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When an object is STATIONARY, the line on the graph is horizontal. When an object is moving at a steadyspeed, the line on the graph is straight, but sloped. Thediagram shows some typical LINES on a distance-timegraph. Note that the steeper the line, the GREATER THESPEED of the object.
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When a parallel beam of light hit on the surface of a lens, REFRACTION of the light occurs and it forms an image. In order to produce a clear and perfect image, focal point of all rays in a beam of light should be same. In a normal lens, the light rays do not CONVERGE on the same point and makes the image to appear blurred. This intrinsic DEFECT produced is known as 'spherical aberration'.

Ways to minimize the spherical aberration:

• By using stops i.e. by placing an opaque sheet with a hole, so that light is focused on the center of the lens and the aperture is reduced.
• By using a pair of convex lenses that are placed apart from each other in a distance equal to difference in their focal lengths.

This is solution

First 3 R arrange in parallel then arrange in series solve it in the WAY we USE to solve other questions RELATED to this

Given in the QUESTION :-

Angular acceleration , α = 0.20

Mass M = 120 G or 0.12 kg

Edge a = 5.0 cm or 0.05 m

Moment of inertia of PLATE when LINE PASSING by centre and parallel to the edge

Now, Torque (plate)

T = Iα

=

⇒ 0.12 × 0.05² × (0.20/12)

⇒ 0.01 × 0.05 × 0.01

⇒ 0.5 x 10⁻⁵ N.m

Hope it Helps :-)

Given in the question :-

Angular acceleration , α = 0.20

Mass M = 120 g or 0.12 kg

Edge a = 5.0 cm or 0.05 m

Moment of INERTIA of PLATE when LINE passing by centre and parallel to the edge

I =Ma²/12

Moment of Inertia (Plate edge)

=Ma²/3

Now putting the values,

=(0.12 × 0.05 × 0.05)/3

= 0.0001 kg.m²

Torque (plate) = I'α

=0.0001 × 0.20

=2 x 10⁻⁵ N.m

Hope it Helps :-)

Given in the question .

Total number of FORCE acting on the block is three.

Weight= MG

Friction= F

Normal force= R

Refer to the Attachment

Here, Force mg acting on the two component i.e mg. cosθ and mg.sinθ

Now,

∵ R and mg.cosθ passing by the CUBE CENTRE, hence no TORQUE will be working, only torque is produced by mg.sinθ

Thertefore,

i = F× r

i = mgsinθ × (a/2) (r = a/2)

i =

Hope it Helps :-)

If the mass of an object is m and it has a velocity V, then themomentum of the object is defined to be its mass multiplied by its velocity. MOMENTUM has both magnitude and direction and THUS is a vector quantity. Theunits of momentum are kg m s−1 or NEWTON seconds, N s.

Anomalous expansion of water help the aquatic animal in WINTER because when the winter comes the temp. starts to decrase and this could kill all the aquatic animals in water but the WATERS special property of EXPANTION lets the water to freeze on the top and keeps the water in lower LEVEL as LIQUID.

GIVE CONDITIONS ⇒

Mass of the SALT Solution = 100 G.

Mass of the Slat = 20 g.

∴ Mass Concentration of the Salt = Mass of the Salt/Mass of the Solution

= 20/100

= 0.2

∴ % Mass Concentration of the Salt = 0.2 × 100

= 20 %

Hope it helps.

Omega = V/r
THEREFORE 10 = v/20
= v = 10 * 20 = 200 m/s

Thanks for asking the question!

ANSWER::

Two friends A and B (each weighing 40 kg) are sitting on a frictionless PLATFORM some distance d apart. A rolls a ball of mass 4 kg on the platform towards B which B catches. Then B rolls the ball towards A and A catches it. The ball keeps on moving back and forth between A and B. The ball has a fixed speed of 5 m/s on the platform.

(a) CASE - 1 => Total momentum of the man A and the ball will remain constant

Therefore ,

0 = 4 x 5 - 40 x v

v = 0.5 m/s towards left

(b) CASE - 2 => When B catches the ball , the momentum between the B and the ball will remain constant.

4 x 5 = 44v

v = 20/44 m/s

CASE - 3 => When B throws the ball , then applying LAW of Conservation of Linear Momentum (L.C.L.M.)

44 x (20/44) = -4 x 5 + 40 x v

20 = -20 + 40v

v = 40/40 = 1 m/s towards right

CASE - 4 => When A catches the ball , then applying L.C.L.M.

-4 x 5 + (-0.5) x 40 = -44 v

-20 - 20 = -44 v

v = 10/11 m/s towards left

(c) CASE - 5 => When A throws the ball , then applying L.C.L.M.

44 x (10/11) = 4 x 5 - 40 x v

v = 60/40

v = 3/2 m/s towards left

CASE - 6 => When B receives the ball , then applying L.C.L.M.

40 x 1 + 4 x 5 = 44 x v

v = 60/44

v = 15/11 m/s towards right

CASE - 7 => When B throws the ball , then applying L.C.L.M.

44 x (66/44) = -4 x 5 + 40 x v

v = 80/40

v = 2 m/s towards right

CASE - 8 => When A catches the ball , then applying L.C.L.M.

-4 x 5 -40 x (3/2) = -44 v

v = 80/44

v = 20/11 m/s towards left

Similarly after 5 round trips

Velocity of A will be 50/11 and velocity of B will be 5 m/s

(d) Since after 6th round trip , the velocity of A is 60/11 m/s > 5 m/s .

So , it can't catch the ball .

So , it can only roll the ball six.

(e) LET the ball and the body A at the initial POSITION be at origin.

Centre of mass of the system =( 40 x 0 + 4 x 0 + 40 x d ) / (40 + 40 + 4 )

= 40d / 84

= 10d/11

Hope it helps!

I have TRIED my level BEST if there's any MISTAKE plzzz UPDATE me

II) If both bulbs are connected in parallel then the total POWER consumption will be 120W.
Which of the above STATEMENTS is/are CORRECT REGARDING the circuit?

ANSWER:m1.a/ m2

Explanation: let's MAKE the MOMENTUM conserved. Take distance MOVED by m2 be b.

m1v1=m2v2

m1.a/t=m2.b/t

m1.a=m2.b

m1.a/m2=b

ANSWER: it is not accelerating

Explanation: an object having balanced cannot be accelerating, it MEANS either it is in rest or in motion with constant VELOCITY.

No of valane ELECTRON is 2 as it BELONGS to alkaline earth METAL and its valamcy is 2 its a metal

Take mass of MAN as 'M'.

Assuming all energy is used to do WORK, USE G.P.E = mgh.

Potential energy = (M+50) x 9.8 x 40

So G.P.E = 392M +19600

Other EQUATION; Power = W/t

P = (392M + 19600)/25

so,

1568 x 25 = 392M + 19600

392M = 39200 - 19600

Mass 'M' = 19600/392 = 50KG.

The initial velocity of BULLET is 300m/s.
Final velocity=0
Distance covered=3cm=0.03m

So,using the FORMULA v^2=u^2-2as
We have
0=(300)^2-2a(0.03)
Or 0.06a=90000
=> a=90000/0.06
=> a= 1500000m/s^2.

So force =mass times ACCELERATION
=(0.02kg)(1500000)
=30000N

Answer:

EXPLANATION:power of the lens= +1.5D

Using P=100/f

f=100/p

f=100/1.5

=1000/15= 66.67m

As the focal LENGTH is POSITIVE, it is CONVEX lens.

Hence, It is a CONVERGING lens.

Answer ⇒ Chemical Energy.

Explanation ⇒ When we used to run the bicycle up on the incline plane the Potential energy of the bicycle and mine COMES from the Chemical Energy which is converted into the mechanical energy. The mechanical energy is used to increase the Potential energy of the bicycle.

The food which we eat used to PROVIDE the energy which is stored in our body in the form of the glucose or glycogen.

All the WORK which we used to perform daily are DONE by the help of the Chemical energy only.

In the given case also the energy to push the bicycle is the chemical energy which is stored in our body.

Hope it helps.

The WORK DONE by the 'weight of the SUITCASE' on the suitcase ISZERO

Universal law of GRAVITATION :

The force of attraction between TWO particles is directly proportional to the product of their masses and inversely proportional to the square of the distance between these particles are bodies.

Importance of universal law of gravitation :

1. All the planets revolve around the sun DUE to GRAVITATIONAL force between the sun and the planets.

2. Tides in Ocean are FORMED due to gravitational force between the moon and the water in oceans.

3. Artificial satellites revolve around the Earth due to the gravitational force between the Earth and the satellite.

Most astronomy POSITIONS REQUIRE a Ph.D. in the field of astronomy, which usually takes 5-7 years to complete. These programs are likely to contain courses in astrophysics, stellar and planetary physics, galaxies, cosmology, interstellar medium and optics. Mathematics and computer science are also EMPHASIZED.

Some cookers do not have a domed lid, so it is dangerously easy to fill the cooker almost to the UNDERSIDE of the lid. The contents can boil up, and in this case they appear to have done so just ENOUGH to block the pressure regulator PIPE. The pressure then BUILT up further until the safety PLUG blew out, which rapidly decompressed the contents.

The designated (NOMINAL) length of a tape, as STATED by the manufacturer, rarely equals to the true distance. The difference between the true distance and the designated length is known as error due to standard length (of tape). Thus, the CORRECTION for ABSOLUTE length of tape,

CD = true length – nominal length

You can't make them by mixing any other colors. Orange, green and purple are the SECONDARY colors. A secondary color is made by mixing two PRIMARY colors. For INSTANCE, if you mix red and yellow, you get orange.

0.1 / 5.7 = 0.01754385

s=vt is FORMULAE SY

2as=vf2-vi2

If you have a fixed VOLUME of GAS, then the PRESSURE and temperature of the gas will be directly PROPORTIONAL to one another. Record the pressure as you vary the temperature, then plot your data. You should get a straight line graph. Now extrapolate this line back to zero pressure; the temperature that this cuts the axis at will be absolute zero in your UNITS of temperature measurement (for example, if you measure in °C, you should get -273.15°C).

1) A convex mirror, diverging mirror, or fish eye mirror is a CURVED mirror in which the reflective surface BULGES toward the light source. Convex mirrors reflect light outwards, THEREFORE they are not used to focus light. ... The image is smaller than the object, but GETS larger as the object approaches the mirror.
2)A concave mirror is a mirror that is curved inward in the middle. It might help you to remember this if you think that when you look in a concave mirror, it looks like you are looking into a cave. The EQUATION we use when dealing with concave mirrors is called the mirror equation

9 × 10^7 N of FORCE between two charges each of 20 MILLI coulomb SEPARATED by a DISTANCE of 20cm in air.

KINETIC ENERGY: energy which a body possesses by virtue of being in motion

.

POTENTIAL ENERGY:the energy POSSESSED by a body by virtue of its position RELATIVE to OTHERS, stresses WITHIN itself, electric CHARGE, and other factors.

Electric MOTOR: A motor is a device which converts ELECTRICAL energy into mechanical energy. Principle of motor : A motor WORKS on the principle that when a rectangular coil is placed in a MAGNETIC field and current is PASSED through it. ... Whereas the force on the side CD of the coil is in the upward direction.

Given in the question :-

Flywheel making 420 revolution/minute , therefore Angular Velocity=420 rpm

The FORMULA for conversion :-

1 rpm. =2π /60 rad/s

Since

ω=420 rpm

Therefore

=420 x 2 x π/60

= 840 × π /60

= 14 π rad/sec

= 14 × 3.14

= 43.96 rad/sec.

Hence the angular speed of flywheel making 420 rev/min is 43.96 rad/sec

Hope it HELPS :-)

Methane(CH4)- 50 - 75%, Carbon dioxide(CO2)- 25-50%, Nitrogen(N2)-0-10%, Hydrogen(H2)-0-1%, Hydrogen SULFIDE(H2S)-0-3%, OXYGEN(O2)-0-0%In some CASES, biogas contains siloxanes

Impulse is a FORCE applied on a BODY over a shoet PERIOD off TIME

(a) Positive :
SINCE, Porter pulls the suitcase up to the platform, and suitcase lifts up.
So, Both Force and dusplacement are in same direction.
So, Work Done is positive.

(b) Positive :
As suitcase falls down, it displaces in downward direction and force of gravity also acts in the same direction.
=> Work done by gravity force is positive.

(c) Zero
When Porter stands on the platform with suitcase in his head,then there is no moment in suitcases.
So, work done by Porter on suitcase is 0.

(d) Negative :
When ball is thrown UPWARD, it displaces in upward direction but Force of gravity acts in downward direction, so Work Done by Force of gravity is negative.


(e) Positive:
While swimming in still water, swimmer push water in backward direction and it displaces water back ward while GIVING swimmer an EQUAL and opposite force in forward direction to SWIM.
So, Work done by swimmer on water is positive and also work done by water on swimmer.

Thanks for asking the question!

ANSWER::

u = √2gh which is velocity on GROUND when BALL approaches the ground.

u = √(2 x 9.8 x 2)

V + LU = 0                            v = velocity of ball when it separates from ground

Lu = -v

L = √(2 x 9.8 x 1.5) / √(2 x 9.8 x 2)

L = √(3/4)

L=√3/2

Hope it helps!

Answer ⇒ Option (b). Remains Constant.

Explanation ⇒ ACCORDING to the question, the particle moves with a constant velocity along a STRAIGHT line, therefore the distance of the line from the origin will remains constant.

Thus, The linear momentum of the particle which will GIVEN by the expression, m × v is constant.

∴ The angular momentum of the particle about the origin will be equals to = moment of the linear momentum about origin.

= Momentum × Distance of line from the Origin.

= p × R

= m × v × r

= constant.

Hence, the answer is option (b).

Hope it helps.

ANSWER:

There are formulae for these:

1.(1/f)=(1/f1)+(1/F2)

2.(1/f)=(1/f1)+(1/f2)-(d/(f1*f2))

hope HELPS you

Given that force is given by mass times acceleration:The velocity TIME graph should indicate that there is an acceleration by SHOWING different VELOCITIES at different time intervals. ​If the velocity time graph shows that the particle is moving at a CONSTANT speed then it means that there is no acceleration and thus no force. Therefore there will be a force acting on the body if the velocity time graph indicates that there are different velocities at different time intervals. Otherwise no force will be acting on the body.

Answer:

500 W TV in 30 min.

Explanation:

ENERGY = Power × TIME of usage

500 × (30×60)s = 900,000.

600 × (20×60)s = 720,000.

:)

The thing is, dogs have more sensitive ears than HUMANS,so they will be ABLE to hear even silght SOUNDS.

A body is said to be in rectilinear if any two PARTICLES of body travels a same distance along two PARALLEL same lines...

HOPE it helps you!!