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Energy consumed= power * time

(a) 100*2 = 200 wh(b) 1200*10/60 = 200 wh(c) 25*8 = 200 wh(d) 250*1 = 250 wh

Therefore,(d) is correct option

Energy=Power×time250a) 100×2=200kwh b)1200×60÷10= 7200kwhc) 25×8= 200kwhd) 250×1= 250kwhAns) b 1200 Watt toaster in 10 minutes

option (a) is correct.

It was originally defined as 550 foot-pounds per second (ft-lb/s). A power level of 1hpis approximatelyequivalentto 746 watt s (W) or 0.746 kilowatt s (kW). To convert fromhorsepowerto watts, multiply by 746

current will be maximum when (100t+/3)=/2 i.e t=1/600 secoonds.

Answer given is 1/200 seconds...

For minimum current, Resistance has to be maximum. So they must be connected in series. Total Resistance = 10+15 = 25 ohmCurrent, I = 12/25 = 0.48 Amp

2)For maximum current, Resistance has to be minimum. So they must be connected in parallel. Total Resistance =10*15/10+15 = 6 ohmCurrent, I = 12/6 = 2.0 Amp

Total resistance is = 1.9+0.9+1 = 3.8 Ω

so current = (2+2)/3.8 = 4/3.8 = 20/19

now P.D around A = i*r1 = 20/19*(1.9) = 2v

option 1

Usually frequency is measured in the hertz unit, named in honor of the 19th-century German physicistHeinrich Rudolf Hertz. The hertz measurement, abbreviated Hz, is the number of waves that pass by per second.

frequency

frequency

volume of sound is measured and decibal

please send the complete question (what is the resistance in the question)

question is complete

Let the voltage of cell be x.In Series, voltage= 2xIn Parallel,voltage= xLet Internal resistance of each be yIn series, effective internal resistance= 2yIn parallel, eff. internal resistance= y/2Now currentin both the cases

In series, 2x/(2y+4)In parallel, (x)/{(y/2)+4}Both the currents are equal. So, Just check by putting the different resistances in options

92)The ratio of totalresistanceto individualresistanceis the same ratio as individual (branch)currentto totalcurrent. This is known as thecurrent dividerformula and it is a short-cut method for determining branch currents in aparallelcircuit when the totalcurrentis known.

The liquid A

Momentumis a vector quantity that is the product of the mass and the velocity of an object or particle. The standardunitofmomentummagnitude is the kilogram-meter per second (kg. · m/s or kg.

Force is one which changes or tend to change the state of rest or of uniform motionForce is vector quantity as it consists of magnitude and direction.It's SI unit is newton (N)

inclined towards the west from the vertical.

The drops which are falling a little ahead of the current position of the woman, will fall on her, because she moves in that direction.

relative velocity of the rain drops wrt cyclist = velocity of woman - velocity of rain

the magnitude of relative velocity the rain drops wrt woman = √(12² + 35²) = 37 m/s

direction of relative velocity of the rain drops = = tan⁻¹ (12/35) = 18.92 deg. from the vertical.

So the cyclist should hold the umbrella at 18.92 deg to the vertical in the forward direction.

Apply voltage divider rule

V=12*(230/240)

V=11.5 volts

A is the answer

27% is the correct answer

AnswerOpti onA

In the given figure .. applying force balance along x direct

T1cos45° = T2cos30°=> T1 = T2*(√3/2)/(1/√2) = √(3/2)T2.

and along y direction , it is.

mg = T1sin(45°) +T2sin(30°)=> mg = T1/√2 + T2/2

now putting the value of T1 in the 2nd equation.

=> √3T2/√2 +T2/2 = mg => T2(√6+1) = 2mg => T2 = 2mg/(√6+1)

and hence T1 = (√3/√2)*(2mg/(√6+1)) => T1 = √6mg/(√6+1).

Answer:

1 hr

Explanation:

A swimmer reaches the other Bank of a flowing river exactly opposite to starting point if he was swimming at 2 km / he while maintaining 150° with the flow then time taken by him to cross the river 1 km wide is​

Swimming at 2 km/hr

Angle = 150°

Horizontal Speed = 2 * Cos150° = 2 * (-√3/2) = -√3 km /hr

Compensated the flow ( as he reaches just opposite )

Vertical speed = 2 Sin 150° = 2 * (1/2) = 1 km/Hr

Resultant Speed = 1 km/hr

River Width = 1 km

Time taken = 1/1 = 1 hr

Correct Ans of this question:-

Time taken = 1hr

km/hr

swimming ar 2 km/he

Angle=50Horizontal speed =2* cos15°= 2*(-√3/2)= -√3km/hrcompensated the flow (as he reaches just opposite) vertical speed =2sin=150°=2 *(1/2)=1

Resultant speed =1kmRiver width = 1kmTime taken=1/1=1he

given,

speed of man, Vm= 3km/hr

speed of river, Vr= 2km/hr

angle which the man makes with the direction of motion of river = 120

The resultant velocity of man can be calculated by the parallelogram law of vectors as,

angle between Vrand VR

now time required to cross the river = OB/VR

in trianle ABO, angleAOB = 90o- 79o= 11o

so, OB = AO/cos11o= 0.5/0.981 = 0.509

sotime required = 0.509/2.6 = 0.196hr = 0.196x60x60 = 705.6s

Now the point where he will reach is B,andthe distance of B from A = AB = AOtan11 = 0.097km= 0.097x1000= 97m

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Wrong answer

AS-1 is our most effective heavy oil stimulation fluid. We have achieved remarkable results with this product and have been continually improving it since its creation in 1994. If this product does not work in a heavy oil application then it is likely that nothing will!AS-1 is a specially formulated blend of organic solvents, penetrants, and dispersants for prevention and dissolution of asphaltene and paraffin deposits. AS-1 is used for a variety of applications where these troublesome deposits cause plugging and reduced production. This multifunctional product provides superior deposit and sludge control compared to treatment

Fluid frictiondescribes thefrictionbetween layers of a viscousfluidthat are moving relative to each other. Lubricatedfrictionis a case offluid frictionwhere a lubricantfluidseparates two solid surfaces

the answer provided is correct.

Fluid frictionisdefinedas viscosity. Basically, it is thefrictionexerted by one layer to another layer of same or differentfluid. Gases and liquids, both arefluids. But gases move faster from one place to another because of their less viscosity orfluid ionizing the fluid can be one option as the similar charge will defenitely help us to some extenct to minimize friction but isn’t a practical solution.

On practical basis try to reduce the viscosity(the forces that fight against the free flow of liquid) of fluid by chemical means or by diluting it or by varying it’s temperature depending upon how your fluid reacts to those changes.

Influiddynamics, Bernoulli'sprinciple statesthat anincreasein thespeedof afluidoccurssimultaneouslywith adecreaseinpressureor adecreasein thefluid's potential energy.

b-bernoullis principle

The phenomenon of splitting of white light into lights of seven colours is called dispersion.

no

The wires are highly conducting are made up mainly of copper. The Filament is made up of Tungsten. Well, a material glows when an electric current is passed because it heats up. This heating is directly proportional to the resistance offered to the current. Since copper is a highly conducting metal (= Low resistance), it doesn't heat up to the point of melting of wire. But Tungsten offers more Resistance thus it heats up Glows. Also, Tungsten is chosen becaues it has the highest boiling point of all metals thus it won't melt away even when heated by an electric current. But there is danger of snapping of the wire and thus the bulb won't work if the thin tungsten wire has broken, then we say that the Bulb has Fused!

The electrons in a conductor start moving with drift velocity when an electric field is applied.Current is not just one electron flowing from one end of a conductor to another. It is the overall flow of electrons throughout the conductor.When an electric field is applied, electrons at all parts of the conductor start drifting. The electrons just near the negative terminal of the battery drifts, the electrons at the middle of the conductor drifts and the electrons near the positive end of the conductor also drifts. So, even if the drift velocity is the order of few cm/s, the current flows at the velocity of the propagation of the electric field, which is the velocity of light.This is why, when you switch ON the bulb, we observe that the bulb glows instantly.

इसकी क्षमता 1/20D होगीपॉवर=1/फोकस

According to the Kelper's law of planetary motionv1/v2 = r2/r1

so,maximum speed = vmthan,V0/ Vm= R/rVm = V0r/R

moon is continuously revolving around earth without falling towards it because the forces of speed and gravity keep the Moon in a constant orbit around Earth. It is also because of the gravitational attraction of earth provides the necessary centripetal force to the moon for its orbital motion around the earth. Due to which the moon is revolving around'the earth. it was the mechanism given by Newton at your level it is enough if you want to discuss more you can contact me

(a) This is a series connection and effective resistance will be higher. Therefore brightness will be less.(b) This is a parallel connection and effective resistance is less. The brightness will be more.

Aconcavemirror is used in torch lights. The light rays from a source placed on the focus of a concavemirror are reflected in such a way that the reflected rays are strong, straight and parallel.