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CBSE Class 9 Answered

what would have happened if nature had not allowed the transformation of energy?
Asked by Pratik Sharma | 22 May, 2013, 06:39: PM
answered-by-expert Expert Answer
If nature had not allowed the transformation of energy, no matter would have been created from the primordial energy present at the Big Bang. There would therefore have been no Big Bang and the universe would simply not exist.
Answered by | 22 May, 2013, 11:11: PM

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CBSE 9 - Physics
An object of mass 1kg is falling from the height h=10m.calculate a) the total energy of an object at h=10m b) potential energy of the object when it is at h=4m c) kinetic energy of the object when it is at h=4m d) what will be the speed of the object when it hits the ground
Asked by mailtoparvathyprajith | 08 Feb, 2024, 06:45: PM
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CBSE 9 - Physics
1)state energy conversion takes place in hydroelectric power plants? 2)an object of mass 1kg is falling from a height of 10 m. Calculate i) the total energy of object at h=10m ii) Potential energy of an object when h=4m   3)Name energy transfers which occurs when a)an electri bell rings b)someone speake into a microphone c)there is a picture on television screen d)A torch is on  
Asked by mailtoparvathyprajith | 08 Feb, 2024, 12:32: PM
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CBSE 9 - Physics
3)A body does 20 joules of work in 5 seconds what is power
Asked by mailtoparvathyprajith | 06 Feb, 2024, 09:00: PM
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CBSE 9 - Physics
when an arrow is shot from its bow it has kinetic Energy. From where does it get the kinetic Energy
Asked by mailtoparvathyprajith | 06 Feb, 2024, 08:44: PM
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CBSE 9 - Physics
If person A reaches the 2nd floor Of a shopping mall by lift and Person B reaches the same floor by stairs and both their masses are same. Is work done by person B is greater than Person A  against gravitational force.Justify your answer
Asked by mailtoparvathyprajith | 06 Feb, 2024, 08:24: PM
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CBSE 9 - Physics
calculate the amount of work required to stop a car of 1000kg moving with speed of 72km/h
Asked by sadhanaasadhanaa67 | 04 Feb, 2024, 12:27: PM
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CBSE 9 - Physics
Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km hour
Asked by vkjainj56 | 30 Nov, 2023, 12:00: AM
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CBSE 9 - Physics
difference between kinetic energy and potential energy
Asked by mattooamit4u | 28 Nov, 2023, 12:36: PM
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CBSE 9 - Physics
Chapter 10 work and energy
Asked by deadloxyt15 | 10 Oct, 2023, 01:04: PM
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CBSE 9 - Physics
kinematics
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Asked by palagarapapamma1982 | 26 Sep, 2023, 08:50: PM
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