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Ask QuestionPosted by Pooja ** 4 years, 3 months ago
- 3 answers
Aarohi Singh 4 years, 3 months ago
Posted by Pooja ** 4 years, 3 months ago
- 2 answers
Gaurav Seth 4 years, 3 months ago
1. We can multiply both the sides with zero to equalise them.
2. We can use roman numbers to prove this.
19 is written as XXIX
1 is written as I
20 is written as XXX
So, we can write it as:
XXIX - I = XXX
Hence, it is proved that 19-1= 20.
Posted by Abhishek Solanki 4 years, 3 months ago
- 1 answers
Gaurav Seth 4 years, 3 months ago
A radian is actually a SI unit to measure the angle and for a complete 360 degree the angle in radian is 2π
so on comparing we have
2π = 360
so
π = 180 degree
so to solve the angles u have to take the value of π = 180
and when u get the angle in radian with π u can solve it by using the valoue of π = 22/7.
Posted by Krishna Prajapati 4 years, 3 months ago
- 2 answers
Aarohi Singh 4 years, 3 months ago
Gaurav Seth 4 years, 3 months ago
Make a Study Plan
Make a strategic study plan for covering the entire syllabus. Set small targets to achieve on how many topics to complete in say one week, one month, three months, etc. Also, keep time for revision and mock tests in your study plan.
For more click on the given link :
<a href="https://www.examsplanner.in/articles/how-to-start-preparation-for-iit-jee-from-class-11/">https://www.examsplanner.in/articles/how-to-start-preparation-for-iit-jee-from-class-11/</a>
Posted by Khushboo Sahu 4 years, 3 months ago
- 2 answers
Posted by Khushboo Sahu 4 years, 3 months ago
- 1 answers
Gaurav Seth 4 years, 3 months ago
Answer : Angle will be 60o
Explanation:
According to the formula of and
we can write it as following-
[+2pq and -2pq will be cancel]
Theta
Posted by Khushboo Sahu 4 years, 3 months ago
- 1 answers
Yogita Ingle 4 years, 3 months ago
Let θθ be the angle between the two vectors A and B such that, |A| = |B|.
Therefore, R2=A2+B2+2ABcosθ
=>A2=A2+A2+2AAcosθ
[∵ |A| = |B| = |R|]
=>A2=2A2+2A2cosθ
=>cosθ=−1/2
=>θ=120∘
Posted by Khushboo Sahu 4 years, 3 months ago
- 1 answers
Gaurav Seth 4 years, 3 months ago
If the direction of the resultant force does not change, it means the angle between them remain the same.
Assuming the angle was initially 45 degrees, it will remain the same
Tan 45 = 2p/2p = 1
First force is doubled, it becomes = 4p
20N is added to the second force, it becomes = 2p + 20
Tan 45 = 4p/(2p + 20) = 1
4p = 2p + 20
2p = 20
p = 10 N
Posted by S G 4 years, 3 months ago
- 1 answers
Posted by Nandini Rathour 4 years, 3 months ago
- 3 answers
Gaurav Seth 4 years, 3 months ago
Given:
Percentage error in measurement of side of cube = 2 %
i.e., (Δa/a) × 100 = 2 %
To Find:
Percentage error in the volume and area of cube.
Calculation:
- Area of cube, A = a²
⇒ Percent error in area is given by
(ΔA/A) × 100 =2 (Δa/a) × 100
⇒ (ΔA/A) × 100 = 2 × 2
⇒ (ΔA/A) × 100 = 4 %
- Volume of cube, V = a³
⇒ Percent error in volume is given by
(ΔV/V) × 100 = 3 (Δa/a) × 100
⇒ (ΔV/V) × 100 = 3 × 2
⇒ (ΔV/V) × 100 = 6 %
- Thus, % error in area and volume is 4 % and 6 % respectively.
Posted by Khushboo Sahu 4 years, 3 months ago
- 1 answers
Yogita Ingle 4 years, 3 months ago
As one component of 80km/hr velocity is 40km/hr , then ;
cos (theta) = 40/80
= 1/2
(theta) = 60°
other component will be ;
cos (90-60) = x/80
80 × cos 30° = x
x = 80×√3/2
x = 40√3 km/hr
Posted by Khushboo Sahu 4 years, 3 months ago
- 1 answers
Gaurav Seth 4 years, 3 months ago
Given, two force act on a body at angle 60° , exact force is equal to 4 N
so, magnitude of resultant force is --
now, let angle between resultant force and vector force is ∅
now,
tan ∅ =
so, ∅ = 30°
hence, resultant force is 30° from forces 4N
Posted by Jugnu Jha 4 years, 3 months ago
- 1 answers
Yogita Ingle 4 years, 3 months ago
Acceleration is rate of change of velocity with time. It is denoted by ‘a’ and the SI unit is m/s2.
Average acceleration is change of velocity over a time interval.
Posted by Sarthak Gandhi 4 years, 3 months ago
- 0 answers
Posted by Dev Pal 4 years, 3 months ago
- 1 answers
Posted by Sreenath Sreenath 4 years, 3 months ago
- 1 answers
Gaurav Seth 4 years, 3 months ago
The units which are independent of each other are known as Fundamental Units. Derived Units are derived from Fundamental Units. For example, meter is a fundamental unit of length and second is a fundamental unit of time. However, meter per second (ms-1) is a derived unit of velocity. There are seven fundamental units as given in the below table:
<th>No.</th> <th>Quantity</th> <th>Fundamental Unit</th> <th>Symbol</th>| 1. | Length | metre | m |
| 2. | Mass | kilogram | kg |
| 3. | Time | second | S |
| 4. | Temperature | Kelvin | kg |
| 5 | Electric current | ampere | A |
Posted by Pro Gamer Gaming 4 years, 3 months ago
- 5 answers
Posted by Pro Gamer Gaming 4 years, 3 months ago
- 2 answers
Pooja ** 4 years, 3 months ago
Posted by Prabhat Singh 4 years, 3 months ago
- 3 answers
Anjali Anand 4 years, 3 months ago
Shabana Aijaz 4 years, 3 months ago
Posted by Riya Nirala 4 years, 4 months ago
- 1 answers
Yogita Ingle 4 years, 4 months ago
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. Distance between the two viewpoints is called Basis.
Measuring distance of a planet using parallax method
Similarly, α = d/D
Whereα = angular size of the planet (angle subtended by d at earth) and d is the diameter of the planet.αis angle between the direction of the telescope when two diametrically opposite points of the planet are viewed.
Posted by Prateek .. 4 years, 3 months ago
- 2 answers
Posted by Prateek .. 4 years, 4 months ago
- 0 answers
Posted by Prateek .. 4 years, 4 months ago
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Posted by Akshat Verma 4 years, 4 months ago
- 4 answers
Hiteswari Gadtia 4 years, 4 months ago
Hiteswari Gadtia 4 years, 4 months ago
Gaurav Seth 4 years, 4 months ago
|
Distance |
Displacement |
|
1. It is the length of path traversed by the object in a certain time.
2. It is a scalar quantity that is it has only the magnitude.
3. It depends on the path followed by the object.
4. It is always positive.
5. It can be more than or equal to the magnitude of displacement |
It is the distance traveled by the object in a specified direction in a certain time (that is the distance between the final and initial positions).
It is a vector quantity that is it has both the magnitude and direction.
It does not depend on the path followed by the object.
It can be positive, negative and even zero.
Its magnitude can be less than or equal to the distance |
Anjani Pandey 4 years, 4 months ago
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Aarohi Singh 4 years, 3 months ago
1Thank You