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 PASCAL's LAW

Hydraulic BRAKES WORK on the PRINCIPLE of Pascal's law.

 Increases with depth of the wall

The pressure applied to WALLS of the dam will be a function of the AMOUNT of water that is over that PARTICULAR point on the wall. So water pressure is very LARGE at the bottom due to its large depth. That's why dams are constructed thicker at their bottoms than at their TOPS.

 Reflection

Reflection is RESPONSIBLE for the ECHO of SOUND WAVE.

 All of the above

The humidity of the AIR depends UPON WEATHER, TEMPERATURE and location.

 LAW of Conservation of Linear MOMENTUM

The recoiling of gun is an example of Law of Conservation of Linear Momentum. When gun fires a bullet, it experiences a FORCE in forward direction (action) , as a result the gun EXERTS a backward force (reaction) on the SHOULDER.

 RENEWABLE NATURAL RESOURCE

Hydro-electric POWER is a renewable natural resource.

 Spread his HANDS outwards

When a person on a turn table will raise his hands, there will be INCREASE in the momentum of INERTIA. Hence, the angular velocity of the TURNTABLE will decrease.

 INSTABILITY due to NEGATIVE resistance

Instability due to negative resistance of a TUNNEL DIODE is its drawback.

 Its BOILING POINT

Alcohol is more VOLATILE than WATER because it boiling point is LOWER than water.

 BLUE

The best wavelengths of visible light for PHOTOSYNTHESIS fall within the blue range (425–450 nm) and RED range (600–700 nm). Therefore, the best light sources for photosynthesis should ideally EMIT light in the blue and red ranges.

 The LIQUID SURFACE falls down on the direction of MOTION and rises up on the BACK side of the TANK

The liquid surface falls down on the direction of motion and rises up on the back side of the tank.

 Converts MECHANICAL energy into electrical energy

Dynamo is a DEVICE that converts mechanical energy into electrical energy. Its other name is ELECTRIC generator. A device which has a reversed effect to this is the electric motor. An electric motor is a device which converts electric energy to mechanical energy.

 Electrostatic image making

All Electrostatic Copiers work under the premise that a charge of electricity is placed on an Image Drum which has the ability to retain the electric charge much like a capacitor holds its charge but with the ability to hold or RELEASE the charge DEPENDING on how much light and darkness is applied to the Image Drum. A photocopier (also known as a copier or copy machine) is a machine that makes paper copies of documents and other visual images QUICKLY and cheaply. Most current photocopiers use a technology called xerography, a dry process using HEAT. Copiers can also use other TECHNOLOGIES such as ink jet, but xerography is standard for office copying.

 Has HIGHER elasticity

A shock absorber is a mechanical device designed to smooth out or damp shock impulse, and dissipate kinetic ENERGY. Steel is an alloy made by combining iron and other elements, the most common of these being CARBON. When carbon is used, its content in the steel is between 0.2% and 2.1% by weight, depending on the grade. Varying the amount of alloying elements and the form of their PRESENCE in the steel (solute elements, precipitated phase) controls qualities such as the higher elasticity, hardness, DUCTILITY, and tensile strength of the resulting steel.

 CONSERVATION of MOMENTUM

Rocket WORKS on the PRINCIPLE of conservation of LINEAR momentum.

 Parabolic

If a particle dropped from the top of a tower uniformly falls on ground at a distance which is EQUAL to the height of tower then a parabolic path will be traversed by a particle because when the particle is dropped that point is called the point of projection and when it REACHES the ground that point is called the point of impact. Now, if the two points is met with one another the curve EMERGES is parabolic in nature. Hence, we can say that the path followed by the particle is of parabolic trajectories.

 ECNALUBMA

 GRAPHITE

Good CONDUCTOR of ELECTRICITY is graphite.

 To decrease the CURRENT flow

The choke primarily SERVES to limit current flow to the CORRECT level for the tube. It also can be used during STARTUP to provide an inductive ‘kick’ forming a momentary higher-voltage pulse to start the lamp.

 An inductor

Choke is the Inductor coil/ballast which is used to induce high voltage across it. Then gas inside the starter gets ionized due to this FULL voltage and heats the BIMETALLIC strip that is CAUSED to be BENT to connect to the fixed CONTACT.

 HEAT

'Therm' is the UNIT of heat.

 Energy cannot be CREATED or destroyed but can be CONVERTED from one form to ANOTHER

"CONSERVATION of energy" refers to the fact that energy cannot be created or destroyed but can be converted from one form to another.

 FORCE

The dimensions of Force are M (mass), L (LENGTH) and T^-2(TIME). It can also be expressed as [newton] = [kilogram] [metre] [second]^-2.

 High RESISTANCE on series

A galvanometer is CONVERTED into a voltmeter by CONNECTING with high resistance.

 Nuclear fusion

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the HIGH PRESSURE and temperature in the sun's CORE CAUSE nuclei to separate from their electrons. HYDROGEN nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.

 Uranium

The fuel that is used in a nuclear reactor to MAINTAIN a nuclear concatenation response is KNOWN as Nuclear fuel. These fuels are FISSIONABLE, and the most POPULAR nuclear combustibles are radioactive elements such as uranium-235 and plutonium-239.

 45° with horizontal

The angle in which a CRICKET BALL should be hit to TRAVEL MAXIMUM horizontal distance is 45° with horizontal.

 Non-contact FORCE

The force EXERTED by a MAGNET is an EXAMPLE of Non-contact force.

 Both will reach the same height

Galileo’s experiment showed that if TWO bodies of unequal MASSES are dropped from the same height, the TIME required by them to reach the ground are equal. If they are thrown VERTICALLY upwards with the same initial velocity, then the ratio of the time required to reach the ground is equal to unity. This means that both of them will reach the same height.

 Red

Red light suffers the LEAST AMOUNT of deviation and VIOLET the most. When a white light is made to pass through a prism, formation of a SPECTRUM of seven colors OCCURS showing white light is a combination of seven separate colors.

 10³⁶

Electrostatic forces are 10³⁶ times STRONGER than the GRAVITATIONAL Forces for a fixed DISTANCE.

 COBALT

The DOMAIN THEORY of MAGNETISM APPLIES to Cobalt.

 Photoelectric

When fast moving electrons strike on high atomic weight SUBSTANCE, X – ray is produced. In CONTRAST, Photoelectric EFFECT takes place when radiation of sufficient frequency incident on the METAL surface and electrons are emitted. Hence, X – ray is the inverse PHENOMENON of photoelectric effect.

 4°C

Freezing takes place at he top of the lake this is because water COLDER than 4 degree celsius usually starts to expand and get less dense as it gets colder. It is the liquid with more density that SETTLES at the BOTTOM while the less denser FLOATS above it.

 COPPER is a better conductor of ELECTRICITY than iron

Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and LOW resistivity.

 Its ENERGY levels are very CLOSE to each other

For an atom to EMIT X-rays it should have DIFFERENCE in energy levels.

 Ammeter

The ELECTRIC CURRENT in one PART of a circuit is measured with an ammeter, which GIVES a reading in ampere.

 Increases

When a METAL plate with a CIRCULAR hole at its CENTRE is heated, definitely along with the areal expansion of the plate the diameter (sum of two RADII) of the circular hole ALSO increases.

 Vacuum

Sound cannot TRAVEL through a PERFECT vacuum. A vacuum is an AREA WITHOUT any AIR, like space. So sound cannot travel through space because there is no matter for the vibration to work in.

 The level of the liquid in the two VESSELS are at the same height

Siphon will fail to work if the level of the liquid in the two vessels are at the same height. Siphon is a tube BENT to FORM two legs of unequal LENGTH by which a liquid can be transferred from a RESERVOIR and then down to a lower level of it.

 Water

HEAT capacity (USUALLY denoted by a capital C, often with subscripts), or thermal capacity, is the measurable physical quantity that characterizes the amount of heat required to change a substance’s temperature by a given amount. In the INTERNATIONAL System of Units (SI), heat capacity is expressed in units of joule(s) (J) per Kelvin (K). Among iron piece, water, gold piece and benzene; water has the maximum heat capacity i.e. 4.1813 j/k.

 ELECTRONS

The ELECTRIC current in a metal WIRE is DUE to the FLOW of electrons.

 Temperature

A bolometer is a device for MEASURING the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent ELECTRICAL resistance. It was invented in 1878 by the American astronomer Samuel Pierpont Langley. A bolometer consists of an absorptive element, such as a thin layer of metal, connected to a THERMAL reservoir (a body of CONSTANT temperature) through a thermal link. The RESULT is that any radiation impinging on the absorptive element raises its temperature above that of the reservoir — the greater the absorbed power, the higher the temperature.

 RADIO Wave

The WAVES in the electromagnetic SPECTRUM that have the longest wavelengths and LOWEST frequency are called radio waves.

 Steam has latent heat of vaporisation

Steam will PRODUCE more SEVERE BURNS than boiling of water because steam has more heat ENERGY than water due to its latent heat of vaporisation and ADDITIONALLY latent heat of condensation.

 A SPHERE has the least surface AREA for a GIVEN volume

A drop of liquid assumes spherical SHAPE because a sphere has the least surface area for a given volume.

 Thunder

Sound following a flash of lightning is called Thunder. Thunder or thunder clap ALWAYS FOLLOWS lightning because light travels FASTER than sound. Thunder is CAUSED by the rush of air into the space, created by lightning as it travels from CLOUD to earth.

 Normal

The normal line DIVIDES the angle between the incident RAY and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of INCIDENCE. The angle between the reflected ray and the normal is known as the angle of reflection.

 GREEN

Blue + YELLOW PIGMENT YIELDS the COLOUR green.

 Cube of the semi-major axis

The square of the time PERIOD of the PLANET is DIRECTLY proportional to the cube of the SEMIMAJOR axis of its orbit.