Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Chloe Carlus 5 years, 2 months ago
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Nawal Kishore Jha 5 years, 2 months ago
Aarav Rajput 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
In Physics, thermodynamics deals with temperature, heat and their relation to energy, radiation, work, and properties of matter. The energy can be of any forms such as electrical, mechanical, or chemical energy. William Thomson coined the term thermodynamics in 1749. It is derived from two Greek words “thermes” meaning heat, and “dynamikos” meaning powerful.
Sonami Barik 5 years, 2 months ago
Posted by Aarohi Singh 5 years, 2 months ago
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Posted by Geetika . 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
It is given that,
Vector, a^ =3i^+4j^
Vector, b^ = 2i^-3j^
We have to find the component of vector a along the direction of vector b.
.............(1)
N= -1.6
So, the component of vector a =3 i+4 j along the direction of b =2 i - 3 j is -1.6.
Hence, this is the required solution.
Posted by Secret Superstar 5 years, 2 months ago
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Posted by Yogita Ingle 5 years, 2 months ago
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Gaurav Seth 5 years, 2 months ago
One parsec is _____ light years.
Answer: 3.26
Explanation: Parsec is the unit of length used to measure the large distances to astronomical objects outside the Solar System. It is obtained by the use of trigonometry and parallax.
1 parsec = 3.26 light year
Therefore, one parsec is equal to 3.26 light year.
Posted by Yogita Ingle 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
Steradian, unit of solid-angle measure in the International System of Units (SI), defined as the solid angle of a sphere subtended by a portion of the surface whose area is equal to the square of the sphere’s radius. Sin
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Aarohi Singh 5 years, 2 months ago
Posted by Pooja ** 5 years, 2 months ago
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Gaurav Seth 5 years, 2 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 5 years, 2 months ago
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Gaurav Seth 5 years, 2 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 5 years, 2 months ago
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Aarohi Singh 5 years, 2 months ago
Gaurav Seth 5 years, 2 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 5 years, 2 months ago
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Posted by Khushboo Sahu 5 years, 2 months ago
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Gaurav Seth 5 years, 2 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 5 years, 2 months ago
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Yogita Ingle 5 years, 2 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 5 years, 2 months ago
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Gaurav Seth 5 years, 2 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
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Posted by Nandini Rathour 5 years, 2 months ago
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Gaurav Seth 5 years, 2 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 5 years, 2 months ago
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Yogita Ingle 5 years, 2 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 5 years, 2 months ago
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Gaurav Seth 5 years, 2 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 5 years, 2 months ago
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Yogita Ingle 5 years, 2 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.
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Gaurav Seth 5 years, 2 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 |
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Gaurav Seth 5 years, 2 months ago
A steradian
is the SI unit of solid angle.It can be defined as the solid angle substended at a center of an unit,sphere by a unit area on its surface.For a general sphere of radius r, any portion on its surface with area A=r2
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