Ask questions which are clear, concise and easy to understand.

Yogita Ingle 33 minutes 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.

Gaurav Seth 1 day, 2 hours ago

One parsec is _____ light years.

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.

Pooja Ranjna 1 day, 2 hours ago

3.26

Bhawani Sahu 1 day, 2 hours ago

one streradian is defined as the angle made by a spherical plane of area 1square metre at the centre of a sphere of radius 1 m. 😀

Yogita Ingle 1 day, 2 hours 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

Wait kaun suhani
Thanks suhani and vaishali

Bhawani Sahu 1 day, 3 hours ago

parallax is a displacement or difference on 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. 😊🤓🤓🤓
Parallax is a displacement or difference in the apparent position of an object viewed along two d/f lines of sight, and is measured by the angle or semi - angle of inclination b/w those two lines.... Hope this ans will help u.. Thank u...
Parallax is a displacement or difference in the apparent position of

Pooja Ranjna 1 day, 15 hours ago

In roman numerical 20 is written as XX

Gaurav Seth 1 day, 18 hours 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.

Gaurav Seth 1 day, 19 hours 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.

Gaurav Seth 1 day, 19 hours 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>

Piyush Gupta 1 day, 15 hours ago

R=√3^2+4^2+3×2cos90° =√9+16 =√25 =5

Priya Verma 1 day, 18 hours ago

R=root 4^2+3^2 = root 25 = 5

Gaurav Seth 2 days, 1 hour 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 Yogita Ingle 2 days, 1 hour 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∘

Gaurav Seth 2 days, 1 hour 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

Ishika Kumari 2 days, 16 hours ago

So...what is the question??🤨

Ishita Verma 3 days, 14 hours ago

Volume =a³ So V=3×2 =6%

Gaurav Seth 4 days, 1 hour 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.

Rupam Vishwakaram 4 days, 2 hours ago

The error will be 4%

Yogita Ingle 4 days, 15 hours 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

Gaurav Seth 4 days, 1 hour 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

Yogita Ingle 4 days, 18 hours 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.

Pooja Ranjna 3 days ago

answr LOGIN JOIN NOW ￼ What would you like to ask? 11th Physics Units and Measurement Measurement of Length The nearest star to our sol... PHYSICS ￼Asked on October 15, 2019 bySweety Jêthî The nearest star to our solar system is 4.29 light years away. How much is this distance in terms of parsecs? How much parallax would this star (named Alpha Centauri) show when viewed from two locations of the Earth six months apart in its orbit around the Sun ? ￼HARD Share Save ANSWER Given: The distance of the star is,=4.29 ly We know that one light year is the distance travelled by light in one year. 1 light year = 3×108×365×24×60×60                     =94608×1011m Therefore, the distance in 4.29 ly can be written as: 4.29 ly=405868.32×1011 m We know that 1 Parsec is also the unit of distance and its value is: 1 parsec=3.08×1016m Now, to express the distance in terms of parsec. 4.29ly=3.08×1016405868.32×1011​=1.32 parsec The diameter of the Earth's orbit is, d=3×1011m The angle made by the star on the Earth's orbit can be given by:  θ=405868.32×10113×1011​=7.39×10−6rad But, the angle covered in 1sec=4.85×10−6rad So, the parallax in viwing the star at two different positions of the Eart's orbit: for, 7.39×10−6rad=4.85×10−67.39×10−6​=1.52"

Divyanshi Goswami 4 days, 22 hours ago

Krishna Agrawal 5 days, 20 hours ago

Gaurav Seth 6 days 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

Swastik Mishra 6 days, 1 hour ago

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R1+R2=300+^_7 OHM

Gunjan Raghav 2 days, 20 hours ago

Muskan And Tushar Hooda 6 days, 1 hour ago

S Chand and pradeep's for chemistry and physics

Dhruv Agrawal 6 days, 14 hours ago

Xam idea for physics and Dinesh for chemistry

Krishna Agrawal 6 days, 20 hours ago

S Chand

Pooja Ranjna 6 days, 2 hours ago

In science stream, maths and physics are related to each other because they help us in engineering and biology and chemistry is related to each other because it helps in doctoring. You can see that you are right or wrong. I think you have choosed right option.😊😊👍👍

Pk . 6 days, 13 hours ago

Definitely bro....👍

Anjali Singh 1 week ago

Fundamental physical quantity have dimension& unit as well , supplementary quantity are dimensionless but have units

Shabana Aijaz 1 week ago

Yes ofcourse because it involves thetha which is demensionless

Rajni Dwivedi 1 week ago

No ## myCBSEguide

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