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Explanation:

Electric field lines reveal information about the DIRECTION (and the strength) of an electric field within a REGION of space. If the lines cross each other at a given location, then there must be two distinctly DIFFERENT values of electric field with their own individual direction at that given location. This could never be the case. Every single location in space has its own electric field strength and direction associated with it. CONSEQUENTLY, the lines representing the field cannot cross each other at any given location in space.

For example, in the image below, the lines are intersecting and hence there are two directions for Electric Field.

in the given question it is given to you velocity of particle at POINT A is 2m/s .distance between AB is 60m .

assume velocity of particle at point B is Vb and particle moving with ACCELERATION a.

use velocity-position relationship for path AB

this will be equation 1

For line BC it is given to you it take 3sec to reach point C and also known velocity at point C

apply velocity time relation for path BC.

it will be equation 2.

from equation one and two you can easily CALCULATE acceleration of particle.

Thank you.

Answer:

Explanation:

Experiment A:  2.16g of COPPER metal when treated with nitric ACID followed by ignition of the nitrate  gave 2.7 g of Cuo.

=> For the given process, we can write the chemical REACTION as:

Cu + 4HNO₃→Cu(NO₃)₂ + 2NO₂ + H₂O

2Cu(NO₃)₂ → 2CuO + 2NO₂ + O₂

=> Here, one mole of copper metal will form one mole of copper oxide as the END product.

atomic weight of Copper = 63g (reactant)

molecular weight of copper oxide = 79g (product)

∴ CuO/Cu = 79/63 = 1.25

CuO/Cu as per the detail given for Experiment A = 2.7/2.16 = 1.25

Experiment B:  1.15g of copper oxide upon reduction with  hydrogen gave 0.92 g of copper.

=> Chemical reaction for this process:

CuO+H₂→ Cu + H₂

=> In this reaction, Reactant is Copper oxide ( 63g) and product is Copper metal ( 79g)

∴ CuO/Cu = 79/63 = 1.25

According to experimental data, Cuo/Cu = 1.25

So, in both the CASE, ratio Cuo/Cu is remain same (1.25) which proves the the law of definite  proportion.

EXPLANATION:

m1=6

m2=600

u1=u2=0(before FIRING)

V1=?

v2=-3(RECOIL)

m1v1+m2v2=m1u1+m2v2

6v1+600*-3=6*0+600*0

6v1+-1800=0

6v1=1800

v1=1800÷6

v1=300

velocity of shell=300m/s

Answer: the correct answer is(B ) because,

we know that ANGLE between A and C is

90°.

So, A+B+C=180°

SO, B+C=180°-90°=90° -(1)

Given , C = B/2. -(2)

Substitute (2) in (1), we get

B + B/2 = 90°

(2B+B) = 2(90°)

3B = 180°

B = 180° / 3

.°. B = 60 °

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Answer:

PLANE mirror is your answer

I HOPE it will help you

Answer:

it is BLUE in the MORNING because atmosphere scatters every color EXCEPT blue and in night is BLACK as there is no sun and only one DIM source of light moon and we can see space

DISPLACEMENT lv/

displacement L /

displacement l/_______

TIME

Answer ⇒ Hence, option (b).  is correct.

Explanation ⇒

x = 12T - 3t²

At time t = 0 seconds,

x = 0

At time t = 5 seconds,

x = 12 × 5 - 3 × 5²

x = 60 - 75

∴ x = -15

Thus, DISTANCE is 15 m in negative direction of x - axis.

Hence, option (b).  is correct.

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IT is from north pole to south pole OUTSIDE the MAGNET and from south pole to north pole INSIDE the magnet.

its KNOWN as CYMBALS

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Answer:

The SPLIT ring in the electric motor ALSO KNOWN as a commutator reverses the direction of CURRENT flowing through the coil after every half ROTATION of the coil. Due to this the coil continues to rotate in the same direction,

Answer:

30cm

Explanation:

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EXPLANATION:

the ANSWER is XE 4f1 5d1 6s2

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Explanation:

in CUTTING TOOLS

bcz tools must HARDER than object to which u R working or gonna to cut

ANSWER:

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ANSWER:

I THINK LOW PASS FILTER is the answer

115 km/sec is RIGHT ANSWER

Answer:

Explanation:

• Erg is the CGS unit of energy when FORCE is given in DYNES and distance is expressed in CENTIMETERS.

• Joule is the SI unit of energy when the force is given in Newton while distance is expressed in meters.

• WORK DONE or energy= F*d= 107 * 10-2= 105 erg

• In short 1 Joule=105 erg

1 erg erg = 0.00000010 joules

ANSWER:

FORCE is said to be conservative if its work along a trajectory to go from a point A to a point B is equal to the difference U(A)−U(B) where U is a function called potential energy. This implies that if A=B then there is no CHANGE in potential energy. This fact is independent of the increase or not of the kinetic energy

Explanation:

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h=490m

u=0m/s

g=9.8m/s^2

h=ut+1/2gt^2

490=0+1/2*9.8*t^2

t^2=490/4.9=100

t=10

so REQUIRED TIME is 10 SECONDS.

Answer:

Lead time of scientific DEVELOPMENT refers to the time between when a certain idea or element was DISCOVERED and the time it came to serve its INTENDED purpose fully.

Explanation:

Most discoveries took time for them to work fully.The intellectuals BEHIND these ideas take time for them to fully reveal the true purpose of their discovery.This time between discovery and implementation is what we call lead time of scientific development.

EXAMPLES:

1821-1886_Electric heater(lead time 65yrs)

1922-1934_Television(12yrs)

ANSWER:

HYDRAULIC PRESS and hydraulic JACK.

ANSWER:

Hon'ble SHRI Yogi Adityanath

Chief MINISTER of Uttar PRADESH

The CURRENT Chief MINISTER of Himachal PRADESH is JAI Ram Thakur.
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Answer:

This means not acceleration it means decreasing acceleration i.e. RETARDATION .

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Answer:

66.026 sec

Explanation:

1 KM = 1000 m

total distance = 100 m + 1000 , = 1100 m

speed  = 60 km /hr = 60 X 5/18

                               = 16.66 m/s

time = distance / speed

 = 1100 / 16.66

 = 66.026 sec [ approx. ]

It's convex MIRROR.

A convex mirror ALWAYS forms a virtual, erect, and DIMINISHED image, IRRESPECTIVE of object's POSITION.

Answer:

Explanation:

Logic GATE circuits are designed to input and output only two types of signals: “high” (1) and “low” (0), as represented by a variable voltage: full power supply voltage for a “high” state and zero voltage for a “low” state. In a perfect world, all logic circuit signals would exist at these extreme voltage limits, and never deviate from them (i.e., less than full voltage for a “high,” or more than zero voltage for a “low”). However, in reality, logic signal voltage levels RARELY attain these perfect limits due to stray voltage drops in the transistor circuitry, and so we MUST understand the signal level limitations of gate circuits as they try to interpret signal voltages lying somewhere between full supply voltage and zero.

TTL gates operate on a nominal power supply voltage of 5 volts, +/- 0.25 volts. Ideally, a TTL “high” signal would be 5.00 volts exactly, and a TTL “low” signal 0.00 volts exactly. However, real TTL gate circuits cannot output such perfect voltage levels, and are designed to accept “high” and “low” signals deviating SUBSTANTIALLY from these ideal values. “Acceptable” input signal voltages range from 0 volts to 0.8 volts for a “low” logic state, and 2 volts to 5 volts for a “high” logic state. “Acceptable” output signal voltages (voltage levels guaranteed by the gate manufacturer over a specified range of load conditions) range from 0 volts to 0.5 volts for a “low” logic state, and 2.7 volts to 5 volts for a “high” logic state:

If a voltage signal ranging between 0.8 volts and 2 volts were to be sent into the input of a TTL gate, there would be no certain response from the gate. Such a signal would be considered uncertain, and no logic gate manufacturer would guarantee how their gate circuit would interpret such a signal.

Answer:

Explanation:

The stability of laser interferometer systems DEPENDS on the stability of the wavelength which, in turn, is dependent on the laser frequency and the fluctuations of the refractive index of the medium (typically air or vacuum), or how well the wavelength variations can be calibrated inline using an (absolute) refractometer. The stability of an optical encoder mainly depends on the stability of the scale material (e.g. invar, glass, steel, zerodur) or how well the thermal expansion can be predicted using INFORMATION from temperature sensors. Interferometers are traceable to SI standards by comparing the laser frequency with a reference laser, where SCALES are traceable to the SI standard by comparing the scale lines with a laser interferometer-based comparator which is ideally positioned in vacuum (Kunzman et al., 1993; Maeda, 2001; Holzapfel, 2008). Linearity has two aspects: coarse errors and interpolation errors. Laser interferometers do not have coarse errors, while for scales the coarse errors must be calibrated. The differences can be reduced by application of calibrated scales and inline error correction. Interpolation errors of laser interferometers are comparable and typically in the range of 1–20 nm. For high-end encoders and interferometers, these periodic deviations can be reduced to sub-nanometer level by inline calibration. The measuring range is easily scalable to several meters for interferometers WHEREAS for encoder systems the range is limited to the size at which the scales can be manufactured and mounted to a base with sufficient stability. In most machines with stapled linear actuators, it is easier to INTEGRATE a scale than an interferometer.

Answer:

Explanation:

porters place a round PIECE of cloth on their head when they CARRY heavy lods as the round piece of cloth increases the area on which the LOAD is placed. We know that when surface is more than PRESSURE is less. As a result, the pressure on their heads get reduced.

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Answer:

EXPLANATION:

Q1. A FISH sees the smiling face of a SCUBA diver through a bubble of AIR between them, as shown. Compared to the face of the diver, the image seen by the fish will be:

small and erect

smaller and inverted

larger and erect

larger and inverted

Answer: A. The image will be smaller and erect SINCE the air bubble act as a concave lens which always forms smaller and erect images.

Answer:

Gases have THREE characteristic properties:

(1) they are easy to COMPRESS

(2) they expand to FILL their containers

(3) they OCCUPY far more space than the liquids or solids from which they form.

Answer:

WORKING of straw , blowing of BALLOON. operating barometer, FLUSHING of toilet, DRAWING water from well

Answer:

CRICKET ball will have more momentum as...momentum is the product of MASS and VELOCITY and cricket ball is heavier than tennis ball......that's why cricket ball will have more momentum.

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ANSWER:

2 SECOND

EXPLANATION:

TIME to reach ground = √2h/g

= √2*20/10

=√4

=2 second

Answer:

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Answer:

2 SECONDS

Explanation:

Use v=u +at

V=2, u=-2, a=2 SUBSTITUTE to get t

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ANSWER:

Explanation: This is an example of the THIRD law of Newton.

Here as we can see that neither the mass or the magnitude of velocity has been changed. So now,

The change in MOMENTUM is ∆P=m∆V, as there is change in the velocity (sign) is 2V hence the change in momentum is 2mV.

The change in kinetic ENERGY is zero, as ∆K.E.=1/2[mV^2-mV^2]=0

Answer:

the AVERAGE speed of a body is the TOTAL DISTANCE TRAVELLED DIVIDED by the total time taken to cover this distance

a = v - u / t

a = 13 - 18 / 5

a = - 5/ 5

a = -1

HIERARCHICAL ANIMALS.

is the ANSWER.

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Linear motion - Linear motion is a one-dimensional motionalong a straight line, and can therefore be DESCRIBED mathematically using only one spatial dimension.

CIRCULAR Motion - circular motion is a movement of an object ALONG the circumference of a CIRCLE or rotation along a circular path. 

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ISRO BUILT India's first SATELLITE, Aryabhata, which was launched by the SOVIET Union on 19 April 1975. It was named after the mathematician Aryabhata.

ANSWER:

From the velocity-time GRAPHS, we can DETERMINE the displacement and the acceleration.

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Answer:

displacement is simply shortest DISTANCE between INITIAL and final POINT it does depend on path taken

Explanation:

for example a object is moved from CENTRE to a point A then takes a WHOLE round of circumference and again come on point A so the displacement is simply distance from centre of circle to point hence it has no matter with circumference or total path covered

Formally stated, Newton's third LAW is: For EVERY action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting OBJECTS. The size of the forces on the first object EQUALS the size of the force on the second object.
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