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EXPLANATION:

V = U + at

v = 0 + 2 × 10 = 20 m/s

hope it helps

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If the velocity-time graph is a straight LINE PARALLEL to the x-AXIS (which is the time axis), the SLOPE of the graph is zero.

ANSWER:

Yes in UNIFORM circular motion

Explanation:

When an object is in uniform circular motion the speed of the object is constant and is is ACCELERATED at every point so speed is also constant.

If this answer is helpful to you please like and mark brainliest.

ANSWER:

this is the EXPLANATION of p and n types a THERMOELECTRIC GENERATOR

ANSWER:

i HOPE this is CLEAR now

ANSWER:

MATE you QUESTION is INCOMPLETE

Answer:

yes RESISTIVITY increases with increase in resistance as resistivity directly proportional to resistance..

R=resistivity * length / AREA of cross SECTION..

C) A is DIMENSIONLESS ; B has dimensions M0L²T0, is the correct option.

This can be explained as:-

We know, that REFRACTIVE index is a DIMENSION less quantity.

Now, According to principal of homogeneity we know, that DIMENSIONS of quantities on the left is equal to dimensions of quantities in the right. So, A is dimensionless as refractive index.

Also, we know only like PHYSICAL quantities can be added or subtracted. So, Dimensions of A = Dimensions of B/lamda².

Now since A is dimensionless,

B/lamda² = M0L0T0

B/L² = M0L0T0

so,

B = M0L²T0

Cheers!

ANSWER:

EXPLANATION:

R=2F

here

R=-25

THEN F=12.5

Answer:

here's your solution

SOL: g = 10m/s² , TIME =1s , u = 0

By newton's first equation

v = u+at

v= 0 + (10×1)

v = 0 + 10

v = 10m/s

Now, By newton's second equation

s = UT + (½ at²)

s = (0×10) + (½ ×10×1)

s = 0 + (½ ×10)

s = 0 + 5

s = 5m

Ans. speed of ball = 10m/s . Height of table from ground = 5m

------- By Enrique

Answer:

Alloys are used in ELECTRICAL heating DEVICES rather than PURE metals. Give reason. ... Alloys are used in electrical heating devices rather than pure metals because the resistivity of an alloy is more than the resistivity of a pure METAL. Moreover alloy does not burn (or oxidize) easily even at higher TEMPERATURE.

HAWKING RADIATION is black-body radiation that is predicted to be RELEASED by black holes, due to quantum EFFECTS near the EVENT horizon.

Explanation:

In PHYSICS, PHYSICAL optics, or wave optics, is the branch of optics that studies interference, diffraction, polarization, and other phenomena for which the RAY APPROXIMATION of GEOMETRIC optics is not valid.

ANSWER:

both are DIMENSIONLESS

ANSWER:

V=IR

12÷16=I

3/4 A=I

HENCE 0.75A

ANSWER:

There are different types of MOTION: TRANSLATIONAL, rotational, periodic, and non periodic motion. A type of motion in which all parts of an object move the same DISTANCE in a given time is CALLED translational motion. Examples are vehicles moving on a road, a child going down a bird flying in the sky.

ANSWER:

It is the velocity which decides the direction of motion of a body. The ACCELERATION SIMPLY TELLS the rate of change of velocity. For example, when a body is thrown vertically UPWARDS, its direction of velocity is upwards, that is why the body goes upward, where as its acceleration is downwards.

EXPLANATION:

distance if scalar quantity that refers to how much ground an object has covered during its motion displacement is a VECTOR quantity that refers to how far out of place an object is it is the objects OVERALL CHANGE in POSITION

Answer:

EXPLANATION:

Answer:

Explanation:

A HIGHWAY motorist travels at a constant velocity of 45 km/h in a 30 km/h zone.

=> Suppose, motorist travels at a constant velocity 'V'.

V = 45km/h = 45*1000/3600 = 125 m/s    [because 1km = 1000m and 1 hr = 3600 s]

=> motorist TAKES 't' time to cover the distence 'd'.

∴ v = d/t

d = vt

d = 12.5*t ...(1)

=> The police officer accelerates uniformly from rest to OVERTAKE her. the acceleration of the police officer = 10 km/h^² = 10*1000/(3600)² = 0.00077 m/s²

=> now, we can calculate the time by using below equation:

d = ut + 1/2 at²

12.5t = 0 + 1/2 * 0.00077 * t²

t = 12.5*2 / 0.00077

t = 32467.5 s

t = 9.01 min

Thus, the police officer takes 9.01 min to  reach the motorist.

ANSWER:

NORMAL FORCE and WEIGHT

ANSWER:

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Answer:

VELOCITY will be zero at t=0

Explanation:

Substitute the following values into the equation,

1) x = 0

2) x = 12

3) x = 96

4) x = 480

The FIRST one shows that x = 0, therefore velocity will be zero at t = 0

Answer:

Explanation:

Geothermal energy is the heat that COMES from the sub-surface of the EARTH. It is contained in the rocks and fluids beneath the earth's crust and can be found as far down to the earth's hot MOLTEN ROCK, MAGMA

Explanation:

An intercontinental ballistic missile (ICBM) is a guided ballistic missile with a minimum range of 5,500 KILOMETRES (3,400 mi)[1] primarily designed for nuclear weapons delivery (delivering one or more thermonuclear warheads). Similarly, CONVENTIONAL, chemical, and biological weapons can also be delivered with varying effectiveness, but have never been DEPLOYED on ICBMs. Most modern designs support multiple independently targetable reentry vehicles (MIRVs), allowing a single missile to carry several warheads, each of which can strike a different target.

Early ICBMs had limited precision, which MADE them suitable for use only against the largest targets, such as cities. They were seen as a "safe" basing option, one that would keep the deterrent force close to home where it would be difficult to attack. Attacks against military targets (especially hardened ones) still demanded the use of a more precise, manned bomber. Second- and third-generation designs (such as the LGM-118 Peacekeeper) dramatically improved accuracy to the point where even the smallest point targets can be successfully attacked.

ICBMs are differentiated by having greater range and speed than other ballistic missiles: intermediate-range ballistic missiles (IRBMs), medium-range ballistic missiles (MRBMs), short-range ballistic missiles (SRBMs) and tactical ballistic missiles (TBMs). Short and medium-range ballistic missiles are known collectively as theatre ballistic missiles.

ANSWER:

i don't KNOW SORRY ....sorry REALLY sorry

Answer:

Acceleration of body A= -g (since, it is moving upward)

Acceleration of body B= g (since, it is moving downward)

Acceleration of A wrt B = acceleration of A- acceleration of B

                                       = -2g

SPEED of A at any time t= u-gt

Speed of B at any time t =gt

speed of A wrt to B = speed of A -speed of B = u-2gt

Height of A at any time t = UT- gt²/2

Height of B at any time t = h -ut

Seperation between the BODIES= h-ut-ut-gt²/2

    =h-2ut-gt²/2

Explanation:

CROWDING of ELECTRIC FIELD at a point means at that point there is strong electric field

ANSWER:

draw a HORSE carriage and REMOVE the bucket from the well

Answer:

Let the potential of each smaller drop be U, so

U = kq/r

now,

The NEW potential of the LARGER drop will be given as

U' = kq'/r'

here

q' = nq

and

as volume V' = nV

r'3 = nr3

or

r' = n1/3r

thus, we have

U' = knq / n1/3r

or

U' = (n/ n1/3).(kq/r)

thus,

U' = n2/3U

ANSWER:

R=L/A

a/q

if WIRE is strached to 2L then,

R'=2L/A

R'=2R

therefore ANS will be 200%

acceleration=v-u/t

=10-0/5

=2 m/s^2

and by DISTANCE FORMULA,

s=ut+1/2at^2

we GET s=25 m

Your ANSWER in PICTURES

Today's world is full of electronic GADGETS. We cannot STAT without them even for a DAY. They have become a PART of our life. If there would be no electronic gadgets then we would have to work a lot for the things which are very easy to do nowadays. Trains, mobiles and even other electronic gadgets help us a lot, without them life would not be as easy as we feel It today.

Hope it will help you

Please mark as Brainliest Answer

magnitude is the size of a MATHEMATICAL object, a property which DETERMINES whether the object is larger or smaller than other OBJECTS of the same kind.

Initial SPEED = u = 10 m/s
time duration to stop = t= 4 s
Final speed = v = 0
ACCELERATION , magnitude = (v-u)/t
a = -10/4 = - 2.5 m/s^2

Distance covered before HALTING
s = u t + 1/2 a t^2
s = 10 * 4 - 1/2 * 2.5 * 4^2 m
s = 20 m

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two-types of electric charges; positive and negative (commonly carried by PROTONS and electrons RESPECTIVELY). Like charges REPEL and unlike attract.

Other units: elementary charge; FARADAY; ampere-hour

SI unit: coulomb

Conserved?: yes

In SI base units: C = A s

Answer:

uniform or constant SPEED MEANS when an OBJECT covers equal distance in equal intervals of time

hope it helps

plz mark brainliest

Answer:

1hour= 60 × 60 = 3600 SEC

12 HOURS = 12 × 3600 = 43200 sec

30 min = 30 × 60 = 1800 sec

therfore , 43200 + 1800

45000 sec.

Remember 1 hour = 60 min & 1 min=60 sec

Regards..

ANSWER:

2/√2 = SEC 60 so i THINK 60 DEGREE will be the answer

ANSWER:VIRTUAL and erect

Explanation:

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ANSWER:

the OBJECT is on rest

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Heyamate!!

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No it can't be HAPPENED that a BODY have constant velocity but varying speed.

This is DUE to that

the constant velocity is MEANT by the constant magnitude and constant direction,

also the constant magnitude means constant speed.

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VECTOR and SCALER QUANTITY

10 useful EXAMPLES of atmospheric PRESSURE.

1.It MAINTAIN body pressure of our body

2.aeroplane easily run in atmosphere

3.

ANSWER:

Explanatithe QUESTION is not CLEAR