Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Manju Patidar 5 years ago
- 1 answers
Posted by Khushi Goyal 5 years ago
- 4 answers
Shreya Rao 5 years ago
Shreya Rao 5 years ago
Posted by Athmapriya P 5 years ago
- 1 answers
Posted by Teresa Zou 5 years ago
- 4 answers
Teresa Zou 5 years ago
Divya Thakur 5 years ago
Posted by Aadya Singh 5 years ago
- 2 answers
Aadya Singh 5 years ago
Aadya Singh 5 years ago
Posted by Aadya Singh 5 years ago
- 2 answers
Posted by Sajid Md 5 years ago
- 1 answers
Aadya Singh 5 years ago
Can't be applied in expression involving Trignometeic ratios n exponential terms..
Can't be applied in expression involving two or more terms separated by (+) Or (-).
Can't be applied in expression involving proportionality constant which has dimension...
Posted by Nancy Chhikara 5 years ago
- 5 answers
Ankit Singh Thakur???? 5 years ago
Gaurav Seth 5 years ago
A n s w e r :
F P S System In this system, the unit of length is foot, the unit of mass is pound and the unit of time is second.
Posted by Dark ..? 5 years ago
- 4 answers
Posted by Nancy Chhikara 5 years ago
- 5 answers
Dεερακ Ȿιηɠꜧ 5 years ago
In English it is "International system of units" the short form is taken from the french name
Gaurav Seth 5 years ago
S.I system (standard international system).
In this system the units of mass, length and time are same, as that of M.K.S system.
<article id="post-1294477">The full form of S.I is standard international system, it is an international system of units for the measurements. SI is a measuring system that is dependent on 7 base units:
Length in metre
Mass in kilogram
Time in second
Electric current in ampere
Temperature in kelvin
Amount of substance in mole
Luminous intensity in candela.
</article>Posted by Aadya Singh 5 years ago
- 1 answers
Gaurav Seth 5 years ago
calar Triple Product
If a, b, c are three vectors, then (a * b) * c is called scalar triple product and is denoted by [a b c].
∴ [a b c] = (a * b) * c
Geometrical Interpretation of Scalar Triple Product
The scalar triple product (a * b) * c represents the volume of a parallelepiped whose coterminous edges are represented by a, b and c which form a right handed system of vectors.
Expression of the scalar triple product (a * b) * c in terms of components
a = a1i + a1j + a1k, b = a2i + a2j + a2k, c = a3i + a3j + a3k is
<figure>
</figure>
Properties of Scalar Triple Products
1. The scalar triple product is independent of the positions of dot and cross i.e., (a * b) * c = a * (b * c).
2. The scalar triple product of three vectors is unaltered so long as the cyclic order of the vectors remains unchanged.
i.e., (a * b) * c = (b * c) * a= (c * a) * b
or
[a b c] = [b c a] = [c a b].
3. The scalar triple product changes in sign but not in magnitude, when the cyclic order is changed.
i.e., [a b c] = – [a c b] etc.
4. The scalar triple product vanishes, if any two of its vectors are equal.
i.e., [a a b] = 0, [a b a] = 0 and [b a a] = 0.
5. The scalar triple product vanishes, if any two of its vectors are parallel or collinear.
6. For any scalar x, [x a b c] = x [a b c]. Also, [x a yb zc] = xyz [a b c].
7. For any vectors a, b, c, d, [a + b c d] = [a c d] + [b c d]
8. [i j k] = 1
<figure>
</figure>
11. Three non-zero vectors a, b and c are coplanar, if and only if [a b c] = 0.
12. Four points A, B, C, D with position vectors a, b, c, d respectively are coplanar, if and only if [AB AC AD] = 0.
i.e., if and only if [b — a c— a d— a] = 0.
13. Volume of parallelepiped with three coterminous edges a, b,c is | [a b c] |.
14. Volume of prism on a triangular base with three coterminous edges a, b,c is 1 / 2 | [a b c] |.
15. Volume of a tetrahedron with three coterminous edges a, b,c is 1 / 6 | [a b c] |.
16. If a, b, c and d are position vectors of vertices of a tetrahedron, then
Volume = 1 / 6 [b — a c — a d — a].
Posted by Aadya Singh 5 years ago
- 1 answers
Gaurav Seth 5 years ago
Let S is the area of the bottom and h is the height of a parallelepiped, then the volume formula is,
V=S×h
Where,
S = Area of the bottom
h = Height
Example Find the volume of the parallelepiped, when 20cm2 is the area of the bottom and 10 cm is the height of the parallelepiped.
Solution:
Given,
Aare of the botton = S = 20cm2
Height = h = 10 cm
Volume formula is: V=S×h
V=20×10
V=200cm3
</article>Posted by Radhika Singh 5 years ago
- 2 answers
Posted by Radhika Singh 5 years ago
- 3 answers
Aseem Mahajan 5 years ago
</a> <a href="https://ibb.co/5Kf8kh6">
</a> <a href="https://ibb.co/LvvPP4h">
</a>
Posted by Radhika Singh 5 years ago
- 4 answers
Aseem Mahajan 5 years ago
</a> <a href="https://ibb.co/5Kf8kh6"></a> <a href="https://ibb.co/LvvPP4h"></a>
Aseem Mahajan 5 years ago
</a> <a href="https://ibb.co/5Kf8kh6"></a> <a href="https://ibb.co/LvvPP4h"></a>
Posted by Aadya Singh 5 years ago
- 2 answers
Aadya Singh 5 years ago
Posted by Aseem Mahajan 5 years ago
- 1 answers
Posted by Aseem Mahajan 5 years ago
- 3 answers
Posted by ?Ritesh Gupta? 5 years ago
- 0 answers
Posted by ?Ritesh Gupta? 5 years ago
- 2 answers
Posted by Royal Thakur ? 4 years, 5 months ago
- 1 answers
Sia ? 4 years, 5 months ago
Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves.
Posted by Dark ..? 5 years ago
- 5 answers
Posted by Shreya Dubey 5 years ago
- 1 answers
Meghna Thapar 5 years ago
Astronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax. Simply put, they measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun. To measure large distances, such as the distance of a planet or a star from Earth, astronomers use the principle of parallax. Here, the term parallax is the semi-angle of inclination between two sight-lines to the star, as observed when Earth is on opposite sides of the Sun in its orbit.
Posted by Aadya Singh 5 years ago
- 1 answers
Posted by Aadya Singh 5 years ago
- 5 answers
Aseem Mahajan 5 years ago
$$\dfrac{sinA}{a}=\dfrac{sinB}{b} = \dfrac{sinC}{c}$$
Meghna Thapar 5 years ago
The Law of Sines is the relationship between the sides and angles of non-right (oblique) triangles . Simply, it states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all sides and angles in a given triangle.
<div class="mod" data-md="61" style="clear:none"> <div aria-level="3" class="LGOjhe" data-attrid="wa:/description" data-hveid="CBIQBQ" role="heading">The law of sines can be used to compute the remaining sides of a triangle when two angles and a side are known—a technique known as triangulation. It can also be used when two sides and one of the non-enclosed angles are known.</div> </div> <div class="g"> <div class="rc" data-hveid="CAUQAA" data-ved="2ahUKEwjP__Lby4jsAhXwxzgGHbqEB6QQFSgAMAR6BAgFEAA"> <div class="r"> </div> </div> </div>
</a>Posted by Aadya Singh 5 years ago
- 1 answers
Aseem Mahajan 5 years ago
$$\left|\hat{\imath} \;\;\;\;\;\;\; \hat{\jmath}\;\;\;\;\;\;\; \hat{k} \\ 1 \; \;\;\;\;\;\; 1\;\;\;\;\;\;\; -1 \\ 2 \;\;\;\;\;\;\; -1 \; \;\;\;\;\;\; 4 \right|$$
Solving for matrix , magnitude of cross product:
$$\hat{imath}(1 × 4 - (-1) × (-1)) - \hat{jmath}(1×4 - (-1) × 2) + \hat{k}(1 × -1 - (1 × 2)) \\ = 3\hat{\imath} - 6\hat{\jmath} - 3\hat{k}$$
Posted by Poonam Walale 5 years ago
- 0 answers
Posted by Aseem Mahajan 5 years ago
- 4 answers
Aseem Mahajan 5 years ago
█▌▒▒░████████████░▒▒▐█
█░▒▒▒░██████████░▒▒▒░█
▌░▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒░▐
░▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒░
███▀▀▀██▄▒▒▒▒▒▒▒▄██▀▀▀██
██░░░▐█░▀█▒▒▒▒▒█▀░█▌░░░█
▐▌░░░▐▄▌░▐▌▒▒▒▐▌░▐▄▌░░▐▌
█░░░▐█▌░░▌▒▒▒▐░░▐█▌░░█
▒▀▄▄▄█▄▄▄▌░▄░▐▄▄▄█▄▄▀▒
░░░░░░░░░░└┴┘░░░░░░░░░
██▄▄░░░░░░░░░░░░░░▄▄██
████████▒▒▒▒▒▒████████
█▀░░███▒▒░░▒░░▒▀██████ █▒░███▒▒╖░░╥░░╓▒▐█████ █▒░▀▀▀░░║░░║░░║░░█████ ██▄▄▄▄▀▀┴┴╚╧╧╝╧╧╝┴┴███ ██████████████████████
Aseem Mahajan 5 years ago
|\?
/ \
━━━━━┓ ＼＼
┓┓┓┓┓┃
┓┓┓┓┓┃ ヽ?ノ
┓┓┓┓┓┃ /
┓┓┓┓┓┃ ノ)
┓┓┓┓┓┃
</a>
????Posted by Dhruv .. 5 years ago
- 0 answers
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
Ao and A.U. both are the units of distances but 1Ao = 10-10m and 1A.U. = 1.496× 1011m.
0Thank You