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Efficiency of heat engine: The efficiency of a heat engine is DEFINED as the ratio of the NET work done by the engine in one cycle to the amount of heat absorbed by the working substance from the source. Efficiency of a heat engine is ALWAYS less than UNITY. Clearly, when Q2 = 0, η= 1 or 100%.

There are eight PLANETS in the SOLAR system: Mercury, VENUS, Earth, Mars, Jupiter, Saturn, Uranus, and NEPTUNE.

in the TUBE starts to vibrate with the same FREQUENCY as your lips or the reed. Resonance increases the amplitude of the vibrations, which can FORM standing waves in the tube. The length of the AIR column determines the resonant FREQUENCIES. ... Open and closed ends reflect waves differently.

The social benefits can also lead to academic benefits. Physical activity is shown to lead to better academic performance, and when your team is PERFORMING better, on the court and in the classroom, it ADDS an incentive for the individual players to do The social benefits can also lead to academic benefits. Physical activity is shown to lead to better academic performance, and when your team is performing better, on the court and in the classroom, it adds an incentive for the individual players to do Benefits of School-Sports are a crucial part of a student's growth and development. They help in the development of mental health and physical fitness of the body. Through participation in sports and games, a student gains VARIOUS skills, EXPERIENCE and CONFIDENCE that are helpful for developing their personality.

The NEGATIVE value for voltage means a positive charge would be attracted from a LARGER DISTANCE, since the POTENTIAL is lower (more negative) than at larger distances. Conversely, a negative charge would be repelled, as expected.Explanation: pls MAKE me brainlist

because PLUTO is very SMALL and FAR planetExplanation:as I KNOW

Attempts were made to bring CHANGES to the existing system of EDUCATION in India. He sent the “Wood's despatch” to the Governor General Lord Dalhousie. ... Provisions were made to introduce SYSTEMATIC education from the primary to the UNIVERSITY LEVEL. To teach students in primary schools in vernacular languages also.

Diameter of Earth moon= 3,474.2 kmDiameter of earth= 12,742kmHow big Jupiter is in compareDiameter of SUN= Jupiter, the largest planet in the solar system, has a diameter of about 87,000 miles. (And even Jupiter is tiny COMPARED to the Sun, which is roughly TEN times WIDER than Jupiter, at about 864,000 miles.) Explanation:HOPE it help mark as Brainlist

3.the ozone LAYER protect us from the U.V rays to won't ENTRE on to the earth.theU.V rays was very dangerous

Characteristics Of Sound WAVES: Amplitude, FREQUENCY, WAVELENGTH And Timbre.Explanation:MARK me as barinliest

The ozone LAYER is like the Earth's sunscreen, as it absorbs some of the sun's RADIATION hitting our PLANET. It is good at TRAPPING ULTRAVIOLET rays (UV rays) that can penetrate living organisms' cells and damage vital DNA moleculesExplanation:Hope it is helpful

I will a SWER NEXT TIME EXPLANATION: kkkkkkkkkkkk

adestand the QUESTION

D. Has all the above FEATURES

Harmonics. The simplest normal mode, where the string vibrates in one loop, is LABELED N = 1 and is called the fundamental mode or the first harmonic. The second mode (n = 2), where the string vibrates in two LOOPS, is called the second harmonic. The nth harmonic CONSISTS of n vibrating loops.Explanation:MARK me as barinliest

10m/sExplanation:V²-u²=2aswhere INITIAL velocity(U)=0V²=2asV²=2x10x5V²=100V=10m/sthe ball acquire the velocity of 10m/s just before it reaches the groundHope it is HELPFUL

tion:The stratospheric OZONE layer is Earth's “SUNSCREEN” – protecting LIVING things from too much ultraviolet RADIATION from the sun. The emission of ozone depleting substances has been damaging the ozone layer.hope it HELPS you friend

tion:Since charges tend not to move easily in nonmetallic solids it's possible to have "islands" of charge in glass, ceramics, and plastics. The latin word for island is insula, which is the origin of the word INSULATOR. In contrast, charges in metallic solids tend to move easily — as if someone or something was leading them. The latin prefix con or com MEANS "with". A PERSON you have bread with is a companion. (The latin word for bread is panis.) To take something with you on the road is to convey it. (The latin word for road is VIA.) The person you travel with who LEADS the way or provides safe passage is a conductor. (The latin word for leader is ductor.) A material that provides safe passage for electric charges is a conductor.

The total ENERGY of a system is the sum of kinetic and gravitational potential energy, and this total energy is conserved in ORBITAL motion.

According to the PARALLELOGRAM law of VECTOR addition if two vectors act along two adjacent sides of a parallelogram(having magnitude equal to the LENGTH of the sides) both pointing away from the common vertex, then the resultant is represented by the DIAGONAL of the parallelogram passing through the same common vertex ...EXPLANATION:

velocity I ALSO have a GREAT day with friend shweta the LCM of the FOLLOWING endangered speciesExplanation:it is very IMPORTANT to have velocity

私は怒っていませんが、私の脳はただひび割れていますh

question we are given the initial velocity (u) as 30 m/s and it is said in question that, suddenly a DOG comes on the way of car and driver applies the brakes and car STOPS so, final velocity (v) will be 0 m/s and time interval (t) is 4 second and it is also given that,the total mass (m) of the car is 1000 kg. We are asked to find the force exerted on car by brakes.To solve this numerical first we need to find the acceleration (a) of the car and after FINDING the acceleration we can find the force exerted on car by brakes by USING Newton's second law. So,let's do it :

ree resistors are CONNECTED one after the other in an electric circuit is called SERIES combinationin this combination the CURRENT remains same the VOLTAGE GETS divided

4.72/3 cmExplanation:COM= (m,R, + m,,r,,+m,,,r,,,)÷ (m, +m,,+m,,,)

Total ~Energy = 1 2 m V 2 + 1 2 k x 2 = 1 2 k x f 2 = constant . From the energy conservation, we can estimate that, by the TIME the BLOCK reaches x=0 position, its SPEED will be v(x=0)=√kmxf v ( x = 0 ) = k m x f .

v = 10√10 m/sExplanation:Given :A BALL is dropped from a height of 50 mTo find :the velocity of the ball just before it REACHES the groundSolution :As the ball is dropped, the initial velocity of the ball is 0 m/s  The distance the ball has travelled from height of 50 m to the ground is 50 m  S = 50 mUsing third equation of motion, v² - u² = 2aswherev denotes final VELOCITYU denotes initial velocitya denotes acceleration of the objects denotes the distance covered by the OBJECTIN this case, a = G = 10 m/s²Substitute the values, v² - 0² = 2(10)(50) v² = 1000 v = √1000 v = 10√10 m/sTherefore, the velocity of the ball just before it reaches the ground is 10√10 m/sWe calculated the velocity of the ball without using it's mass as in the expression we used, there is no term of mass. So, we do not require the value of mass to find the velocity.

General Lord William BentinckThe Bengal Sati Regulation which banned the Sati practice in all jurisdictions of BRITISH India was PASSED on December 4, 1829 by the then Governor-General Lord William Bentinck. The regulation described the practice of Sati as REVOLTING to the feelings of human natureExplanation:PLS mark as BRAINLIEST

When the bridge is at balance condition the  across the ARM AB and the point a, d and e are EQUAL. The phasor sum of the voltage across the ARMS ac and DE will give rise the voltage drops across the arm ab.Explanation:HOPE IT HELPES U

Bulk MODULUS is a modulus associated with a volume STRAIN, when a volume is compressed. The formula for bulk modulus is bulk modulus = - ( PRESSURE applied / FRACTIONAL change in volume).

This PHENOMENON is known as "DESTRUCTIVE Interference". When light waves of OPPOSITE phases and equal amplitudes meet at a point, they cancel each other and HENCE, produce darkness.x(t)=Asin(ωt)+Asin(ωt+π)=0

bulk modulus is the ratio of the change in PRESSURE to the fractional volume compression. actually, bulk elastic PROPERTIES of a material is used to determine how MUCH it will compress under a given amount of external pressure. from above definition, bulk modulus, K = ∆P/(∆V/V)EXPLANATION:I HOPE YOU GET SOME HELP THIS ANS

its is because acid conduct ELECTRICITY can conduct though the electricity of the boks EXPLANATION:THANKS

conductivity of a bad CONDUCTOR is DETERMINED by LEE's DISC METHOD.

tion:Given,VELOCITY=vangle=θThe image will move towards the PLANE mirror with - v velocity . The - SIGN indicates that the image moves in opposite direction of the object. Well, if you ask the velocity of object relative to the object then it would be - 2v. It means that the object would experience that the image is moving towards it with velocity 2v. SINCE the object is moving horizontal direction so the component of the velocity is 2vcosθ