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Recent questions tagged olympiad
Questions
Which among the following cover crops are rotated with cash crops and act as green manure that replenishes nitrogen and other critical nutrients.
cbsc
class 5
olympiad
science
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
What type of simple machine is found on the floor of a bathtub?
cbsc
class 5
olympiad
science
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
What can reduce the amount of sunlight received by plants to carry out photosynthesis and leads to the production of tropospheric ozone which damages plants?
cbsc
class 5
olympiad
science
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
What might directly occur when there is a powerful whirling wind with pouring rains and strong winds and an eye at the centre of it which has clear skies and calm air?
cbsc
class 5
olympiad
science
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
In birds fertilization takes place in
cbsc
class
5
olympiad
science
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
Grains are separated from stalks by a process called
cbsc
class 5
olympiad
science
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
Which of the following is NOT stimulus that a living thing might sense and respond to?
cbsc
class 5
science
olympiad
t3
asked
Nov 1, 2017
by
priyanka.c
1
answer
Which line of the graph represents the greatest speed?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
Bats catch the prey by using the technique of
cbsc
class 9
olympiad
science
physics
t9
asked
Nov 1, 2017
by
priyanka.c
1
answer
Read the passage below and answer the question <br><br> Sound waves are longitudinal waves, which means they vibrate in the same direction as the direction of travel. Sound waves can only travel through solids, liquids or gases. A good model of sound waves is a spring. The section of waves when they are pushed together are areas of compressions and when the particles are far apart the areas are called rarefactions. Sound waves can be reflected, refracted and diffracted. <br><br> The hearing range of Human ear is 20Hz to 20KHz. Sounds with frequencies below 20Hz are called Infrasound and sound waves with frequencies above 20KHz are called Ultra sound. These waves have a wide applications in various fields like industry, medicine, agriculture etc; Speed of the sound can be calculated by the equation speed of sound = distance / time. <br><br> QUESTION : Similarities between light and sound waves are
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
Read the passage below and answer the question <br><br> Sound waves are longitudinal waves, which means they vibrate in the same direction as the direction of travel. Sound waves can only travel through solids, liquids or gases. A good model of sound waves is a spring. The section of waves when they are pushed together are areas of compressions and when the particles are far apart the areas are called rarefactions. Sound waves can be reflected, refracted and diffracted.<br><br> The hearing range of Human ear is 20Hz to 20KHz. Sounds with frequencies below 20Hz are called Infrasound and sound waves with frequencies above 20KHz are called Ultra sound. These waves have a wide applications in various fields like industry, medicine, agriculture etc; Speed of the sound can be calculated by the equation speed of sound = distance / time. <br><br> QUESTION : Sound waves are longitudinal waves because
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
Sound waves travel fastest through
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
How much energy is transferred by a 50W lamp in 5 s?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
What is the gravitational field strength of the Moon?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
What is the momentum of a 50 kg object moving at 30 km/hr?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
Which of the following is not a safety feature of a car to absorb momentum
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
A 50kg object is moving with a speed of 20m/s. How much force is needed to stop it in 5s?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
Which of the statements is not true? <br> 1. when a car moves along the road with a constant speed, the net force acting on the car is zero <br> 2. linear momentum is the product of mass and acceleration <br> 3. A body at rest continues to be at rest and a body in uniform motion continues to move <br> 4. The flight of rockets is in accordance with Newton's third law of motion
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
What will happen to a car, if its resultant force is acting along the direction of its motion?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
The resultant force is a force
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
Newton's first law states
cbsc
class 9
olympiad
science
physics
t6
asked
Oct 31, 2017
by
priyanka.c
1
answer
What does the horizontal line in a distance-time graph represent?
cbsc
class 9
olympiad
science
physics
t6
asked
Oct 31, 2017
by
priyanka.c
1
answer
A car travels 100 m in 5 minutes. What is its average speed?
cbsc
class 9
olympiad
science
physics
t6
asked
Oct 31, 2017
by
priyanka.c
1
answer
Velocity of sound is independent of
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
The velocity of sound in dry air is
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
0
answers
On driving a scooter for a long time, the air pressure in the tyres slightly increases
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
Cloudy nights are warmer than clear ones because
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
When a body is immersed partially or fully in a fluid, the _______ force from the surrounding fluid acts on the body.
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
The bags and suitcases are provided with broad handles
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
In any kind of collision
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
When a body is thrown up, work done by gravity is
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
Work done is a
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
Which of the following statement is not true? <br> 1. The velocity in uniform motion doe not depend upon the time interval <br> 2. External force is required for an object to be in uniform motion <br> 3. For a uniform motion along a straight line in a given direction, the magnitude of the displacement is not equal to the actual distance covered by the object. <br> 4. The average speed is equal to the arithmetic mean of individual speeds.
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
A rocket with a lift off mass 20,000 kg is balanced with a net initial acceleration of 5 $m/s^2$, then the initial thrust of the blast is
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
Read the following passage and answer the question below <br><br> A uniform circular motion is the motion of an object travelling at a constant speed along a circular path.<br><br> Centripetal force is the force required to move the body uniformly in a circle. This force acts along the radius and towards the centre of the circle. In fact when a body moves in a circle, the direction of motion at any instant is along the tangent to the circle at that instant. In other words the direction of motion of a body goes on changing continuously.<br><br> According to Newton's 1st law of motion, a body cannot change its direction of motion by itself. An external force is required for this purpose. It is this force which is called as the centripetal force.<br><br> On account of a continuous change in the direction of motion of the body, there is a change in the velocity of the body. Hence it undergoes an acceleration which is called centripetal acceleration.<br><br> QUESTION : Centripetal force is the force which always acts ________ the centre
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
Read the passage below and answer the question <br><br> A uniform circular motion is the motion of an object travelling at a constant speed along a circular path.<br><br> Centripetal force is the force required to move the body uniformly in a circle. This force acts along the radius and towards the centre of the circle. In fact when a body moves in a circle, the direction of motion at any instant is along the tangent to the circle at that instant. In other words the direction of motion of a body goes on changing continuously.<br><br> According to Newton's 1st law of motion, a body cannot change its direction of motion by itself. An external force is required for this purpose. It is this force which is called as the centripetal force. <br><br> On account of a continuous change in the direction of motion of the body, there is a change in the velocity of the body. Hence it undergoes an acceleration which is called centripetal acceleration. <br><br> QUESTION : Motion of a body along a circle is
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
The bouncing of a rubber ball on a cement floor is an example of
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
When a spring is pulled the work done by the spring force is
cbsc
class 9
olympiad
science
physics
t10
asked
Oct 31, 2017
by
priyanka.c
1
answer
The mechanical energy of a system is
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
Whenever there is no loss in kinetic energy during collision it is called
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
Read the passage below and answer the question <br><br> In considering the effect of force on motion, linear momentum is very important. This can be understood from the following examples: <br><br> 1. We know that a much greater force is required to push a truck than a car to bring them to the same speed in the same time. Similarly a greater opposing force is needed to stop a heavy body than a light body in the same time, when they are moving with the same speed. Thus the mass of a body is an important parameter that determines the effect of force in its motion. <br> 2. Speed is another parameter to consider. A bullet fired from a gun can easily pierce through a target like human tissue, before it stops, resulting in grave injury. The same bullet thrown at a moderate speed can be easily stopped. Thus for a given mass, greater is the speed, greater is the opposing force needed to stop the body in a certain time. <br><br> QUESTION : When we consider the effect of force on its motion
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
Read the passage below and answer the question <br><br> In considering the effect of force on motion, linear momentum is very important. This can be understood from the following examples:<br><br> 1. We know that a much greater force is required to push a truck than a car to bring them to the same speed in the same time. Similarly a greater opposing force is needed to stop a heavy body than a light body in the same time, when they are moving with the same speed. Thus the mass of a body is an important parameter that determines the effect of force in its motion.<br> 2. Speed is another parameter to consider. A bullet fired from a gun can easily pierce through a target like human tissue, before it stops, resulting in grave injury. The same bullet thrown at a moderate speed can be easily stopped. Thus for a given mass, greater is the speed, greater is the opposing force needed to stop the body in a certain time. <br><br> QUESTION : The important parameters of linear momentum are
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
The function of mud guards in a vehicle is due to
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
A train of 150 m/s if travelling towards north direction at a speed of 10 m/s. A bird flies at a speed of 5 m/s towards sound direction along the railway track. What will be the time taken by the bird to cross the train?
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
Under what conditions is the average velocity equal to the instantaneous velocity?
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
The branch of physics which deals with the study of material objects at rest is called
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
What will be the weight of an object at the centre of the earth?
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
Why is gravitational potential energy negative?
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
When the separation between two bodies is of infinite distance then the gravitational force is
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
Which of the following are correct statements. <br><br>When a wave passes through a medium <br> 1. the particles of the medium are disturbed <br> 2. the energy of the medium is disturbed <br> 3. the velocity of particles through the medium remains a constant <br> 4. there is a change in density and pressure of the particles
cbsc
class 9
olympiad
science
physics
t9
asked
Oct 31, 2017
by
priyanka.c
1
answer
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