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A car moving with constant acceleration covers the distance between two points which are 60m apart in 6s. It's speed when it pass the second point is 15m/s.what is the speed at the 1st point and what is acceleration of the car

Posted by Prajwal Karadi 3 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

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"Anomalous expansion of water is blessing for living organisms in water" explain this statement.

Posted by Aarti Padhiyar 3 years, 9 months ago

CBSE > Class 11 > Physics

1 answers

Punam Ingale ?? 3 years, 9 months ago

The anomalous expansion of water helps preserve aquatic life during very cold weather. When temperature falls, the top layer of water in a pond contracts, becomes denser and sinks to the bottom. ... Thus even though the upper layer are frozen the water near the bottom is at 4°C and the fishes etc. can survive in it easily.

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derive sn=u+a/2(2n-1)

Posted by Sanjana Mahur 3 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

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Define dot and cross product, how unit vector are multiplied by dot and cross product?

Posted by Megha Janghel 3 years, 9 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Why melting of any substance is affected by pressure.

Posted by Aryan Singh 3 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Sahil Kumar 3 years, 9 months ago

Because change in volume or density

Sahil Kumar 3 years, 9 months ago

Because in volume or density.

ANSWER

Express kilowatt in terms of joule per second. A 150 kg car engine develops 500 W for each kg. What forces does it exert in moving the car at a speed of 20 ms-17

Posted by Kanika Dhiman 3 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

car and a truck have kinetic energies of 8 x 10 J and 9 x 10 J respectively. If they are brought to a halt at the same distance, find the ratio of the force applied to both the vehicles

Posted by Kanika Dhiman 3 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

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How to find center of a rod

Posted by Shilpi Kumari 3 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Riya Jaiswal 3 years, 10 months ago

Put in cordinates then you find centre of rod

ANSWER

What is the ratio of escape speed of earth and escape speed of moon

Posted by Himanshu Tiwari 3 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Deepali Kumari 3 years, 10 months ago

1/6

3Thank You

Yuvraj Singh 3 years, 10 months ago

1/6

ANSWER

Drops and bubble by surface tension

Posted by Vikas Samriya 3 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Drops and bubble by surface tension

Posted by Vikas Samriya 3 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Deepali Kumari 3 years, 10 months ago

It spreads in surface....

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A football is kicked 25 m t

Posted by Shanaya Khan 3 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Define gravitation potential energy

Posted by Suleman Soomwal 3 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Kanika Dhiman 3 years, 10 months ago

Energy stored when you lift an object against the force of gravity. For example - a car that is parked at the top of a hill.

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Explain law of inertia l

Posted by Poonam Dhakar 3 years, 10 months ago

CBSE > Class 11 > Physics

3 answers

Bhawna Dahiya 3 years, 10 months ago

Law of inertia fallow first law of Newton that if a body is in rest it became rest or in motion became in motion if no external force is applied on it.

Bikash Boro 3 years, 10 months ago

Laws of inertia devided into three laws

Bikash Boro 3 years, 10 months ago

Laws of inertia decided into three laws. In the first law, an object will not change its motion unless a force act's on it. In the second law, the force an object is equal to its mass times its acceleration. In the third law, when two objects interact they apply forces to each other of equal magnitude and opposite direction.

5Thank You

ANSWER

Explain law of inerti

Posted by Poonam Dhakar 3 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 5 months ago

Law of inertia, also called Newton's first law, postulate in physics that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

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State and explain Newton's second laws of motion

Posted by Poonam Dhakar 3 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Abhinav Upadhyay 3 years, 10 months ago

The rate of change of momentum is directly proportional to the unbalanced force applied on it

Priya ? Raj 3 years, 10 months ago

The rate of momentum of any object is proportional to the force applied on it, and the direction of momentum change is the same as the force F= m.a

5Thank You

ANSWER

Explain Stress strain curve?

Posted by Shivam Pandey 3 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Punam Ingale ?? 3 years, 9 months ago

Stress strain curves visually display the material's deformation in response to a tensile, compressive, or torsional load. Depending on the material being tested, a stress strain curve can indicate key properties of the material including its elastic region, plastic region, yield point, and ultimate tensile strength.

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Measurment of mass

Posted by Kadela Dinesh 3 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Poonam Dhakar 3 years, 10 months ago

Tanisha Verma 3 years, 10 months ago

Inertia

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<font color=red><font size=40>A women starts from her home at 9.00 a.m. She walks with a speed of 5kmh on a straight road up to her office 2.5 km away, stays at the office up to 5.00p.m. and returns home by an auto with a speed of 25kmh ?. Choose suitable scales and plot the x-t graph of her complete journey.<font size><font color>

Posted by Class 12 3 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 5 months ago

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The displacement c in metal of a particle moving along X axis is given by X (m)=18t+5tsquare calculate (1) Instantaneous velocity. (2) Instantaneous acceleration at t=2 second.

Posted by Vedha ..... 3 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 5 months ago

using diffrentiation method
x = 18t + 5t^2
dx / dt = 18 + 10t
v = 18 + 10t
t = 2 sec
v = 18 + 10 * 2
= 18 + 20
= 38 m / sec
t = 3 sec
v = 18 + 10 * 3
= 18 + 20
= 48 m / s
v(av) = 38 + 48/ 2
= 43 m/swc
dv / dt = 10
a = 10 m/ s

ANSWER

What is the apparent weight felt by a person in an elevator, when it is accelerating (1) upward by "a", (2) downward by "a"

Posted by Vedha ..... 3 years, 7 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 7 months ago

WHEN THE LIFT IS ACCELERATING UPWARD :
let the acceleration of lift be a
Reaction force=R=m(g+a)
Hence apparent weight of the a man is more than actual weight.

WHEN THE LIFT IS ACCELERATING DOWNWARD
REACTION FORCE=m(g-a)
hence apparent weight of man is less than actual weight .

ANSWER

Derive the expression for finding the following in case of a projectile. A hiker stands on the edge of a cliff 490m above the ground and throws a stone horizontally with an initial speed of15ms

Posted by Mohammed Isa 3 years, 10 months ago

CBSE > Class 11 > Physics

0 answers

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Principal of reductionism

Posted by Narayan Choudhary 3 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 3 years, 5 months ago

Reductionism, in philosophy, a view that asserts that entities of a given kind are identical to, or are collections or combinations of, entities of another (often simpler or more basic) kind or that expressions denoting such entities are definable in terms of expressions denoting other entities.

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Find the angle of projection for which the horizontal range and the maximum height are equal

Posted by 〽__Priitam __05 3 years, 10 months ago

CBSE > Class 11 > Physics

2 answers

Akash Kumar 3 years, 10 months ago

Tan-(4)

Akash Kumar 3 years, 10 months ago

ANSWER

define thermodynamics and first law of thermodynamics ?

Posted by Vaibhav Tyagi 3 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Bhawna Dahiya 3 years, 10 months ago

The baranch of science that deal with the study of diffrent form of energy and the quantitative relation between them is called thermodynamics. First law of thermodynamics :First law that energy is neither be created nor be destroyed it transfer from one form to another .