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Devhuti
Subject: Science
, asked on 4/1/18
a body is thrown with a kinetic energy of 100 J find its potential energy
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
the same body is now taken from a height of 5 m to a height of 10 m find the work done
Answer
2
Devhuti
Subject: Science
, asked on 4/1/18
a body of mass 6 kg is kept at a height of 5 m from the surface of earth . find the potential energy of the body
Answer
3
Devhuti
Subject: Science
, asked on 4/1/18
state the law of conservation of energy . explain it with example
Answer
6
Devhuti
Subject: Science
, asked on 4/1/18
give reason for the following:
a) a bullet is released on firing the pistol
b) an arrow mover forward when released from the stretched bow
c) winding the spring of a toy car makes it to run on the ground
d) falling water from a dam generates electricity
e) winding the spring of our watch , the hands of the watch move
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
what kind of energy transformation takes place in the following gadgets?
a) a solar cell
b) electric heater
c) electric cell
d) electric bulb
e)steam engine
Answer
2
Devhuti
Subject: Science
, asked on 4/1/18
derive an expression for potential energy . write its SI unit
Answer
3
Devhuti
Subject: Science
, asked on 4/1/18
from the following activities listed below , state weather the work is done or not. give reasons
a) person is reading a book
b) a kite is flying due to moving air
c) an apple is falling off a tree
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
derive an expression for kinetic energy . how is it related to work done
Answer
2
Devhuti
Subject: Science
, asked on 4/1/18
what is the sequence of energy change that takes place in the production of electricity from a dam ?
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
what is the work done by the force of gravity on the moon revolving around the earth ? justify the answer
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
what is the relation between kinetic energy and amount of work done
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
what is the condition of work done to be positive
Answer
2
Shashwat Mishra
Subject: Science
, asked on 4/1/18
Why an oscillating pendulum having mechanical energy stops itself after sometime?
Answer
1
Devhuti
Subject: Science
, asked on 3/1/18
Q NO. 9,10,11
Answer
2
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What are you looking for?
a) a bullet is released on firing the pistol
b) an arrow mover forward when released from the stretched bow
c) winding the spring of a toy car makes it to run on the ground
d) falling water from a dam generates electricity
e) winding the spring of our watch , the hands of the watch move
a) a solar cell
b) electric heater
c) electric cell
d) electric bulb
e)steam engine
a) person is reading a book
b) a kite is flying due to moving air
c) an apple is falling off a tree