Ask questions, doubts, problems and we will help you..
Ask questions which are clear, concise and easy to understand.
Ask Question
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Qmu . Official 5 years ago (10196829)
- 1 answers
Posted by Ajay Balaji M V 5 years ago (7308651)
- 1 answers
Posted by Vivek Negi 5 years ago (9224607)
- 1 answers
Krishan Pal 4 years, 10 months ago (4751723)
Posted by Dheeraj T 5 years ago (10002268)
- 3 answers
Posted by Dheeraj T 5 years ago (10002268)
- 1 answers
Posted by Diya Rajput 5 years ago (8907262)
- 3 answers
Posted by Mitali Chincholikar 5 years ago (10258896)
- 5 answers
Posted by Tanya Jain 5 years ago (10254417)
- 0 answers
Posted by Bishnu Priya Tripathy 5 years ago (10264373)
- 1 answers
Bishnu Priya Tripathy 5 years ago (10264373)
Posted by Dhairya Valecha 5 years ago (10264293)
- 4 answers
Dhairya Valecha 5 years ago (10264293)
Posted by Puspa Belung 5 years ago (10264288)
- 0 answers
Posted by Yug Patel 5 years ago (9667770)
- 1 answers
Yogita Ingle 5 years ago (2577571)
CCl4 molecule has zero dipole moment although the c-cl bond are polar this is because the shape of the molecule is tetrahedral and this make it very symmetrical and the four polar bond cancel out each other. so they have zero dipole moment.
Posted by Yug Patel 5 years ago (9667770)
- 2 answers
Vinay Verma 5 years ago (9174604)
Yogita Ingle 5 years ago (2577571)
Be has electronic configuration 1S2,2S2 and s orbital is completely filled and doesn't require any electron to complete its orbital.Hence, Be2 doesn't exist at all.
Posted by Yug Patel 5 years ago (9667770)
- 1 answers
Yogita Ingle 5 years ago (2577571)
According to Fajans rule....
The charge on the ion increases the covalent character also increases because.
a high charge containing cation can polarise the anion more easily
as in fecl3 the charge of fe is +3 and the charge of fe in FeCl2 is +2
the charge of fe in FeCl3 is more so fecl3 is more covalent
Posted by Yug Patel 5 years ago (9667770)
- 1 answers
Yogita Ingle 5 years ago (2577571)
The presence of -OH group helps in formation of hydrogen bonding. This helps in solubility of ethanol in water.
Posted by Ashmita Das 5 years ago (10150611)
- 1 answers
Yogita Ingle 5 years ago (2577571)
1. The major cause is due to the activities of humans like cutting down large numbers of trees, pollution, overhunting, etc.
2. It is also because of over population. As the population is increasing very rapidly, people cut the trees in the forests to build houses, factories, industries, etc. This leads to the destruction of the habitat of the species and that is why many of the species gets extinct.
3. Natural disasters like forest fire, volcano eruptions are also responsible for the extinction of species.
Posted by Princy Singh 5 years ago (9981926)
- 2 answers
Yogita Ingle 5 years ago (2577571)
an hour = 60 miutes
So, fraction of an hour is 40 minutes = 60/40 = 6/4 = 3/2
Posted by Diya Rajput 5 years ago (8907262)
- 1 answers
Yogita Ingle 5 years ago (2577571)
Let pencil be x and let pen be y
5x+7y=50
7x+5y=46
multiply first equation by 7
35x+49y = 350
multiply second equation by 5
35x+25y=230
solving them we get 24y=120 which gives y is 5 rupees
substituting in second equation we get x is 3 rupees
Posted by Ayush Hans 4 years, 11 months ago (10264091)
- 0 answers
Posted by Mukhtar Ray 5 years ago (10260095)
- 0 answers
Posted by Princy Singh 5 years ago (9981926)
- 4 answers
Yogita Ingle 5 years ago (2577571)
जिस शब्द के द्वारा किसी व्यक्ति, वस्तु, स्थान अथवा भाव के नाम का बोध हो, उसे संज्ञा कहते हैं; जैसे-आयुष, नेहा, गाजियाबाद, पुस्तक, बुढ़ापा, ईमानदारी, गरमी इत्यादि।
संज्ञा के तीन भेद होते हैं
- व्यक्तिवाचक
- जातिवाचक
- भाववाचक
Posted by Princy Singh 5 years ago (9981926)
- 2 answers
Yogita Ingle 5 years ago (2577571)
Fabrics are made from yarns, which in turn are made from fibers. Fibers are either natural or synthetic. Cotton, wool, silk and jute are some natural fibers, while nylon and polyester are some examples of synthetic fibers.
Posted by Tushar Aggarwal 5 years ago (9309422)
- 2 answers
Tanuj Pandey 5 years ago (3580053)
Posted by Harshdeep Kaur? 5 years ago (9240611)
- 2 answers
Posted by Ashish Kumar 5 years ago (10013696)
- 2 answers
Zeeshan Malik 5 years ago (10272435)
Posted by Kajal Bhatt 5 years ago (7149481)
- 1 answers
Yogita Ingle 5 years ago (2577571)
The baby thinks that the pebbles are real food and she even tries to put them into her mouth.
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Yogita Ingle 5 years ago (2577571)
Let us consider the randomly shaped body undergoing a rotational motion as shown in the figure below. The linear velocity of the particle is related to the angular velocity. While considering the rotational motion of a rigid body on a fixed axis, the extended body is considered as a system of particles moving in a circle lying on a plane that is perpendicular to the axis, such as the center of rotation lies on the axis.
In this figure, the particle P has been shown to rotate over a fixed axis passing through O. Here, the particle represents a circle on the axis. The radius of the circle is the perpendicular distance between point P and the axis. The angle indicates the angular displacement Δθ of the given particle at time Δt. The average angular velocity in the time Δt is Δθ/Δt. Since Δt tends to zero, the ratio Δθ/Δt reaches a limit which is known as the instantaneous angular velocity dθ/dt. The instantaneous angular velocity is denoted by ω.
From the knowledge of circular motion, we can say that the magnitude of the linear velocity of a particle traveling in a circle relates to the angular velocity of the particle ω by the relation υ/ω= r, where r denotes the radius. At any instant, the relation v/ r = ω applies to every particle that has a rigid body.
If the perpendicular distance of a particle from a fixed axis is ri, the linear velocity at a given instant v is given by the relation,
Vi = ωri
Similarly, we can write the expression for the linear velocity for n different particles comprising the system. From the expression, we can say that for particles lying on the axis, the tangential velocity is zero as the radius is zero. Also, the angular velocity ω is a vector quantity which is constant for all the particles comprising the motion.
0 Thank You