MEDIUM
Earn 100

There are two trains in the picture. Which fuel does the first train run on? Which fuel does the second train run on? 

Question Image  

Important Questions on Changes Around Us

EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
An object of mass 15kg is moving with uniform velocity of 4m/s. What is the kinetic energy possessed by the object?
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Write the name of two elements used as nuclear energy.
MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Write a short note on: Nuclear Energy
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Which of the following graphs best represent the graphical relationship between Kinetic Energy (K.E) and momentum (P) of a body in motion?
MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Write any four differences between nuclear fusion and nuclear fission.
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Flying birds has
HARD
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
A block of 9 kg is moving with a velocity of 4 m/s on a frictionless surface. The block comes to rest by compressing the spring. If the spring constant is 4x104 N/kg, then find the compression in the spring.
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?
MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
List any three differences between nuclear fission reaction and nuclear fusion reaction.
HARD
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes

A spring of spring constant K= 4x103N/m is compressed by 2 cm, then determine the potential energy stored in spring. 

MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes

Ratio of potential energies of body A and body B will be

Question Image

MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Explain how is nuclear energy generated in power reactors. How is electricity produced from nuclear energy?
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
How fast should a man weighing 600 N run to achieve a kinetic energy of 750 J. Take g=10 m s-2.
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Which one of the following is an example of Biomass energy source.
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Write in your words the definition of potential energy.
EASY
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Uranium is used to obtain:
MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Two bodies A and B have masses in the ratio 5:1 and their kinetic energies are in the ratio 125:9. Find the ratio of their velocities.                                                                                                                                
HARD
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Can you suggest some things other than food, petrol and batteries that have energy stored in them?
MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
Define mechanical energy. What are its two types? Give examples.
MEDIUM
Science>Chemistry>Changes Around Us>Mutual Interaction Occurring Changes
From where does your body get energy to do work?