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Recent questions tagged cbsc

The wind distributed throughout the lower atmosphere are called as ______

asked Nov 3, 2017 by priyanka.c

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What is the main reason behind wind generation ?

asked Nov 3, 2017 by priyanka.c

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The cosmic rays from the sun is deflected from entering the earth by _______

asked Nov 3, 2017 by priyanka.c

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After attending Arjun goes back home driving his car. He rode for 9 km in the east direction and found that he had crossed his house. In order to reach his home he had to travel 2 km in the west direction. The entire journey took him 5 hours. At what speed did Arjun travel averagely ?

asked Nov 3, 2017 by priyanka.c

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What is the metallic ball in a pendulum called?

asked Nov 3, 2017 by priyanka.c

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Prathithi enjoys playing in the swing. She moves fast as much as possible. Now what is the type of motion of the swing Prathithi is playing with?

asked Nov 3, 2017 by priyanka.c

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The day to day condition of the atmosphere at a place with respect to the temperature, rainfall, wind speed is called as _______.

asked Nov 3, 2017 by priyanka.c

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Heat energy is measure in the units of

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The rate of change of position of an object with time in a given direction is called

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A greater effort is required to stop a bullet from the gun than to stop a bullet of same mass which is thrown by the hand. This is due to

asked Nov 3, 2017 by priyanka.c

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The law of inertia was formulated by

asked Nov 3, 2017 by priyanka.c

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When a bus takes a sharp turn a person sitting in the bus experiences a force acting away from the centre of the curved path. This is due to

asked Nov 3, 2017 by priyanka.c

0 answers

Read the passage and answer the question below <br><br> Different objects may take different amounts of time to cover a given distance. Some of them move fast and some move slowly. The rate at which objects move can be different. Also, different objects can move at the same rate. One of the ways of measuring the rate of motion of an object is to find out the distance travelled by the object in unit time. This quantity is referred to as speed. The SI unit of speed is ms-1. To specify the speed of an object we require only its magnitude. The speed of an object need not be a constant. In most cases, objects will be in non-uniform motion. Therefore we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is the total distance divided by the total time taken. If the speed of the object is v, then v = s/t, where s I the distance travelled and t is the time taken. <br><br> QUESTION : When an object covers unequal distances in equal intervals of time then it is said to be

asked Nov 3, 2017 by priyanka.c

1 answer

Read the following passage and answer the question below <br><br> Different objects may take different amounts of time to cover a given distance. Some of them move fast and some move slowly. The rate at which objects move can be different. Also, different objects can move at the same rate. One of the ways of measuring the rate of motion of an object is to find out the distance travelled by the object in unit time. This quantity is referred to as speed. The SI unit of speed is ms-1. To specify the speed of an object we require only its magnitude. The speed of an object need not be a constant. In most cases, objects will be in non-uniform motion. Therefore we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is the total distance divided by the total time taken. If the speed of the object is v, then v = s/t, where s I the distance travelled and t is the time taken. <br><br> QUESTION : An object travels from A to B at 40 m/s and from B to A at 60m/s. Then its average speed is

asked Nov 3, 2017 by priyanka.c

1 answer

If the radius of the earth becomes twice its original radius without change in its mass, what will happen to your weight?

asked Nov 3, 2017 by priyanka.c

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An astronaut tries to drop an object from a height of 10 m on the surface of the moon. How long will it take to reach the moon's surface? [take g= $10m/s^2$]

asked Nov 3, 2017 by priyanka.c

1 answer

The value of g is

asked Nov 2, 2017 by priyanka.c

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The kinetic energy of a ball of mass 1kg moving at a speed of 20 cm/s is

asked Nov 2, 2017 by priyanka.c

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What will be the time taken to do 1320 J of work at the rate of 110W?

asked Nov 2, 2017 by priyanka.c

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The sensory cells of cochlea are called

asked Nov 2, 2017 by priyanka.c

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The term that describes how the brain interprets the frequency of sound is called

asked Nov 2, 2017 by priyanka.c

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The frequency of a sound wave has 1000 Hz and a wavelength of 34 cm. How long will it take to travel 1 km?

asked Nov 2, 2017 by priyanka.c

1 answer

The property of sound which is used in stethoscope is

asked Nov 2, 2017 by priyanka.c

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The wavelength of a sound wave whose frequency is 300 Hz and speed 330 m/s is

asked Nov 2, 2017 by priyanka.c

1 answer

When we increase the loudness of sound produced by a radio, the property of the sound wave that changes is

asked Nov 2, 2017 by priyanka.c

1 answer

Ultrasonic waves are used for detecting objects under water. What technique is used for this ?

asked Nov 2, 2017 by priyanka.c

1 answer

In which of the following cases is the potential energy of the spring minimum?

asked Nov 2, 2017 by priyanka.c

1 answer

The work done by the weight of a 1.5 kg mass when it moves through a distance of 2m is

asked Nov 2, 2017 by priyanka.c

1 answer

Read the passage below and answer the question <br><br> If the displacement of an object is perpendicular to the force acting on it, the work done by the force on the object is zero. Consider for example, the force of gravity acting on an aero plane flying in the sky. The force of gravity is in the downward direction, whereas the aero plane's displacement is in the horizontal direction, I.e; the force and the displacement are perpendicular to each other. There is no displacement in the direction of the force of gravity, and therefore, the work done by it on the aero plane is zero.<br><br> QUESTION : When the porter climbs up a staircase the work done is

asked Nov 2, 2017 by priyanka.c

1 answer

Read the passage carefully and answer question <br><br> If the displacement of an object is perpendicular to the force acting on it, the work done by the force on the object is zero. Consider for example, the force of gravity acting on an aero plane flying <br><br> in the sky. The force of gravity is in the downward direction, whereas the aero plane's displacement is in the horizontal direction, I.e; the force and the displacement are perpendicular to each other. There is no displacement in the direction of the force of gravity, and therefore, the work done by it on the aero plane is zero.<br><br> QUESTION : A porter is moving a distance of 'd' m, with a heavy load on his head. The work done by this porter is

asked Nov 2, 2017 by priyanka.c

1 answer

Density of gold is $19300 kg/m^3$. Then its relative density is

asked Nov 2, 2017 by priyanka.c

1 answer

An object which has a mass of 15 kg is taken to the moon. What will be its mass there?

asked Nov 2, 2017 by priyanka.c

1 answer

The velocity of a ball, which is projected with an initial velocity u, to a height h, its maximum height is

asked Nov 2, 2017 by priyanka.c

1 answer

The momentum of an object whose mass is 10 kg and velocity 15 m/s is

asked Nov 2, 2017 by priyanka.c

1 answer

The slope of displacement graph indicates

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1 answer

A train starts from station A and attains a velocity of 30m/s in one minute. Then its acceleration is

asked Nov 2, 2017 by priyanka.c

1 answer

If a particle covers equal distances in equal intervals of time, it is said to be

asked Nov 2, 2017 by priyanka.c

1 answer

What is called regional metamorphism?

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1 answer

How long would you check to see if an unconscious casualty is breathing normally ?

asked Nov 2, 2017 by priyanka.c

2 answers

Muscles connected to bones by tough cord like tissues called

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1 answer

What is the function of red blood cells

asked Nov 2, 2017 by priyanka.c

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Which of these is not an example of inclined plane?

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1 answer

Incomplete burning of petol or diesel in vehicles creates __________ gas which is very poisonous.

asked Nov 2, 2017 by priyanka.c

1 answer

What makes a tomato dark colored ?

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How does a jellyfish move?

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Which one of the following condition is not essential to grow maize ?

asked Nov 2, 2017 by priyanka.c

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What is the response in the following situation? Over several weeks, a tomato plant grows towards the window with the sunlight shining through

asked Nov 2, 2017 by priyanka.c

1 answer

Based on what characteristics rocks are classified?

asked Nov 2, 2017 by priyanka.c

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What should your first action be when treating an electric burn?

asked Nov 2, 2017 by priyanka.c

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The part of the bone which is solid, hard outside part of the bone is called

asked Nov 2, 2017 by priyanka.c

1 answer

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