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Speed =Distance TRAVELLED / Time taken

Echo is a reflected SOUND.

To hear an echo, sound has to travel a distance from the source to the reflector and then BACK to the source. 

So, if distance between source and reflector is x, then total distance travelled by sound will be 2X. And SUPPOSE time taken is 't'

Speed of sound=Total distance travelled / Time taken

=2 x / t

F=0.6N.
u=5m/s.
v=6m/s.
t=2s.
a=1/2=0.5m/s2.
F=ma.
0.6=0.5m.
0.6/0.5=m.
1.2=m.

Mass of the BODY is 1.2 KG.

2) ACCELERATION = 16-6=10m/s^2

VELOCITY= ACCEL. × time

= 10×10

=100m/s

distance= v×t

=100×10

= 1000M=1km

3) circumference= 2πr

3140=2πr

r=3140/2×3.14

r=500m

diameter =2×r

=1000m

distance covered by SCOOTERIST = circumference/2

= 3140/2

= 1570m

displacement= diameter of circle

= 1000m or 1km

4) displacement=v×t

=5×10

=50m

S = u×t +1/2 g×t^2
As GIVEN that body is DROPPED
So, u = 0 m/s ,so u×t = 0
Now put value of t=4sec
S = 0 + 1/2 × 9.8× 4×4
S = 78.4 m

They GET STICK YO that REGION

When a charged PARTICLE moves in a region CONTAINING a MAGNETIC field will starts MOVING

The DIMENSIONAL formula for magnetic flux is[ML^2T^-2A^-1],where A is UNIT of current.

A+b........................

10m/s.........................

The IMAGE is not CLEAR
SEND it again

It will ACT same on EQUATOR and on POLES

By SECOND EQ. of MOTION acce.=18
again by second eq. s=1089

Here is the solution :

In general Force is calculated in Newtons,

1 N = 1 kg m/s²,

Now,
we know that,

Force = Rate of change of momentum,

=> F = ∆P/∆t ,

∆ indicates change, ∆P = P(FINAL) - P(initial)

Momentum (P) = mass (m) x Velocity(v)

Final momentum = m * v(final)

=> 1000*0 (As the body COMES to rest, It's velocity becomes 0)

=> P(Final) = 0,

Initial momentum = m * initial velocity

=> P(initial) = 1000 kg * 40 km/hr

1 km/hr = 5/18 m/s,

=> 40km/hr = 40*5/18 m/s

=> P(initial) = 1000*200/18 Kg m/s,

Time or change in time = 5 sec,

=> Force = ( P(final) - P(initial) )/Time

=> Force = (0 - 1000*200/18)/5 kg m/s²

=> Force = -1000*40/18 N

=> Force (F) = -2222.22222 Newtons

Therefore, The AMOUNT of Force applied by tree = -2222.2222 Newtons,

-ve sign indicates opposite direction to the velocity of CAR,

Hope you understand, Have a great day,
Thanking you, Bunti 360 !.

It happens when a SOUND VIBRATES in an OPEN PLACE

The NATURE of motion is non UNIFORM motion which is not ALONG straight LINE

Take a bar magnet. A PENCIL. A MAGNETIC compass and a white sheet.
Place bar magnet in on white sheet. And place the compass nearest to the north pole of bar magnet. point by pencil where compass needle showing DIRECTION. Again place the compass on the point POINTED you before. Again and again doing this you can FIND that last point directed to south pole.
By this experiment you can also see that magnetic field is towards north to south pole.

20×5=100m MARK it BRAINLIEST

A solenoid is a cylindrical coil of wire whose DIAMETER is small compared to its length. When an ELECTRIC current flows through the wire the solenoid GENERATES a MAGNETIC field similar to that of a bar magnet. ... A solenoid is an electromagnet but an electromagnet needn't necessarily be a solenoid...

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

First LET's APPLY third equation of motion

v² - u² = 2as

80 CM in m = 80/100 or 0.8 m

v² - 0 = 2(10)(0.8)

V = √16

v = 4 m/s

As we know that

Momentum = Mass × Velocity

P = mv

P = (10)(4)

P = 40 kg m/s

Hope it helps

Pressure = density /VOLUME as volume =ROW H G
pressure =d/row h g

When diameter BECOMES 2 times ,the radius of earth will also becomes 2 times.

we know that gravitational FORCE due to earth is directly proportional to its mass and inversely proportional to its radius.

so let its WEIGHT was w and now it's w'.

so w/w' = (M/R^2)/(M'/R'2)=MR'^2/M'R'^2.
we are given M'=2M and R'=2R

so
w/w'=M(2R)^2/2MR^2
w/w'=4MR^2/2MR^2
w/w'=2
or w'=2w.

It shows that weight becomes TWICE.

There are two MOLECULES of HYDROGEN and one molecule of OXYGEN

Diffusion is the net movement of MOLECULES or atoms from a region of high concentration (or high chemical potential) to a region of low concentration (or low chemical potential) as a result of random motion of the molecules or atoms. Diffusion is driven by a GRADIENT in chemical potential of the diffusing species.

A gradient is the change in the value of a quantity e.g. concentration, pressure, or temperature with the change in another variable, USUALLY distance. A change in concentration over a distance is called a concentration gradient, a change in pressure over a distance is called a pressure gradient, and a change in temperature over a distance is a called a temperature gradient.

The word diffusion derives from the Latin word, diffundere, which means "to spread way out".

A distinguishing feature of diffusion is that it depends on particle random walk, and results in mixing or mass transport without requiring directed BULK motion. Bulk motion, or bulk FLOW, is the characteristic of advection.[1] The term convection is used to describe the combination of both transport phenomena.

E=W*t
=100*6
= 600 WH
600 Wh= 600*60*60
=2,160,000J

Answer:

20

Explanation:

40-20=20

very yijcbcjxh

1 joule= 10000000 ERG

I mean 10 to the power 7

HEYA MATE,

HERE IS UR ANSWER.

THANKS for asking this question.

Force of gravity on 1kg is 10 N
F = mg
10 = 1 * g
g = 10 m/s^2

Change in Potential energy = mg * ( h2 - h1 )
= mg * ( h - 0 )
= mgh

100 = mgh
h = 100 / mg
h = 100 / (0.5 * 10)
h = 20 m

Height of the tower is 20 m

I HOPE IT HELPS U.

F=change in momentum/time
=Pf-Pi /t
=20-2/10
=1.8N
Hope this HELPS...!!!

The scalar product of TWO VECTORS A and B is a scalar quantity equal to the product of the MAGNITUDES of the two vectors and the cosine of the smallest ANGLE between them. The scalar product is commutative, A×B = B×A. When we form the scalar product of two vectors, we MULTIPLY the parallelcomponent of the two vectors.

Procedure:

• Prepare 5% solution of each: Sodium sulphate and BARIUM chloride.

• Take little amount of sodium sulphate in a CONICAL flask and a little solution of barium chloride in an ignition tube.

• Hang the ignition tube in the conical flask as shown in the figure below.

• Put CORK on the flask. Weigh the flask .

• Now, mix well the two solutions.

• Weigh the flask once again.

Observation :

• Chemical REACTION is observed.

• Weight of the flask remains unchanged before and after the reaction

Conclusion :

• Total mass of the products = Total mass of the reactants.

Hence, Law of conservation of mass is proved.

Hi Friend
REFER the ATTACHMENT for the answer
Hope it HELPS you ☺☺

Mark as BRAINLIEST.....

Work DONE by Olivia is equivalent to his Potential ENERGY here.

PE = mgh

m = 50 + 60 = 110 kg
g = 9.8 m/s²
h = 15 m

Put in the values to get your answer to the first PART!!

For 2nd part just add 10 kg to m and then solve it in the same way, by PE = mgh.

Lens FORMULA: 1\v -1/u = 1/f and MIRROR formula: 1/f =1/u +1/v . I hope it HELPS you FRIEND

Given CONDITIONS ⇒

Mass of the Potassium Chloride = 2.5 g.

Volume of the Potassium Chloride SOLUTION = 50 mL.

∵ Concentration = Mass/Volume

∴ Concentration of the Potassium Chloride in Solution = 2.5/50

= 0.05 g/mL.

∴ Mass-volume Concentration in % = 0.05 × 100

= 5 %

Hope it helps.

Your questions itself explains why so. The velocity in the fluid is a point PROPERTY, it can vary from point to point in the flow. In the steady flow, the velocity is CONSTANT at a point and it is invariant with respect to time,it doesn't mean that the velocity is constant every where in the fluid flow(if it is constant everywhere then it would be called an uniform flow). The velocity can vary due to area change,body forces ETC. Temporal invariance at a point is the only CHARACTERISTIC of a steady flow.

As we know that the magnetic field in a solenoid is due to the flow of electricity through the wire.
as the flow of CURRENT will be there the solenoid will have magnetic field but as it will START DECREASING then it will start LOSING its magnetic properties.

MASS = 0.1 kg
Velocity = 100 m/s
Recoil = 0.1*100 = 10 N

Yes the BOAT will move due to the CHANGE in INERTIA