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r a circle of radius and SUPPOSE that the object starts from and moves on the circle counter clockwise. It reaches the point exactly after covering th of circumference. So the DISPLACEMENT is GIVEN by the DISTANCE between STARTING and final positions : displacement =

cars have the bumpers with a larger surface area and this is because it leads to LESS impact of force by ANYTHING in OPPOSITE direction. If it is not so, the impact would be more CAUSING some destruction in car.B] Energy = F.s = m.a.sPower = E/t = m.a.s/t = m.a.v  (a=g=10m/s)Total Power of crane = (500+300)(0.2)(10) = 1600WPower of Resistance = 1200(0.2)(10) = 2400WSo, the power required to raise the load = 2400-1600 = 800W

energy is the energy that binds the ATOMIC particles like protons, neutrons and ELECTRONS all together in one atom.Atomic energy is mainly the energy of attraction in the nucleus.  When two nuclei are merged together into one nucleus by FUSION , then a lot of atomic energy is released.When a nucleus of a heavy atom is bombarded with some protons and neutrons at high speeds, the nucleus breaks into two smaller nuclei.  This process called FISSION releases a lot of atomic energy.Atomic weight is the mass of the nucleus, which is the sum of number of protons multiplied by the mass of protons and the number of neutrons multiplied by the mass of neutrons.====Relation:   Atomic energy is more in the heavier ATOMS.  When heavier (more atomic weight) atoms are broken, there is more energy.   Atomic weight of the nuclear MATERIAL changes when atomic energy is released.  In fact the material gets converted into material of smaller atomic weight, when fission happens.

will it RUN in SPACE then

, , where Time-period, MASS attached to the SPRING, spring-constant.Now if spring is CUT into half its spring-constant, k, doubles.Hence time period, T, is decresed by  times.The above explanation is valid only if spring is ideal, i.e. massless.A more general formula is ,here,  mass of spring.I believe you can find the MODIFIED time-period.

the LIQUID =2(750)=1500kg. Mass of water =3(1000)=3000KG. TOTAL mass =4500kg. Total volume =5cu.m. Density = total mass divided by total volume =4500kg/5cu.m=900kg/cu.m.     (cu.m.=m3 )

c Electric Heater/GeyserWorking principle (Physics)      The Joules HEATING EFFECT of an electric resistance is used to heat water.    We use electric geysers at homes or in clinics or shops to heat water.  It is cylindrical shaped and is mounted on walls. It has a capacity of 50 to 250 liters.  See diagram.    It consists of a water container vessel with an inlet for cold water and an outlet for hot water. The heater contains a thick (tubular) electric conductor (metallic resistance) coil element. It gets heated due to the dissipation of energy when current passes through it. The heat energy is transmitted to water through conduction and convection mechanisms. Usually the heating element is made of Nickel or chromium.     There is a mechanism to measure the temperature of water using a thermostat. It shuts off, automatically, the current supply to the heating element, when the temperature is above a preset value. This is set in the factory.  There MAY be LEDs or small bulbs to indicate WHETHER the heater is switched on or off.    The water container is usually made of a material which does not get corroded or rusted easily.  The water container is protected with insulating material and air gap so that the heat energy is retained inside the container.  The materials for the outer casings are usually stainless steel, plastic and china glass. Plastic is safer to prevent from leakages and shocks. =========================================Power and rating related information:     The heater is usually based on AC voltage. It is given a rating : power it consumes, current it passes when the rated voltage is applied. Voltage rating V could be 220 V in countries like India and 110 V in USA. Power rating P could be 1 KW to 5 kW depending on size.       Heating Power P = V² / Resistance of heating coil.     If the water tank capacity is L liters, then rate of heating is:                = P / (L * density * specific heat )  = P / ( L * 1 * 4181) =                = P / (4181 L)  °K / sec     If we want to heat water from 20° to 50°, then it takes time T =                   T = 30 * 4181 L / P = 2000 L / P  minutes.     If people could wait for 15 minutes for L litres , then                    Power needed P = 2000 L /  L = 2 kW ==================================================Instant Heaters     We get instant heaters also. They have a small capacity (2 litres). The water is heated at a constant rate as the water flows through the geyser.  There is no storage and not much insulation provided in this type of heaters.  A heating (electric resistor) coil is used in them. The wattage could be around 2 kW.  Care must be taken as if there is not enough water, it may burn the coil.  Flow of water can be decreased or increased to have hotter or colder water.

cular motion in Mag field. Thus This IMPLIES R must get doubled when the velocity is doubled.Ans- 2R

quations of motion are:1. V=u+at2. s=ut+1/2at²3. v²-u²=2asHere, v is final velocity ,u is initial velocity , t is time , a is acceleration , s is the distance travelled .To LEARN these equations of motion , it is important to know the derivation of the equation.To solve the NUMERICALS , it is necessary to remember the formula and its derivation. Read the QUESTION carefully and understand it .Before SOLVING the numerical , state what is u,v,s,t, and so on , then it is easy to solve it .

cal equation in which the number of atoms of different ELEMENTS on the reactant SIDE are same as those on the PRODUCT side is called a balanced  CHEMICAL equation.

ar system means that the sun and the other eight planets revolving around it such as dwarf planets and other comets and asteroids like moon  or solar system is located in the MILKY way galaxy its orbital SPEED is 220 km its AGE 4.568 YEARS it has eight planets mercury,venus,mars ,saturn,jupiter,uranus,earth,neptune,

andle can BURN in ZERO gravity,but what matters here is that there will be a CHANGE in the flame

tands for small or weak,gravity is the FORCE of attraction.hence MICROGRAVITY can be defined as very small or weak gravity....REGARDS, SUSHANTH

? COMPLETE the QUESTION then i will EDIT this ANSWER

is ALSO a POLYMER.

able NUCLEUS FORMED by the coalescence of an atomic nuclus with a captured particle .

binding.........................................binding energy means the energy required to seperata one SYSTEM into seprately.a BOND energy is less than its constituent parts.At  the atomic binding energy of the atom derives from electromagneticinteraction and is the energy required to disassemble an atom into free electrons and a nucleus.At the NUCLEAR level, binding energy is also equal to the energy liberated when a nucleus is created from other nucleons or nuclei. This nuclear binding energy is derived from the nuclear force and is the energy required to disassemble a NUCLEAUS  into the same number of free, unbound NEUTRON and protons it is composed of, so that the nucleons are far/distant enough from each other so that the nuclear force can no longer cause the particles to interact.

e first ONE is "beta", the second one is "gamma" and the third one is "ALPHA". All of them are greek letters and are usually USED to represent an unknown VALUE in PHYSICS.

of air varies with change in temp.,which leads to changes in optical DENSITIES of the air medium above the fire hence refractive index changes at every MOMENT and bending of light will be DIFF. at diff. MOMENTS ... Hence it APPEARS like that

number is 89so, PROTON = 89      electron = 89for neutron N = 231-89 = 142ans is C

nning2. CNG -COMPRESSED natuaral GAS

of WEATHER CHANGE

than...............................................

ing of POWDER on the CARROM board   REDUCES  FRICITION.........

cess of DEPOSITING a LAYER of any desired metal on another material by means of ELECTRICITY is called ELECTROPLATING

t dry AIR as an ideal gas.Volume = V1          T1 = 300 Kelvin        Pressure = P1V2 = V1 / 9              γ = ratio of specific heats = 1.5      T2 = ?    P2 = ?number of moles  n is fixed.     P1 V1 / T1  = P2 V2 / T2     P1 V1 / 300 =  P2 (V1 /9) / T2      =>     T2 =  33.33  P2 / P1   Is the gas compressed adiabatically and/or SUDDENLY ? with no energy exchanged between the SYSTEM and the environment ?  It has to be mentioned whether it  was an ISOBARIC compression or adiabatic compression.  Otherwise the final pressure is to be mentioned.   T2 = 300 * √9 = 900⁰K  = 627⁰ C

e terminal of the batteryhope ds my HLP U if so MRK it as bst PLZZZZZZZZZZZZZ

sage of electric CURRENT through a SOLUTION cases chemical effecthope this ANSWER MAY help u if so mrk it as BST plzzzzzzzzzzzzzzzzzzzzzz

water from the WELL,            we have to  PULL  or EXERT a Force (upwards)  or   Exert a torque at the ROPE.

the distances are :       AB = 20 KM            CD = 4 km            CB = 8 kmfinding:   DB = CB - CD =  8 - 4 = 4 km   AC = AB - CD = 20 - 8 = 12 km    Displacement associated with direction also along with a magnitude.  Let us say that the displacements towards the right side direction are positive.  The displacements towards the left are negative.  Let the unit VECTOR towards right be denoted by .   Displacements:=====================2)  distances :  AB = 15 km      AD = AB - DC - CB = 15 - 5- 8 = 2 km     DC = 5 km             EB = DB - DE = 5 + 8 - 11 = 2 km           CE = CB - EB = 8 - 2 = 6 km     displacements :you can write the other displacements from some more  points to others, in the same manner.

B  go around planet  P in circular orbits of radii 4 R and  R respectively.velocity of a SATELLITE = vmass of a satellite = MMASS of planet = Mradius of ORBIT = Rcentripetal FORCE =  m v² / R = G M m / R²             =>  v² = G M / R     velocity of a satellite is inversely proportional to the radius of the orbit.        v_B² / v_A²  =  R_A / R_B         v_B² = 4 R / R * (3 V)² = 36 V²   v_B = velocity of satellite B =  6 V,  twice the velocity of satellite A.

=  1 gmpressure P = 1 atmvolume V = 1,671 cm³Let the ABSOLUTE temperature of water be = T ⁰K   USING the ideal gas law:    P V = n R T             1.013 * 10^5 * 1,671 * 10⁻⁶ = 1/18 mole * 8.314 J/⁰K/mole * T                  T = 366.48⁰Kwork done in expansion of the vapour from 1 cm³ water to 1671 cm³ vapour: at 1 atm. pressure:   P (V2 - V1) = 1.013 * 10⁵ N/m² * (1671-1) * 10⁻⁶ m³            = 169.17 Joules = 169.17/4.184  cal = 40.43 CalLatent HEAT of vapourization = 540 cal / gm = 2257 J/gmThe increase in the internal ENERGY = latent heat -  work done in expansion                    = 540 cal - 40.43 cal = 500 cal  nearly.