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d to know a few things to answer this, and make some ASSUMPTIONS. kinetic energy = 1/2 m *V^2 Momentum = m *v If we assume the gun is not fixed in any way ( say HANGING from strings) we can assume that the effective mass is 10 kg. Because, under simple Newtonian mechanics, momentum must be CONSERVED, m * v ( gun ) = m*v ( bullet), so the net momentum of the system remains zero. So from the weights, it is easy to FIGURE out the relative velocities of the two parts of the system. So we know now all you need to do is plug that velocity into the formulae for kinetic energy.I’m not going to do the sums for you- you need to do your own homework to understand it!

f light in VACUUM = 3 X 10 ^8Refractive index = 1.51.5 = 3 *10^8 /x    (x here stands for the speed of light in a medium )X = 3*10^8/1.5X=2*10^8

energy is PROPORTIONAL to V^2if K.E. is increased by 300% final K.E. will 4K.E. so, final v will be 2vinitial momentum P = mvfinal momentum p' = m2v so, momentum will INCREASE by 100%

adiated will become 1/8 TIMES it's initial value power is directly PROPORTIONAL to it's area and it's fourth power of temperature

he ATTACHMENT

s first law. The first law states that if the NET FORCE (the VECTOR sum of all forces acting on an object) is zero, then the velocity of the object is constant. ... An object that is in motionwill not CHANGE its velocity unless a force acts upon it.

of BLOCK in AIR =60 Nweight of block underwater=52Nbuoyant FORCE ACTING on it=60-52=8N

of VIBRATION PER SECOND is CALLED frequencyv=1/T v=1/6v=.166hz

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done because displacement is zero in uniform CIRCULAR MOTION

ity moon's MASS is 1/80th of EARTH Mass As well as its RADIUS is 1/4th of the Earth Radius

vitational FORCE EXERTED by SUN .....

on the surface of moon is 20Nand SINCE MASS is constant than its mass will be 12.24 KG

ry for the answer being scattered, but hope you can understand. The CALCULATIONS are all done in the attached files and the rest is typed.Let, the mass of the EARTH be M and its radius is R. The force of gravity on a body of mass m at a distance X from the centre of the earth is (GMm)/x^2.For a small displacement dx of the body against this force of gravity, the work done will be (GMm)/x^2 × dx. Hence the work done to displace the body frim the earth surface to an infinite distance will be GMm/R.If the escape velocity from earth is V, then the kinetic energy of the body is This kinetic energy will be responsible for the work done by the body.so, v= √(2GM/R).Now. let the excape velocity at moon be vm and on earth's surface, let it be ve.

oil velocity of the rifle is -0.6 m/s. This is a conservation of momentum problem. The explosion of the gunpowder is an internal force allowing us to use the conservation of momentum. Initially the rifle and the bullet are at rest. Σ P 0 = Σ p f 0 = m R v r + m b v b 0 = ( 5 ) ( v r ) + ( 0.015 ) ( 200 ) − 3 = 5 v r v r = − 0.6 m s The negative SIGN TELLS us the rifle moves in the opposite direction of the bullet

nciple of an electric motor is based on the magnetic effect of electric current. A current-carrying LOOP experiences a FORCE and rotates when placed in a magnetic FIELD.

mplification by stimulated emission of radiation (SASER) refers to a device that emits acoustic radiation.[1] It focuses sound waves in a way that they can serve as accurate and high-speed carriers of INFORMATION in many kinds of applications—similar to uses of laser light.[citation needed]Acoustic radiation (sound waves) can be emitted by using the process of sound amplification BASED on stimulated emissionof phonons. Sound (or lattice vibration) can be described by a phonon just as light can be considered as photons, and therefore one can state that SASER is the acoustic analogue of the laser.[citation needed]In a SASER device, a source (e.g., an electric field as a pump) produces sound waves (lattice vibrations, phonons) that travel through an active medium. In this active medium, a stimulated emission of phonons leads to amplification of the sound waves, RESULTING in a sound beam coming out of the device. The sound wave beams emitted from such DEVICES are highly coherent.The first successful SASERs were developed in 2009.I hope this answer is helpful to u...❤❤❤Keep Asking... ✌️✌️✌️✨✨✨If help u. MARK my answer as brainliest✨✨✨❤️❤️❤️Thank You❤️❤️❤️

arshana CHAKRA is a spinning, disk-like weapon, literally meaning "disk of auspicious vision," having 108 serrated edges USED by the Hindu god Vishnu. The Sudarshana Chakra is generally PORTRAYED on the right rear hand of the four hands of Vishnu, who also holds a shankha (conch SHELL), a Gada (mace) and a padma (lotus).

anical advantage is a measure of the FORCE amplification achieved by using a TOOL, mechanical device or machine system.2. The device preserves the input power and simply trades off forces against movement to OBTAIN a desired amplification in the output force. 3.The MODEL for this is the law of the lever.Machine components designed to manage forces and movement in this way are called mechanisms.4. An IDEAL mechanism transmits power without adding to or subtracting from it. This means the ideal mechanism does not include a power source, is frictionless, and is constructed from rigid bodies that do not deflect or wear. 5. The performance of a real system relative to this ideal is expressed in terms of efficiency factors that take into account departures from the ideal.I hope it helpful to you...........pleszz mark as the bainlist

, all the light is reflected back into the denser material in this casethe GLASS. This is called total internal REFLECTION. In order for total internal reflection to take PLACE: The rays of light MUST travel from a dense medium to a LESS dense medium.

ctrical ENERGY CHANGE into LIGHT ENERY

are PASS through

it does not DEPEND on the applied VOLTAGE. However, when a voltage is applied across an ohmic conductor, some current will FLOW through it. ... As most conductors have a positive temperature COEFFICIENT of resistance, the resistance of the conductor will increase according to the following relation.

toring FORCE is proportional to sinΘ and not Θ(Θ is the angular displacement). Therefore, this motion is not S.H.M. Thus, for small displacement, the RESTORING force is DIRECTLY proportional to the displacement and the PENDULUM performs linear S.H.M.

.E., BRITISH THERMAL UNIT

caused DUE to MOON and sun2)Revolution of moon around earth.3)Revolution of all PLANETS around SUN

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hammering the MAGNET strongly.(II) By HEATING a magnet strongly and keeping it in the east-west direction. HOPE this helps you^_^

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nce,R = 22ohms.Potential difference,V = 220VTime = 10 MINUTES = 600s.By OHMS law, we have V = IRI = V/RI= 220/22.........(V = 220V & R=22)I = 10AHence, CURRENT is 10 ampere Now, We KNOW that I = Q/t..........(Q= charges moved & t= time taken)Q= I*tQ= 10*600Q= 6000CHence, Charges moved is 6000C

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problem statement, all variables and given/known data How much power does a weightlifter expend when lifting a 50KG BARBELL a distance of 1.2m in a time interval of 1.5s? 2. Relevant equations Power=work done/time interval (in Newton meters per second or Watts) Work=Fd (in Newton meters or Joules) 3. The ATTEMPT at a solution Power = Fd/t = (m)(a)(d)/t = 50kg(9.8 m/s2)(1.2m)/1.5s = 392 Nm/s = 392 W This is how I solved the problem, but my professor said the correct answer is 40 Watts! Work = force x distance; work = 50 KG x 1.2 m, work = 60 Power = work /time; 60/1.5 = 40 WATT t

18km/hr. =18 × 5/18 mt/sec =5 mt/sectime = 1 min. =60 sec.distance = speed × time s = 5 × 60 = 300 mt.work done = Fscos60° =100 × 300 × 1/2 =15000m =15 km

is the CORRECT ANSWER

: 3 ohmExplanation: For DC CIRCUIT:R= 100÷25 = 4 ohmFor AC circuit:Z = V÷I = 100÷20 = 5 ohmZ=√(R^2 + Xl^2)25=16 + Xl^2Xl= 3 .

ate ❤it's so NICE to meet UH here's ua answer : 2.4 km/hr✔Solution:Let the speed of the stream be x km/hrThus, downward stream =(12+x)and upward stream =(12−x)suppose the distance TRAVELLED be y,GIVEN:y(12+x)=6 and y(12−x)=9On SOLVING these two equations we get:x= 2.4 km/hrHOPE I WAS A LE TO CLEAR UA DOUBTS see uh again bYe!!!!

iend..Here is your ANSWER.. The LONGER the length of STRING, the farther the pendulum FALLS hence the longer is the TIME period. The greater the amplitude, the farther pendulum falls and therefore, the longer the period.HOPE that it will help you