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HOPE IT HELPS YOU.....

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Answer:

160/3 KMS

Explanation:

SINCE each speed is GIVEN at the half of the journey, so in

Case I: When speed is 100 km/h,

We know that speed = distance/time, so distance = speed × time

》distance = (100 × 1)/3

》distance = 100/3 kms

Case II: When speed is 60 km/h,

distance = speed × time

》distance = 60 × 1/3

》distance = 20 km

total distance = (100/3 + 20) kms

》" = (100+60)/3

So total distance = 160/3 kms

ANSWER:

I'm SORRY I can't answer this due to TECHNICAL ISSUES

ANSWER:

concave and CONVEX both lenses are UESD in our DAILY life.

glasses for short SIGHTEDNESS and far sightedness.

in binoculars.

in telescopes

ANSWER:

I didn't UNDERSTAND what U have INPUT

I'm SORRY

ANSWER:

DISTANCE or DIFFERENCE........... ..

Answer:

Chemical energy may be RELEASED during a chemical reaction, often in the form of heat; such reactions are called exothermic. Reactions that require an input of heat to PROCEED may store some of that energy as chemical energy in newly FORMED bonds.

ANSWER:

X-rays are the form of electromagnetic radiation that can pass through the solid objects ,including the body.they are used to VIEW image of the bone and other structures of the body .

Acceleration will be ZERO because (explanation is below) VELOCITY is a VECTOR quantity (it has both SPEED and direction

ANSWER:

PETTIGREW

Explanation:

Pettigrew

Answer:

Rating of bulbs hasn't been specified which is very important. Let's assume each bulb is rated at 120V,50Hz supply. Now what it means is that when 40W (or 60W) bulb will be connected across rated voltage i.e.120V ac supply then power dissipation across it will be 40W (or 60W). Rating is important because say if 40W bulb rated at 120V supply is connected across 220V supply then it will not work (might burn or blow up), meaning thereby a device can not work at a voltage much higher than its rated voltage.

One more information that you get from rating is the resistance of each bulb.

P=(V*V)/R

Since both bulbs are rated at same voltage, we can say that resistance of each bulb is inversely PROPORTIONAL to its rated power. Therefore

R (40W bulb) > R (60W bulb)

We should know that the bulb across which power dissipation is more will glow brighter. Now

1. When connected in series: In a series connection, current FLOWING across each element is same. So when 40W bulb and 60W bulb are connected in series, same current will flow through them. To find which bulb will glow brighter we need to find the power dissipation across each of them. From the relation

P=(I*I) R

since current is same we can say that power dissipation will be higher for the bulb with higher resistance i.e. 40W bulb.

Hence 40W bulb will glow brighter in series connection.

2. When connected in parallel: In a parallel connection, voltage across each element is same. So when 40W bulb and 60W bulb are connected in parallel, voltage across them will be same (100 V in the given case). To find which bulb will glow brighter we need to find the power dissipation across each of them. From the relation

P=(V*V)/R

since voltage is same we can say that power dissipation will be higher for the bulb with lower resistance i.e. 60W bulb.

Hence 60W bulb will glow brighter in parallel connection

Answer:

the MOTION of the body in the circular PATH with the same SPEED is called uniform circular motion.

ANSWER:

C ans

Explanation:

EXPLANATION:

this is UR ANSWER. ...........

ANSWER:

No ,it is not NECESSARY

ANSWER:

➤in a uniform CIRCULAR motion the speed remains constant

➤the direction changes continuously

ANSWER:

i don't know

but i can ASK my TUTION teacher

but FIRST you have to follow me

ANSWER:

yaaar AAA tan minnu V ni ONDA

ANSWER:

AVERE SPEED 15 km PER SECOND

HEY Dear,

● ANSWER -

Gallons lost per hour = 6.286 gallons/hr

◆ EXPLANATION -

Time taken by the car to empty the FUEL tank is -

Time = distance / velocity

Time = 112 / 64

Time = 1.75 hrs

No of gallons lost per hour are calculated by -

Gallons lost per hour = Total / hrs

Gallons lost per hour = 11 / 1.75

Gallons lost per hour = 6.286 gallons/hr

Hope that was useful..

ANSWER:

ACCELERATION DUE to GRAVITY =G

= 9.8 m/s²

dimensions = (M^o L¹T-²)

what is the QUESTION brooo

HOLA!

●Real image is INVERTED.(when u see the concave side of a spoon)

●Virtual image is ERECT.(when u see in the MIRROR)

Heya☺✌✌....

A DEGREE or intensity of heat PRESENT in substance or an object ......

<U>hope it HELPS u!!!!

Answer:

mark me as brainlieast

Explanation:

Newton's Laws of Motion

Edit

Newtons law describes the body's motion in terms of physics. It has been widely accepted by the SCIENCE community for the past century, in total there are three laws that affect the laws of motion. This indicates that the PROJECTILE is MOVING.

of acceleration. His law is;

"The rate of change of momentum of an object is directly proportional to the resultant force acting on the body and is in the same direction."

This law means that the force of the object moving will be equal to the opposing force such as air resistance. Mathematically, Newton's second law is stated as:

{\displaystyle {\overrightarrow {\mathbf {F} }}={\frac {d{\overrightarrow {\mathbf {p} }}}{dt}}} \overrightarrow {{\mathbf {F}}}={\frac {d\overrightarrow {{\mathbf {p}}}}{dt}}

where F is the total force, p is the momentum, and t is the time passed. In classical physics, where the object's mass is constant, this equation becomes a more familiar form:

{\displaystyle {\overrightarrow {\mathbf {F} }}={\frac {d{\overrightarrow {\mathbf {p} }}}{dt}}={\frac {dm{\overrightarrow {\mathbf {v} }}}{dt}}=m{\frac {d{\overrightarrow {\mathbf {v} }}}{dt}}=m{\overrightarrow {\mathbf {a} }}} \overrightarrow {{\mathbf {F}}}={\frac {d\overrightarrow {{\mathbf {p}}}}{dt}}={\frac {dm\overrightarrow {{\mathbf {v}}}}{dt}}=m{\frac {d\overrightarrow {{\mathbf {v}}}}{dt}}=m\overrightarrow {{\mathbf {a}}}

where m is the object's mass and a is the acceleration of the object. Example

A skydiver jumps from a plane and accelerates until he reaches the highest velocity possible, when this happens his acceleration is equal to nothing, this happens when air resistance is equal to the downward force of the skydiver.

Newton's THIRD Law of motion

Edit

Newtons third and final law is the law of Interaction in which he Doubted;

"All forces occur in pairs, and these two forces are equal in magnitude and opposite in direction." It can be said that "every action has opposite and EQUIVALENT reaction"

Examples

When we push a wall, it creates an opposite amount of force, thus, either we move or does the wall move.

This in simple terms is that to every action force there is an equal, but still the same, reaction force. For example if one presses on a wall a equal and same force is pushed back at them.

Answer:

D' ALEMBERT'S PRINCIPLE AND ITS APPLICATIONS. INTRODUCTION:- D'Alembert's principle in mechanics, principle permitting the reduction of a problem in dynamics to one in statics. ... The principle shows that NEWTON's THIRD law of motion applies to BODIES free to move as well as to STATIONARY bodies.

ANSWER:

if an OBJECT moves in a circular path with uni form speed it's MOTION is CALLED UNIFORM circular motion

option A

EXPLANATION:

Three 2 ohm resistance are in SERIES so it's equivalent is 6ohm and this 6ohm is parallel with another 6ohm which is parallel to voltage source.current will be devided EQUALLY in both 6ohm resistance.that is equal to 2amp.three 2ohm resistance are in series so current will be same in all.

voltage ACROSS 2ohm will be PRODUCT of current and resistance.it will be 4volt

is there any confusions??

feel free to comment

thank you.

→

A = 3 I + 2 j

→

B = 3 I + 7 j

Area of PARALLELOGRAM= ?

We know, that area of parallelogram = ★

area of parallelogram =

★

★

★

★

=

=

=

hence, area of parallelogram is 27 SQ. UNITS

CONVEX mirror

hope this HELPS U

Answer:

32.8

Explanation:

Total distance travelled

= 30km/h * 0.5 h + 25km/h * 1 2/3 h

+ 40km/h *2 h

= 136.667 km

Total TIME = 0.5+1 2/3 + 2

= 4.1667 h

Average speed = 136.667/4.1667

= 32.8 km/h

Hope it helps

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Answer:

Explanation:

RESISTANCE of a CONDUCTOR depends on

Length of conductor, are of cross-section, Temperature and nature of material

Length and temperature are DIRECTLY PROPORTIONAL

Where as AREA is inversely proportional

here is your ANSWER MATE

i THINK this will HELP you

ANSWER: -secx+c

Explanation:

SUPPOSE ,cosx=z

-sinx dx =dz

⇒

⇒-{}+c

⇒+c

⇒secx+c

Explanation:

Because Renewable RESOURCES of Energy is continuous whereas NON Renewable Resources take too MUCH TIME to regenerate.

EXPLANATION:

u=0

v=72km/h

72X5/18

20m/s

t=10sec

a=?

v=u+at

20=0+aX10

20=10a

a=2m/s²

average velocity=v+u/2

20+0/2

20/2

10m/s

v²=u²+2as

(20)²=0²+2X2Xs

400=0+4s

4s=400

s=400/4

s=100m

ANSWER:

D) MAY be UNIFORM or non–uniform

SEC X + C

so ANSWER it sec X + c

EXPLANATION:

I HOPE it's HELPFUL you

the WATER WEIGHT is MINIMUM 6 KG

Answer:

Infrared rays are less controlled as compared to MICROWAVE radiation, which is more specified. The WAVELENGTH of infrared is shorter than that of microwave radiation, which FALLS in between radio waves and infrared on the ELECTROMAGNETIC spectrum. This MEANS infrared rays have a higher frequency than microwaves.

Hope this answer helps you!

Constructive and Destructive INTERFERENCE. In the last section we discussed the FACT that waves can move through each other, which means that they can be in the same place at the same time.This SITUATION, where the resultant wave is BIGGER than EITHER of the two original, is called constructive interference.✔✔

Answer:Relation Between Group Velocity And Phase Velocity

Waves can be in the group and such groups are called as wave PACKETS, so the velocity with a wave packet travels is called group velocity. Velocity with which the phase of a wave travels is called phase velocity. The relation between group velocity and phase velocity are proportionate.

Explanation

Group Velocity And Phase Velocity

The Group Velocity and Phase Velocity relation can be mathematically written as-

Vg=Vp+kdVpdk

Where,

Vg is the group velocity.

Vp is the phase velocity.

k is the angular wave number.

Group Velocity and Phase Velocity relation for Dispersive wave Non-dispersive wave

Type of wave

Condition

Formula

Dispersive wave

dVpdk≠0 Vp≠Vg

Non-dispersive wave

dVpdk=0 Vp=Vg

Group Velocity And Phase Velocity Relation

The group velocity is DIRECTLY PROPORTIONAL to phase velocity. which means-

When group velocity increases, proportionately phase velocity will ALSO increase.

When phase velocity increases, proportionately group velocity will also increase.

Thus we see direct dependence of group velocity on phase velocity and vise-versa.

Relation Between Group Velocity And Phase Velocity Equation

For the amplitude of wave packet let-

?? is the angular velocity given by ??=2????

k is the angular wave number given by – k=2πλ

t is time

x be the position

Vp phase velocity

Vg be the group velocity

For any propagating wave packet –

Δω2t−Δk2x=constant ⇒x=constant+Δω2Δk2t—–(1)

Velocity is the rate of change of displacement given by

v=dxdt

Hence group velocity is got by differentiating equation (1) with respect to time

Vg=dxdt=Δω2Δk2=ΔωΔk Vg=limω1→ω2ΔωΔk=dωdk ——(2)

We know that phase velocity is given by Vg=ωk⇒ω=kVp

Substituting ?? = kVp in equation (2) we get-

Vg=d(kVp)dk

Thus, we arrive at the equation relating group velocity and phase velocity –

Vg=Vp+kdVpdk

for constant speed on STRAIGHT road wd =0

so wd by man = MGH = 80*10*20=160000Jor 16KJ

EXPLANATION:

I= Q/T

4 = Q/10

Q = 40 C

Q= ne

40= N × 1.67× 10^-18

40/1.6×10^-19= n

Hope it helps

HEYA GM ❤

HOPE IT HELPS YOU.....

TQ ❤ ❤

ANSWER:

U =6m/s

v=4.4/s

t =0.04s

a =v-u/t

a =1.6/0.04

a=16/10×100/4

a=40 m/s^2

Explanation:

The BASIC unit of MEASUREMENT for inductance is called the Henry, ( H ) after JOSEPH Henry, but it also has the units of Webers per AMPERE ( 1 H = 1 Wb/A ).