CBSE > Class 11 > Physics | CBSE Board | Homework Help

In a rocket engine , fuel and a source of oxygen, called an oxidizer, are mixed and exploded in a combustion chamber. The combustion produces hot exhaust which is passed through a nozzle to accelerate the flow and produce thrust.

3Thank You

ANSWER

What is the advantage to f AC?

Posted by Pooja Jha 7 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Adarsh Jawale 7 years, 4 months ago

Ac generator can travel longer distance as compared to DC.

0Thank You

Tonu Tj 7 years, 4 months ago

Rocking chair

0Thank You

Golu Tyagi 7 years, 4 months ago

AC travel more in compare of dC

0Thank You

ANSWER

If energy E,velocityV, and time T are chossen at fundamental quantities the dimensional formula of surface tension will be

Posted by Panchal Kapila 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Prove that acceleration a=√(ac²+at²) ac means centripetal acceleration at means tangential acceleration

Posted by Gaurav Tripathi 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A man rows directly across a flowing river in time t1 and rows equal distance down the stream in time t2.If u is the speed of the boat in still and v of the strean,then show that t1:t2=Root over(u+v:Root over(u-v).

Posted by Priynanshu Routh 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A wheel of radius r rolls forward half a revolution the displacement of a point which is at height r from the point which is initially in contact to the ground is.. Right answer is pie r but my answer is r root pie square plus 4 can anyone solve this question??

Posted by Sakshi Sharma 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Priynanshu Routh 7 years, 4 months ago

Since the wheel revolved half so the displacement is 1/2x2pie r=pie r

0Thank You

ANSWER

A stone is dropped from the top of tower of height 100m the stone penitriate in the sand on the ground through a distance of 2m from a child find time require to stop it

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A motorist rushing at 40m/see found a Childers on the road 82m ahead he instantly applied the break so as to stop the engine within 2m from the child find time required to stop it

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What does the sloop of the position-time graph represent

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

3 answers

Somya Singh 7 years, 4 months ago

I hope it's velocity represent

0Thank You

Kamal Singh 7 years, 4 months ago

Velocity

0Thank You

Akash Thakur 7 years, 4 months ago

Nothing

4Thank You

ANSWER

If two partical move in the same straight line path with the same velocity then what is their relative displacement

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Somya Singh 7 years, 4 months ago

Negative

0Thank You

ANSWER

Can the speed of an object change if it's velocity is constant

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Akash Thakur 7 years, 4 months ago

No. Because when velocity is constant, then means zero accerleration is acting on the body. So, there is no question about change in speed.

3Thank You

ANSWER

what is the formula for resistance

Posted by Darshan Aiwale 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Parul Agrawal 7 years, 4 months ago

Potential difference ÷current

0Thank You

Alia Sharma 7 years, 4 months ago

Resistivity x lenght /area

1Thank You

ANSWER

A man weight 175lb express his weight in kg

Posted by Vikash Chaubey 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Dishfgshfhffds

Posted by Krishna Kumar Yadav 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

y=3sin^2x+4x^3+2x^2+5 find dy/dx

Posted by Roshan Jha 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Can the speed of an object change if its velocity is constant?

Posted by Kamal Singh 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Dev Tera Yaar Jaat☢️ 7 years, 4 months ago

An object can accelerate while traveling at constant speed but not at constant velocity. ... On the other hand, a constant velocity means no change in velocity (both magnitude and direction), so in this case the acceleration must be zero (no acceleration).

3Thank You

ANSWER

If the distance covered is zero ,then displacement

Posted by Unnati Baliyan 7 years, 4 months ago

CBSE > Class 11 > Physics

4 answers

Sahbaz Ansari 7 years, 4 months ago

Dipacement will be zero

0Thank You

Mohammad Haris 7 years, 4 months ago

After so much researches it is now proof in modern day the displacements of body is zero

0Thank You

Shatayu Ganvir 7 years, 4 months ago

Of course 0

1Thank You

Isha S 7 years, 4 months ago

0Thank You

ANSWER

Two balls of different masses (one lighter and other heavier )

Posted by Sagar Bisht 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Can any object accelerate from 0 velocity in any case?

Posted by Unnati Joshi 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Mohammad Haris 7 years, 4 months ago

No sir

0Thank You

ANSWER

Define the term Kennen and Wissen

Posted by Shani Singh 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is a intrigation

Posted by Ravi Kumar 7 years, 4 months ago

CBSE > Class 11 > Physics

4 answers

Anushree Agrawal 7 years, 4 months ago

It is the reverse of differentiation....

1Thank You

Nancy Rajput 7 years, 4 months ago

Integration is the process of finding an anti-derivative of a given function f. ‘Integrate f’ means ‘find an anti-derivative of f’. Such an anti-derivative may be called an indefinite integral of f and be denoted by ∫f(x) dx

1Thank You

P K T 7 years, 4 months ago

If you know differentiation then it is it's inverse only so first go for differentiation in physics it is very easy just compromise of 4 to 5 formulas in which 2 are mostly used

1Thank You

Nancy Rajput 7 years, 4 months ago

in physics or in maths

1Thank You

ANSWER

if the speed of a body is increased by 20℅ what is the percentage change in its kinetic energy

Posted by Anant Raj 7 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Hitesh Kumar 7 years, 4 months ago

44%

0Thank You

Amar Pratap Singh 7 years, 4 months ago

44%

0Thank You

ANSWER

Example of gross error

Posted by Sagar Gautam 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

The acceleration of a particle is given by a=3t*t+2t+2. If the particle starts with a v=2m/sec at time t=0 then find velocity at the end of 2sec.

Posted by Shreyash Singh 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Akanksha Gupta 5 years, 8 months ago

2Thank You

ANSWER

If x=2t²–4t+1 then find acceleration when velocity becomes zero

Posted by Murtaza Saify 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Amar Pratap Singh 7 years, 4 months ago

4m/s*s

0Thank You

ANSWER

Can you associate vector with a length of a wire bent int o a loop b a plain area explain

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Can the speed of an object change if it's velocity is constant

Posted by Abhi Saini 7 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Nidhi Rathore 7 years, 4 months ago

No,a body cannot have varrying speed with constant velocity.Velocity is a vector quntity it is constant only when both magnitude and direction of the velocity is constant

1Thank You

ANSWER

Using the dimensional formula method .Find the time period of simple pendulum.Suppose it depends on mass of bob(m) ,its length (l) and acceleration due to gravity(g).

Posted by Nidhi Rathore 7 years, 4 months ago

CBSE > Class 11 > Physics