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A MACHINE cannot be 100 percent efficient because output of a machine is always less than INPUT. A CERTAIN amount of work DONE on a machine is lost to overcome friction and to LIFT some moving parts of the machine.Explanation:

Relative density is the density of a substance with RESPECT to pure water at 4°C.The density is water at 4° C is 1 g/cm^3.As the relative density of copper is 8.9, it MEANS that it's density is8.9 g/cm^3It can be CONVERTED to kg/m^31 g/cm^3 =0.001 kg/ (0.000001 m^3)So, 1 g/cm^3 = 1000 kg/m^3Thus, density is copper is8.9 × 1000 = 8900 kg/m^3.Thus, density of copper is8.9 g/cm^3 , or 8900 kg/m3

tion:HEY MATE WHERE IS THE DIAGRAM (FIGURE)TRY TO SEND COMPLETE QUESTION. OK

the ANSWER is in the attachment given below assume that R is the distance of a PT where we r writing the intensity of electric field...

what is this????

because there are no negetive chargesExplanation:

the KINETIC energy of 1 KG of oxygen at 300K is 1.356*106j

at LOW PRESSURE is RIGHT ANSWER

It means a force 5 kg will be able to lift the 50 kg stone with a rod of 6 feet length (BC+ BA). This is how a crow bar is USED. It is an oversimplified example of using a lever that GIVES substantial mechanical advantage. Hope this CLARIFIES the point.Explanation:please MARK as brainliest answerand follow me plz

an ANSWER i FOUND which in my OPINION MIGHT HELP you

(1) RESISTANCE of the coil R= p×L/A(2) GIVEN p= 42/1000000 ohm-cm(3) LENGTH of the wire in the coil = length of each turn× total number of turns(4)given mean diameter of the coil = 2.5 cm, HENCE radius = 1.25 cm and circumference 2×π×R=2×22/7×1.25=7.85 cm(5) length of the wire = circumference× No of turns = 7.85 × 100=785 cm(6)cross sectional area of the wire= π×d^2/4 = π×0.0648^2/4=3.297 cm^2(7)total resistance of the coil=42/1000000×785/3.29=0.01 Ohm

cal advantage of a class 3 LEVER is ALWAYS less than 1 because the load ARM is always longer than effort arm. This helps by reducing the APPLIED force(effort). So, it is a speed multiplier.

s of compounds with the same functional group and SIMILAR chemical properties in which differ from group.★ Homologous SERIES of alkynes:-The series of hydrocarbon compounds that contains atleast one triple BOND. This group of compounds is a homologous series with the GENERAL formula , where n is any integer greater than one.★ For example:- Ethyne = Propyne = BUTYNE =

ernational system of units is a system of measurement based on 7 BASE units : the metre ( length ) kilogram ( mass )second ( time )ampere ( electric current )kelvin ( temperature )mole ( quantity )CANDELA ( brightness )These base units can be used in COMBINATION with each other.I HOPE it will help you pls... mark my answer in brainlist.

By BIGBANG THEORY....EXPLANATION:

Edward lornez...MAY it HELP U ..but not SURE for the ans

A MERRY GO ROUND is an EXAMPLE of EQUILIBRIUM.

Explanation:Work = FORCE x distance Weight(force) = MASS x gravity Force = 100 x 10 = 1000NWork = 1000 x 5 = 5000Nm = 5000J

Hi...☺Here is your answer...✌=================================GIVEN:Volume of WATER , V= 5 Ltr = 5000 cm³{ 1 Ltr = 1000cm³}MASS of water , M = 5 kg = 5000 g{ 1 kg = 1000 g }Now,DENSITY,D = M/VD = 5000 g/ 5000 cm³D = 1 g/cm³Hence,The density of water is 1 g/cm³hope it helpsplzz mark my answer as the brainliestthank you

tion:counterintuitive. If SOMETHING is counterintuitive it MEANS it's the OPPOSITE of "intuitive" — in other words it's not easily understood in an instinctive, UNCONSCIOUS way

car MOVING from A to B with a constant speed of 60km/hr and RETURNS back to its INITIAL POINT with the constant speed of 40km/hr find the average speed of the car for its complete journeyAnswer:50km/hr

1.5 × 10-²³Explanation:ONE mole of CH4 CONTAINS 6.022×10²³ molecules.no. of moles = number of Molecules/avagadro's Number.=> 9.066 6.022 × 10²³≈ 3/2 × 10-²³= 1.5 × 10-²³...PLS MARK as BRAINLIEST

tion:hey guys I am so CONFUSED SORRY PLEASE MARKS as brainlist

plains train and auto mobile before every other FORMS of transportation humans travel on FOOT .........FORTUNATELY human begin learn to USE animal such as DONKEY horses and camel for transpiration from 4000 bc to 3000 bc in 3500 bc the wheel was invited in Iraq and the first whell was made from wood

4.80652938e-16 CEXPLANATION:PLEASE LIKE and FOLLOW me

The surface of MARS has an orange-reddish color because its SOIL has IRON oxide or RUST particles in itExplanation:The sky on Mars often appears pink or light orange because the dust in the soil is blown into Mars' THIN atmosphere by winds on Mars.hope this answer helps !!!!!

An ordinary (acoustic) guitar makes SOUND entirely by vibration. ... As you pluck the STRINGS, the wooden body of the guitar vibrates, the air inside the body vibrates too, and it's the VIBRATIONS of the wooden body and the air that AMPLIFY the string sound so you can HEAR it.

a TRANSFORMER can't step up d.c. voltage Explanation:When a d.c. voltage source is applied across the primary of the transformer the current in the primary could remains constant. HENCE there is no change in the magnetic FLUX LINKED with the secondary cook is zero . THUS a transformer can't step up d.c. voltage

^-2So 4TH option is correct Q6. diameter is 14cm therefore radius will be 7cm Now finding distance Displacement will be zero as it comes back to its original position so option 4 is correct hope it HELPS... if U LIKE it plz don't FORGET to mark me as Brainlist

rice wheat BARLEY EXPLANATION:MARK it as branliest answer

an ammeter is a measuring device use to measure the electric CURRENT in a CIRCUIT a voltmeter is CONNECTED in parallel with a device to measure a current