Everyday Science – Physics

Physics deals with properties of matter forces and energy and their various.

All the objects in the world are formed by various combinations of.

A substance in which all the atoms have the same atomic number is called.

The matter in all three phases (solid ,liquid ,and gas)is composed of tiny particles ,called _____ which are continuously in motion.

In solids and liquids the molecules move relatively _____ and interact with each other strongly.

____ is the smallest particle that can represent a particular chemical element.

Substances can be broken down into molecules and molecules can be broken down into.

The neutron is the particle with no electric charge,whereas the proton has a.

The hydrogen atom has ______ protons in its nucleus.

How much the nucleus of an atom is smaller than that of the atom ?

What is called an abbreviation for the name of an element consisting of first letter or first two letters of its name ?

Name the basic theory that explains that energy is not continuous but is composed of indivisible quanta.

_________ is defined as the emission of alpha, particles beta particles or gamma rays by disintegration of nuclei of certain unstable elements.

When radioactivity was discovered by Marie Curie ?

Artificial radioactivity can be induced by bombarding a nucleus with high velocity.

There are _____ basic products of a nuclear reprocessing plant.

Which bomb was dropped on Nagasaki on August 9, 1945 ?

The nuclear firebox is smaller than an average.

Give the formula of ordinary water.

_______ is mainly due to salts of calcium particularly the soluble bicarbonates fromed by the action of rain water and carbon dioxide from air on limestone.

There are ________ physical states of matter.

True solids have definite.

___________ solids do not have crystalline structure.

When a ______ is heated up,the kinetic energy of its atoms or molecules increases.

A liquid becomes a gas or vapour by increasing the.

The vapours above a liquid have a pressure called.

The temperature at which a solid melts into a liquid is called the ______ point of that solid.

Some solids do not melt when heated under normal conditions,instead they change directly from the solid to the gaseous state. This phenomenon is called.

Dry ice has a temperature of.

_______ is defined as the force acting on a material divided by area over which the force is applied.

Hardness of a material depends on attraction between molecules or atoms of the.

Name the hardest material which is widely used in industry for grinding and drilling.

Which is the softest material ?

Mohs is the unit of hardness of a.

Ohm is the SI unit of electrical.

The inter-atomic or inter-molecular forces that hold togcther the atoms or molecules within a solid is called.

______ in liquids is produced the inter-molecular forces between the liquid molecules in the surface.

Capillary Action is caused by the surface tension of the.

Which theory is based on the idea that gases consist of atoms or molecules moving rapidly rapidly in all directions ?

In 1662, Robert Boyle experimented with the relationship between pressure and.

The relationship between volume and temperature is given by.

Graham law states that the rate of diffusion of a gas is inversely proportional to the square root of its.

Pressure is defined as the force per unit .

The pressure o the air around us is known as.

When two substances are mixed together and they react with each other chemically then a _____ is formed.

What is formed when two substances are mixed together and they do not react chemically.

______ is defined as quantity of matter in an object.

The weight of a body is the downward force exerted by an object resulting from it being acted on by the force of.

Density of an object is the mass of object per unit.

A ______ is defined as a device for applying or transmitting mechanical power.

Velocity of a particle is defined as the rate of change of displacement with.

Name the branch of physics which deals with the ways in which object behave when they are acted on by forces.

The action which changes the state of rest or uniform motion of a body is called.

Who was the first to formulate the law of gravitation ?

While in orbit ,all occupants of a spacecraft become.

Angular displacement is angle on a circle traversed by an object and is shown by.

The angular of a rotating object is the angle through which it moves per unit.

______ is a turning force,the rotational analogue of normal force in linear motion.

In a body that moves in a circular path around a central point the force that acts toward the centre and keeps the body at a constant distance from the centre is called.

In a body that moves in a circular path around a central point,the force that acts away from the centre is called.

_______ is defined as the ability to do work.

Potential energy is due to the ____ of an object.

Matter that has gained or lost some electric charge has.

_____ energy consists of moving waves of ____ pressure in medium such as air water or metal.

Nuclear energy is produced when the _____ of atoms change either by splitting apart or joining together.

______ is done when a force makes an object move.

Name the from of energy that is possessed by all material things.

In how many modes,heat transfer can take place ?

Metals conduct heat well because of their.

Conduction is the flow of heat through a.

Heat spreads through liquids and gases mainly by.

Name the instrument to measure the temperature of an object.

During winter season when snow falls,________ is spread on the roads,that lowers the freezing point and thus snow does not make ice on the road and the road remains open for safe traffic.

Which animal has no sweat glands ?

A thermostat is a device used in refrigerators and air conditioners to maintain a constant.

Water expands from 4*c to.

Conduction and convection of heat is possible only with the movement of molecules and.

_____ is not a conductor of heat.

When a pure ______ is heated its temperature rises unit it is at its melting point an additional quantity of heat causes it to melt.

Pure _____ have precise melting and boiling points, fixed temperatures at which they change from one state to another.

Which coloured surface absorbs all light ?

There are _____ types of mirrors.

Reflection in all types of mirrors is governed by _____ principal laws.

_____ of light is a change in direction that a ray of light undergoes when it posses from a transparent medium of one density into another medium of a different density.

____ is a unit of power.

Light travels at different velocities in mediums of different.

A rainbow is always an are of a.

Red,blue and green are considered to be the.

The ______ colour of the sky results from a phenomenon called scattering.

A prism is a triangular block of glass or.

Some washing powders contain ______ compounds called optical brightness that makes fabrics appear brighter and cleaner.

Most lasers in use today are ____ lasers.

Sound waves with frequencies lower than the lowest limits of human hearing are called.

The ultrasonic waves are inaudible to.

Which electricity can be produced by rubbing an insulating material such as a polyethylene rod with a dry cloth ?

______ are more likely to be affected by lightning due to closeness with charges in the clouds.

Current electricity is the continuous flow of charges usually electrons or ions ,through a.

Resistance is the property of a _______ that causes it to resist the flow of electric current.

Which cell gradually uses up the chemical fuel it contains and cannot be recharged ?

______ is the chemical decomposition that some substances undergo when an electric current passes through them.