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Answer:

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Answer:

7.03 × 10^-6 Nm²/kg

Explanation:

From GRAVITATIONAL force formula

F = GMm/d²

G = Fd² / (Mm)

= 1 N × (0.15 m)² / (40 kg × 80 kg)

= 7.03 × 10^-6 Nm²/kg²

Note: The correct Universal gravitation CONSTANT is 6.67 × 10^(-11) Nm²/kg².

EXPLANATION:

which angle HEIGHT of projectile is maximum? ... What will the angle of projection be if the horizontal range of ... The PARTICLE travels for a TIME t = 2*V*sin A/g and the ...

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YES , this can be RIGHT I.e ACCURATE...

Answer:

.

Explanation:

Force of FRICTION is the force which opposes the MOTION of the object.

It always acts in the OPPOSITE direction of the motion.

When a book is press horizontally against the front wall, the force of friction is

..................(1)

Where R= Normal force of the book which is reaction of book exerted by the weight of the book.

R=mg.............(2)

where m=mass of the book, g=acceleration due to gravity

using (1) and (2) we get

So,force of friction is,

.

Answer:

Free oscillations[edit]

When an object is in free OSCILLATION, it vibrates at its natural frequency. For example, if you strike a TUNING FORK, it will begin to vibrate for some time after you struck it, or if you HIT a PENDULUM, it will always oscillate at the same frequency no matter how hard you hit it.

EXPLANATION:

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the south gets ATTRACTED towards north . it is because like pole ATTRACT and UNLIKE pole REPEL

ANSWER:

ROLLING FRICTION MARK me as BRAINLIST

ANSWER:

The angle between P VECTOR + Q vector is 0° while the angle between P vector - Q vector is 180°.

Since RESULTANT vector=√P^2 vector +Q^2 vector +2PQvector cos 0°. (cos 0°=1 and cos 180°=-1)

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Answer:

As we have already discussed earlier, motion is the state of change in position of an object over time. It is described in terms of DISPLACEMENT, distance, velocity, acceleration, time and speed. Jogging, driving a car, and EVEN simply taking a walk are all everyday examples of motion. The relations between these quantities are known as the equations of motion.

In case of uniform acceleration, there are three equations of motion which are also known as the laws of constant acceleration. Hence, these equations are used to derive the COMPONENTS like displacement(s), velocity (initial and final), time(t) and acceleration(a). Therefore they can only be applied when acceleration is constant and motion is a straight line. The three equations are,

v = u + at

v² = u² + 2as

s = ut + ½at²

where, s = displacement; u = initial velocity; v = final velocity; a = acceleration; t = time of motion. These equations are REFERRED as SUVAT equations where SUVAT stands for displacement (s), initial velocity (u), final velocity (v), acceleration (a) and time (T)

DERIVATION of the Equations of Motion

v = u + at

Let us begin with the first equation, v=u+at. This equation only talks about the acceleration, time, the initial and the final velocity. Let us assume a body that has a mass “m” and initial velocity “u”. Let after time “t” its final velocity becomes “v” due to uniform acceleration “a”. Now we know that:

Acceleration = Change in velocity/Time Taken

Therefore, Acceleration = (Final Velocity-Initial Velocity) / Time Taken

Hence, a = v-u /t or at = v-u

Therefore, we have: v = u + at

v² = u² + 2as

We have, v = u + at. Hence, we can write t = (v-u)/a

Also, we know that, Distance = average velocity × Time

Therefore, for constant acceleration we can write: Average velocity = (final velocity + initial velocty)/2 = (v+u)/2

Hence, Distance (s) = [(v+u)/2] × [(v-u)/a]

or s = (v² – u²)/2a

or 2as = v² – u²

or v² = u² + 2as

s = ut + ½at²

Let the distance be “s”. We know that

Distance = Average velocity × Time. Also, Average velocity = (u+v)/2

Therefore, Distance (s) = (u+v)/2 × t

Also, from v = u + at, we have:

s = (u+u+at)/2 × t = (2u+at)/2 × t

s = (2ut+at²)/2 = 2ut/2 + at²/2

or s = ut +½ at²

ANSWER:

POTENTIAL= ML-2T-2

unit is JOULE

EXPLANATION:

SOLVE it your SELF ibuuhyvrh5giggtgtvrvrcr

here we are USING the basic formula for unit conversion through dimensional analysis

any physical QUANTITY is equal to the product of its unit with the magnitude

if you have a physical quantity X then

X = n1u1 = n2u2

where YUVAN YouTube or units of the physical quantity in two different systems and n1and n2 are magnitudes corresponding to two different systems

n2 = n1u1/u2

= 120(1kg/10g)(1m/10²cm)²(1s/10³s)-³

=120(10²)(1)²(10-³)-³

=12×10¹²

answer is (2)

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Answer:

OPTION a.

From units and DIMENSIONS you'll STUDY that arguments of trigonometric FUNCTIONS should be dimensionless

Answer:

LET the velocity of the RIVER be x. the velocity of the river will be in the HORIZONTAL direction

velocity of boat in still water is 5km/hr. As the width of the river is 1 km and time taken by the boat to cross the river along the shortest path is 15 min therefore the velocity of the boat is= 1*60/15= 4km/hr

according to the figure the velocity of the river is along AB . By applying triangle law of vector addition the value of AB COMES to be 3km/hr

Explanation:

speed of car = 54 KMPH

= 54 X 5/18

= 15m/s

(a) V = u+ at

54 = 0+ 2a

a= 27 m/s^2

(b) s= UT + 1/2 at^2

= 27x 2

= 54M

ANSWER:

GRAVITY is strongest fundamental FORCES in nature

Explanation:

The scientific method. When conducting research, scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a HYPOTHESIS (OFTEN in the form of an if/then statement), the results AIMING to support or contradict a theory.

HORIZONTAL COMPONENT is = 50cos30°= 50sqrt3/2N

vertical component is = 50sin30°

= 25N

Answer:

628cm because in one revolution it will GO 2*π*r

So in TWO REV it goes 4πr

=4*(22/7)*50CM

option C is the right answer i. e. for ONE gram of MASS it is 9*10^13 joules.

hope It help uh

ANSWER:

t=2root10

r=18root10

Explanation:

use time and range formula of OBLIQUE PROJECTILE

Magnitude of VACTOR A = SQRT 2^2 + 3^2+(-1)^2 = sqrt14

magnitude of vector B = sqrt (4^2+(-1)^2+(-6)^2)= sqrt53

ANSWER:

• impulse=mass*VELOCITY.
• .1*5=.5kgm/s

Answer:

16m in GROUND &19M from ground to above

ANSWER:

R15=2u2/g(cos15×sin15)

so R 45degree=R15×2u

ANSWER:

ZERO because DISPALCEMENT is zero

Answer:

MAXWELLS RIGHT hand RULE was beam BALANCE

ANSWER:

we think ithey are GOOD because :

1.It helps farmers to buy good SEEDS and other necessary things so they do not have to take loan on high interest

2.Farmers feel good that tere is someone who can help them

3.We can see that the suicide rate of farmers decreased after all the efforts

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Answer:

20.2 × 10¹⁹ N

Explanation:

Given :

Mass of earth = 6 × 10²⁴ kg

Mass of moon = 7.4 × 10²² kg

Distance between them = 3.84 × 10⁵ km = 3.84  × 10⁸ m

We have value of G = 6.7 × 10⁻¹¹ N m² kg⁻²

We have to find FORCE :

We have :

F = G m₁ m₂ / r²

F = ( 6.7 × 10⁻¹¹ ) ( 6 × 10²⁴ ) ( 7.4 × 10²² ) / (  3.84 × 10⁸ )² N

F = 20.2 × 10¹⁹ N

Hence force EXERTED by the earth on the moon is 20.2 × 10¹⁹ N.

Answer:

Given, initial velocity u = 0m/s

Velocity after 2s, v = 4m/s

Acceleration a = (v - u)/t = (4-0)/2 = 2m/s^2

Under UNIFORMLY accelerated MOTION,

After t = 10s

S = UT + (1/2)at^2

S = 0 + (1/2) x 2 x (10^2) = 100m

S = 100m

Dear Student,

◆ Answer -

For 100% EFFICIENCY of a carnot engine the temperature of the source should be infinite.

● Explaination -

Efficiency of Carnot engine is calculated by formula -

η = 1 - T2/T1

Here, for η to be 1 i.e. 100 %, EITHER T2 (temperature of the sink) should be zero or T1 (temperature of the source) should be infinite.

Therefore, for 100% efficiency of a carnot engine the temperature of the source should be infinite.

Hope this helps you...

ANSWER:

Given m1= 2 kg, V1 =? , m2= 20 x 10∧-3 kg, v2=200m/s

        According to the LAW of linear momentum,

                 m1 x v1=m2 x v2

                  2 x v1 = 20 x 10∧-3 x 200

                   v1= 2 x 10∧-2 x 2 x 10∧2 / 2

                        v1= 2m/s

Explanation:

Answer:

160M.

Explanation:

R = u²sin2∝/g

∝ = 45°

R = u²sin90°/g  = u²/g = 40²/10 = 160m.

ANSWER:

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ANSWER:

It will be about 23.4 T (unit).

Explanation:

The FORMULA of magnetic flux is :

ϕ = B × A cosθ

Where B is the magnetic field and A is the area vector.

Let US assume that B is parallel to A.

That IMPLIES,

ϕ = B × A cos0°

Thus,

ϕ = B × A

ϕ = 11.7 T × 2 unit = 23.4 T (unit).

ANSWER:

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ANSWER:

here torque will PLAY a role

Explanation:

the torque required will be totally DEPENDENT on the LENGTH of the scale

(*note i didn't refer any book based on my conscience i just answered this question)

The AREA of the CAR is 8.82 FT

It is CONNECTED to the SEX

Hey...here your answer______________________

In 1920,indian physicist SATYENDRA Nath bose had done some calculations for a FIFTH state of MATTER .Building on his calculations,Albert EINSTEIN predicted a new state of matter --the BOSE EINSTEIN CONDENSATE【BEC】


I hope it will helpful to you

Hey ...... here your answer______________________
Active and Passive Commonest (Very Easy Explanation with Examples)
 
 
 
Active Components:
Those devices or components which required external source to their operation is called Active Components. 
For Example: Diode, Transistors, SCR etc…
Explanation and Example:As we know that Diode is an Active Components. So it is required an External Source to its operation. 
Because,   If we CONNECT a Diode in a Circuit and then connect this circuit to the  Supply voltage., then Diode will not conduct the current Until the  supply voltage REACH to 0.3(In case of Germanium) or 0.7V(In case of  Silicon). I think you got it 
 
Passive Components:
 
Those devices or components which do not required external source to their operation is called Passive Components. 
For Example: Resistor, Capacitor, Inductor etc…
 Explanation and Example:Passive Components do not require external source to their operation. 
Like  a Diode, Resistor does not require 0.3 0r 0.7 V. I.e., when we connect a  resistor to the supply voltage, it starts work automatically WITHOUT  using a specific voltage. If you UNDERSTOOD the above statement about  active Components, then you will easily get this example. 

I hope it will helpful to U

Small engine have small shaft and small arm and BIG engines have big shaft and very very big arm that is why it has LESS RPM

Because there is CHANGE in MAGNETIC FLUX

If FINGERPRINT RED LIGHT is not COMES it is MISMATCHED