Explore topic-wise InterviewSolutions in .

measure in car is speedometer

measure in car is speedometer

a) speedometer is the correct answer

speedometer is the right answer.

speedometer measures the speed at which you are traveling (how fast), odometer measures the distance that you have travelled (how far)

thanks

TheSI unitof measure is coulombs per square meter, andpolarizationdensity is represented by avectorP.

Temperature coefficient of resistivitycan be defined as the rate of change of Resistivity per degree change in the temperature from a substance’s original temperature.

flow of charges in any circuit is known as current.it is denoted by Iunit of current is AMPERE(A)

An object is said to be in slow motion of it co ers less distance in given interval of time.An object is said to be in fast motion of it covers more distance in given interval of time.

Absolute zero is the lowest temperature possible.

This observation is purely in agreement with inertia and Newton's I law of motion. According to the law, in simple terms, any object wants to remain how it has been, whether in rest, or moving with some constant speed. In this case, the object is the dust. Dust particles were at rest on the carpet. However when you beat the carpet, you are forcing the dust to move along with the carpet. Due to the dust having inertia, it doesn't move, or rather, it resists motion. This is why dust comes out of a carpet when it is beaten with a stick.

This phenomenon is a simple law of inertia.Inertia is the property of body by virtue of which a body tends to remain in its position of rest or motion.So is this case in which when we beat the carpet with stick we set the carpet in motion in air while the dust particles due to their property of inertia tend to remain at rest (since initially they were at rest),and get seperated from the carpet.Now some of you may think that why doesn't the carpet shows the property of inertia in this case,it's because when we beat it with stick we apply external force on it while law of inertia holds good only in the absence of any external force.

Light waves from a moving source experience the Doppler effect to result in either a red shift or blue shift in the light's frequency. This is in a fashion similar to other sorts of waves such as sound waves. The major difference is that light waves do not require a medium for travel

Red light and Blue lights describe how light changes as objects in space (such as stars or galaxies) move closer or farther away from us. The concept is key to charting the universe's expansion.

Visible light is a spectrum of colors, which is clear to anyone who has looked at a rainbow. When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer. If an object moves closer, the light moves to the blue end of the spectrum, as its wavelengths get shorter.

formula for finding frequency

i want a single formula in which i can put all values given and using sign convention i get answer.give me a single formula

anirudh sharma thank you sooo muchbut tell me is it true and can i trust u blindly??

Since the question isn't clear and complete, I'd assume this to be the most correct answer.

can i trust uis answer correct or not

???

Yes. The answer is totally complete and works for all the 8 cases

thank u soo much

The dust is already settled inside the carpet. When you beat the carpet, the carpet moves back, but due to the law of inertia, the dust remains at the same place and starts to fall down.

Dust particles were at rest on the carpet. However when you beat the carpet, you are forcing the dust to move along with the carpet. Due to the dust having inertia, it doesn't move, or rather, it resists motion. This is why dust comes out of a carpet when it is beaten with a stick.

because when we beat a carpet the carpet comes in motion while the particles of dust are at rest thatswhy dust particles come out of carpet.

unit of frequency is Hertz(Hz)

The unit of frequency is Hertz

The SI unit of work is theJoule(J), which is defined as the work expended by a force of oneNewtonthrough a displacement of one metre.

In the International System of Units (SI), electric potential is expressed in units of joules per coulomb (i.e.,volts), and differences in potential energy are measured with a voltmeter

the unit of electric potential is volts

Electric potential, the amount ofworkneeded to move a unit charge from a reference point to a specific point against anelectric field. Typically, the reference point isEarth, although any point beyond the influence of theelectric field charge can be used.



READ MORE ON THIS TOPIC

electromagnetism: Electric fields and forces

The electric potential is another useful field. It provides an alternative to the electric field in electrostatics…

forces acting on a positivechargeqlocated between two plates, A and B, of an electric fieldE. Theelectric forceFexerted by the field on the positive charge isF=qE;to move the charge from plate A to plate B, an equal and opposite force (F′ = −qE) must then be applied. The workWdone in moving the positive charge through a distancedisW=F′d= −qEd.

Thepotential energyfor a positive charge increases when it moves against an electric field and decreases when it moves with the electric field; the opposite is true for a negative charge. Unless the unit charge crosses a changingmagnetic field, its potential at any given point does not depend on the path taken.

Although the concept of electric potential is useful in understandingelectricalphenomena, only differences in potential energy are measurable. If an electric field is defined as the force per unit charge, then byanalogyan electric potential can be thought of as the potential energy per unit charge. Therefore, the work done in moving a unit charge from one point to another (e.g., within anelectric circuit) is equal to the difference in potential energies at each point. In theInternational System of Units(SI), electric potential is expressed in units ofjoulespercoulomb(i.e.,volts), and differences in potential energy are measured with avoltmeter.

The unit of electrical potential is volt

The SI unit of capacitance is thefarad(symbol: F), named after the English physicist Michael Faraday.

Frequency =1.25beats/secondPeriod =0.8seconds/beat

Explanation:A frequency is usually expressed as a number of beats per second. The period is its inverse - seconds per beat.

Frequency = 75/60= 1.25 beats/secondPeriod =60/75 =0.8seconds/beat

thanks bro

a) v=vo + atb) s=so+vot + (1/2)at^2c) v^2=vo^2+2a(s-so) Like if you find it useful

a )v = u +atb) s =ut+1/2 at squarec)v square = u sqaure +2 as

C = Q/V[Farad] = [colomb/volt]

R = V/I[ohm] = [volt/amper]

I = dQ/dt[amper]=[colomb/time]

RC=(V/I)*(Q/V) --> [RC]=[volt/amper]*[colomb/volt]

[RC]=[volt*time/colomb]*[colomb/volt]=[time]hence unit of time constant is time

thank you

There are two ways to think about it. As you know, like magnetic poles repel each other and unlike poles attract. When you try to put them back together, the two poles of each magnet repel each other. The reason the magnet doesn't fall apart to begin with is that the strength of the material is strong enough to overcome the repulsion. If you cut a bar magnet crosswise, the two pieces will cheerfully attract each other because they are of opposite sign.

The other way of looking at it, a bit more obscure perhaps, is that there is an energy density associated with magnetic fields. It's a bit complicated but the essential point is that the total energy is proportional to the square of the magnetic field integrated over space. The total energy of the two halves put together is more than twice the total energy of the two halves separated far apart. So there will be a force pushing them apart.

plz explain this

the jumping velocity for the man to jump a height of 5m is of 10m

During Athletics meet, a high jumping athlete is provided either a cushion or heap of sand on the ground to fall upon.⇒This is done to prevent injury to the athlete when he falls down after making a high jump.⇒When he falls on a a soft landing site[either cushion or sand], then the jumper takes a longer time to come to stop.⇒The rate of change of momentum of the athlete is less due to which a smaller force will act on athlete.⇒ So, athlete does not get injury and cushion or sand reduces the momentum of athlete's . If the Athlete is made to fall on a hard surface like cement floor, then his momentum is reduced to zero in very less time and thus rate of change of momentum increases due to which large opposing force will act on athlete.which can lead to seriousinjury.

please give two line answer

becz speed is very high momentum is also very high and friction is very less

Fe= (-9.0 * 10^9) * (2.0 * 10^-6)(3.0 * 10^-6) / 0.40^2= -54 * 10^-3 / 1.6 * 10^-1= -0.3375 N

Fe= (-9.0 * 10^9) * (-5.0 * 10^-6)(3.0 * 10^-6) / 0.80^2= 135 * 10^-3 / 6.4 * 10^-1= -0.2109 N

a = -0.55N

Given, q₁ = 10⁻⁸ C q₂ = -10⁻⁸ C ∵ one charge is positive and other charge is negative ∴ electric field due to q1 and electric field due to q2 are in same direction. ∴ Electric field at A = electric field due to q₁ + electric field due to q₂ = Kq₁/(0.05)² + kq₂/(0.05)² = 9 × 10⁹ × 10⁻⁸/(0.05)² + 9 × 10⁹× 10⁻⁸/(0.05)² = 2 × 9 × 10/(1/20)²= 180 × 400 N/C = 72000 N/C

Electric field at B = electric field due to q₁ - electric field due to q₂ = kq₁/(0.05)² - kq₂/(3 × 0.05)² = 9 × 10⁹ × 10⁻⁸/(1/20)² - 9 × 10⁹ × 10⁻⁸/9 × (1/20)² = 36000 - 4000 = 32000 N/C

part 1

part 2

When you blow harder, more surrounding air gets mixed in with the stream of air from your mouth.The faster air moves, the lower pressure it has (Bernoulli's principle). So when you blow faster, your stream of air is lower pressure than the surrounding air. Thus the surrounding air fills in the stream. The surrounding air is obviously cooler than the air in your lungs. To test this - blow fast, but put your finger right on your lip - notice it's still quite warm because other air hasn't had a chance to mix in yet.To visual why this happens, imagine the stream of air coming from your mouth as a freeway with allredcars on it. Every on ramp to this freeway has a long line ofbluecars eager to get on. If traffic is moving slow, and the red cars (air from lungs) are very close together, not a lot of blue cars (surrounding air) can get on. But if the traffic is sparse and the flow quick, you'd see more of a mix of red and blue cars.

how u do it

Charges are additive in nature. The charge is a scalar quantity as it has only magnitude and no direction. The charge is just as other fundamental properties of the system likemass. The only difference betweenmassand charge is that charge is both positive and negative, whilemassis always positive.

we send you whatapp

give your whatapp number

The summer Olympics in September 1972

डायोड(diode) यह एक ऐसी युक्ति है । जिसमे विधुत धारा एक दिशा मे बहती है । द्विअग्र / द्वयाग्र एक वैद्युत युक्ति है। अधिकांशत: डायोड दो सिरों (अग्र) वाले होते हैं किन्तुताप-आयनिक डायोडमें दो अतिरिक्त सिरे भी होते हैं जिनसे हीटर जुड़ा होता है। डायोड कई तरह के होते हैं किन्तु इन सबकी प्रमुख विशेषता यह है कि यह एक दिशा मेंधाराको बहुत कमप्रतिरोधके बहने देते हैं जबकि दूसरी दिशा में धारा के विरुद्ध बहुत प्रतिरोध लगाते हैं। इनकी इसी विशेषता के कारण ये अन्य कार्यों के अलावाप्रत्यावर्ती धाराकोदिष्ट धाराके रूप में बदलने के लियेदिष्टकारीपरिपथों में प्रयोग किये जाते हैं। आजकल के परिपथों मेंअर्धचालक डायोड, अन्य डायोडों की तुलना में बहुत अधिक प्रयोग किये जाते हैं।

(a) centripetal force

(b) As an object moves in a circle, it is constantly changing its direction. Because of this direction change, you can be certain that an object undergoing circular motion is accelerating (evenifit is moving at constant speed). Without a net centripetal force, an object cannot travel in circular motion.

where A body moving circular motion it is said to be circulatory motion and then gravitational force is absent because the centre of the motion is on the. That the body is Hangouts

uniform circular motion

moon is called the natural satellite of the earth

Every natural satellite is identified with a mythical figure. ... Earth'smoon, the longest known of all, was given the name "Selene" by the Greeks and "Luna" by the Romans, each a goddess.