physical properties of air

(i) b - rays consist of negatively charged particles and have the same mass as that of an electron. (ii) Since their velocities are 1/10 t h of the speed of light they are considered as fast moving electrons. (iii) The penetrating power of b -particles is larger than that of a - particles. ..

At any temperature, the pressure of a gas depends upon its volume. If the volume is kept constant, the pressure depends upon the temperature and increases steadily with rising temperature. The constant volume gas thermometer uses the pressure at constant volume as the thermometric property..

. They are useful in showing areas of diseased and healthy vegetation. Healthy plants appear red. Young plants show bright red while those ready for harvesting appear dark red. Plants affected by drought and disease can be identified by the different color of their images compared with the dark red..

.e., a to and fro motion. A given point in the path is crossed by the body in opposite directions at regular intervals. This is called oscillatory motion. All oscillatory motions are periodic but not all periodic motions are oscillatory. On observing an oscillating system, like a loaded spring, one..

Ferromagnetism, like paramagnetism, occurs in materials in which atoms have permanent magnetic dipole moments. The strong interaction between neighboring atomic dipole moments keeps them aligned even when the external magnetic field is removed. Some important properties are: These substan..

Velocity of Sound in Gases (Newton's Formula) - We know that the properties of a medium that govern the propagation of a mechanical wave are: a restoring force an inertial mass The restoring force acting on the particles of the medium is intimately connected to the approximate elastic mod..

is the amount of magnetic flux linked with one coil when a current I flow through the other coil, then f = MI , where M is coefficient of mutual induction of two coils. Hence coefficient of mutual induction of two coils is equal to the EMF induced in one coil, when rate of change of current..

Tie the solid firmly with a thread and suspend it from the hook as shown in figure. Lower the solid in water as shown and find its weight (W 2 gf). Record the result as shown below: Weight of the solid in air: W 1 gf Weight of the solid in water = W 2 gf Apparent loss of weight of sol..

The air flows smoothly past the wing and the drag is very small. The air strikes the wing at a greater angle and the drag is increased. The air is stirred up, or the air 'burbles' and the drag is very great..

When a bar magnet is suspended freely, it always comes to rest in a north-south direction. This property is used in the construction of a mariner's compass. ..