Bhumika Jaiswal 4 years, 11 months ago
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Acbu Roy 4 years, 11 months ago
Nandini Sharma 4 years, 11 months ago
Yogita Ingle 4 years, 11 months ago
Gravitation is the force of attraction between two objects in the universe. Gravitation may be the attraction of objects by the earth. This force is proportional to the product of masses of the objects and inversely proportional to the square of the distance between them. It is independent of the medium.
Posted by Samrudh S Naik 4 years, 11 months ago
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Yogita Ingle 4 years, 11 months ago
Chromatography is the technique used for separation of those solutes that dissolve in the same solvent.
To understand how this technique can be used let us perform an activity.
Take a thin strip of filter paper. Draw a line on it using a pencil, approximately 3 cm above the lower edge as shown in figure(a). Put a small drop of ink (water soluble, that is, from a sketch pen or fountain pen) at the centre of the line. Let it dry. Lower the filter paper into a jar/glass/ beaker/test tube containing water so that the drop of ink on the paper is just above the water level, as shown in Fig(b) and leave it undisturbed.
Watch carefully, as the water rises up on the filter paper. Now observe that the coloured component that is more soluble in water, rises faster and in this way colours get separated.
Posted by Ani Matcha 4 years, 11 months ago
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Udita Singh 4 years, 11 months ago
Posted by Dhruv Soni 4 years, 11 months ago
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Posted by Padmini Goswami 4 years, 11 months ago
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Tanu Prajapati 4 years, 11 months ago
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Ananya K 4 years, 11 months ago
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