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India's first artificial satellite was:

The degree of closeness of magnetic field lines represents

The relation between acceleration, mass and force is given by:

A wooden block of mass 10 g is dropped from the top of a cliff 100 m high. Simultaneously, a bullet of mass 10 g is fired from the foot of the cliffupward with a velocity of $100m{s}^{-1}$. At what time will the bullet and the block meet ?

A simple pendulum A, while oscillating, rises to a maximum vertical height of 5 cm from its rest position. Another simple pendulum B of the same length as AT rises to a maximum height of 10 cm from its rest position. Which of the following is true regarding their time periods?

Consider the following statements:
A. The pressure increases as the depth increase.
B. Upthrust on a body depends on the acceleration due to gravity, the density of the liquid and the volume of the body immersed in the liquid.
Which of the following option is true?

The north-south polarities of an electromagnet can be found directly by using

A block of ice at $-{10}^{o}C$ is slowly heated and converted to steam at ${100}^{o}C.$ Which of the following curves represents the phenomenon qualitatively?

An object starting from rest moves on a straight road for time t and comes to rest finally. The distance is converted in two parts. In the first part it is accelerated at constant acceleration $\alpha$ and then decelerated at rate $\beta$. Then maximum velocity is

The sound waves travel fastest :

(a) in solids

(b) in liquids

(c) in gases

(d) in vacuum

When a force of $5N$ is applied on a ball, the ball moves in the direction of applied force for $2m$ under it's influence. Work done on the ball by the force is _________.

State one observation from everyday life which shows that sound travels slower than light.

When a hanging carpet is beaten why dust particles come out?

What is the pitch of a sound?

What is the speed of electricity in km/s and m/s

In which of the following cases, the centre of mass of a rod is certainly not at its centre?

a. The density increases from left to right up to the centre and then decrease

b. The density decreases from left to right up to the centre and then increase

c. The density continuously increases from left to right

d. The density continuously decreases from left to right

If a car is moving with certain speed, then will the person who is sitting inside the car also moves with the same speed?

A car moving along a straight highway with a speed of $126km{h}^{–1}$ is brought to a stop within a distance of 200 m. What is the retardation of the car (assumed uniform), and how long does it take for the car to stop?

Heat loss from surface by radiation can be reduced by :

If a moving body comes to rest, then its acceleration is-

A body falls freely under gravity from rest.Name the kind of energy it will possess

(a) at the point form where it falls,

(b) while falling,

(c) on reaching the ground.

The time period of a simple pendulum does not depend on which of the following factor?

A car accelerates from rest to 100 m/s in 10 seconds. If mass of the car is 50 kg then power developed by the engine is

Which of the following statement(s) is/are correct?

Air molecules move from

Out of gravitational, electromagnetic, Vander Waals, electrostatic and nuclear forces; which two are able to provide an attractive force between two neutrons

Which would require a greater force ?

The $SI$ unit of universal gravitational constant is:

What is the SI unit for work done?

How is the time period T and frequency f of an oscillation of a simple pendulum related?

Two spheres of volume 250 cc each but of relative densities 0.8 and 1.2 are connected by a string and the combination is immersed in a liquid. The tension in the string is $(g=\frac{10m}{s^2})$

The change of position of a particle along a fixed direction is called----------------

Newton explained the motion of planets around the using the___ .

An odject travels around a circle of radius 6m with speed 3pi m/s. Find the distance and displacement after 3s

Define heat energy:

a) on conventional basis

b) on the basis of kinetic theory of matter

(a) What is the difference between infrasonic waves and ultrasonic waves?

(b) Choose the infrasonic waves and ultrasonic waves from the following frequencies :

(i) 10,000 Hz

(ii) 30,000 Hz

(iii) 18 Hz

(iv) 50,000 Hz

(v) 10 Hz

The picture shows a bucket being whirled around in a vertical circle, with the help of a string at a very high but constant speed. What is the correlation between above action and the motion of the moon around the Earth?

___ is a naturally occurring magnetic substance

What is horsepower?

The power of a motor pump in your neighbour's house is $\text{20 W}$. How much water per minute can the pump raise to a height of $\text{10 m}$?