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The law of inertia

Posted by Moksha K 2 years, 3 months ago

1 answers

Deepak Handi 1 year, 9 months ago

The object is at rest when suddenly force the body wants to remains at rest . eg when person who siting in bus when driver apply break the person feels backward jerk ..

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Dimension of area

Posted by Liza Barman 2 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ankush Rawani 2 years, 3 months ago

Area= Length × Breadth = Length × Length = [L] ×[L] = [L²]

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The velocity of a particle changes with time as V is equals to T square minus 2 T if starts from x is equals to zero then calculate its position at 2 second average speed in first 4 second and average velocity first 5 seconds

Posted by Account Deleted 2 years, 3 months ago

CBSE > Class 11 > Physics

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acceleration of a particle varies with time as a is equals to t square + 2 T + 1 its velocity is zero at zero second calculate change in velocity between 0 and 2 second and average acceleration between first three seconds

Posted by Account Deleted 2 years, 3 months ago

CBSE > Class 11 > Physics

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Obtain an expression for the centripetal force f acting on a particle of mass m moving with velocity v in a circle of radius r .Take dimensionless constant k=1

Posted by Anshika Gupta 2 years, 3 months ago

CBSE > Class 11 > Physics

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A train moves a distance of 10 m with a constant speed of 40 mper sec and moves the next 5 m with a constant speed of 30 mper sec calculate the average speed

Posted by Priya Kumari Riya Kumari 2 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Priya Kumari Riya Kumari 2 years, 3 months ago

Answer

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Sanjay Kumar 2 years, 3 months ago

15/70 m/s

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A ball is projected horizontal I with a speed u from the top of the impline plane of angle a(alpha) with horizontal at what distance along the plane the ball will strike the plane

Posted by Sakshi Chakole 2 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Arpandeep Kaur 2 years, 3 months ago

Answer

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What is limitation of dimensional analysis?

Posted by Liza Barman 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Tanushree Mukherjee 2 years, 4 months ago

The limitations of dimensional analysis are: (i) We cannot derive the formulae involving trigonometric functions, exponential functions, log functions etc., which have no dimension. (ii) It does not give us any information about the dimensional constants in the formula.

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A particle is thrown with velocity u making an angle theta

Posted by Arsh Deep 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Tanushree Mukherjee 2 years, 4 months ago

times taken to reach P is 1s therefore v2=u2+2aS v2=u2cos2θ−2gh let the distance from P to reach at the top be x v2=u2+2as 0=u2cos2θ−2gh−2gx x=2gu2cos2θ−h time taken is v=u+at 0=ucosθ−g−gt t=gucosθ−1 time taken to reach top from P is 1s 2g=ucosθ maximum height H=2gu2cos2θ as the verical component is ucosθ therefore H=2g(2g)2=2g=19.6m

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A body is moving along x axis in straight line whose position is given x=(-2t + t)m plot Velocity 0 to 3 second and acceleration time graph

Posted by Aashi Pal 2 years, 4 months ago

CBSE > Class 11 > Physics

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How many radians are present in 18630 second

Posted by Nisha Bansal 2 years, 4 months ago

CBSE > Class 11 > Physics

2 answers

Satyam Dhawan 2 years, 4 months ago

1degree =60minuts 1minuts=60seconds So 18360/60×60 18360/3600 1836/360 612/120 204/60 68/20 34/10 17/5 radians

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Satyam Dhawan 2 years, 4 months ago

1degree =60minuts 1minuts=60seconds

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Explain the origin of elasticity in a solid a one basis of microscopic nature of the solid

Posted by Ramthienghlim Lungtau 2 years, 4 months ago

CBSE > Class 11 > Physics

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Differenciation

Posted by Madhu Dwivedi 2 years, 4 months ago

CBSE > Class 11 > Physics

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Priyanshi Singh 2 years, 4 months ago

Physical meaning of differentiation is to find the slope at any given point

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Size of 1 water molecule is 1Mm.Find out number of water molecules in 1cm³ volume

Posted by Yuvraj Singh 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Yuvraj Singh 2 years, 4 months ago

Total no. Of molecule = Total volume /H2O volume 10–⁶ / 10–⁶ =. 1

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The instantaneous velocity of a body, moving along a straight line whose position is described by the equation x=9+2t2 (in cm), at time 5 seconds is

Posted by Rohan Preet 2 years, 4 months ago

CBSE > Class 11 > Physics

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3. A conducting sphere of radius unknown charges 2.5 of the electric field 70 cm from the centre of the centre of the sphere is 2.5X105 N/C & points radially inwards, What is the net charge on the sp here? 30cm has

Posted by Devipriya . M 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Devipriya . M 2 years, 4 months ago

Electric field intensity (F) at a distancect from the centre of a sphere containing net chan is given by the relation.. E = 9/(4pi*epsilon_{0} * d ^ 2) Where g = m * e ^ 2 * eLonge = 2.5 * 10 ^ 5 * N / l * l d = 70 com = 0.7m And = 1/(4pi*epsilon_{0}*t) = 9 * 10 ^ 9 * Nl * m ^ 2 / (c ^ 2) q = E(4pi*epsilon_{0}) * d ^ 2 =(2.5 * 10 ^ 5 * (0.7) ^ 2)/(9 * 10 ^ 9) =0.1361 * 10 ^ - 4 * C Because the electric field lines point radially inwards, the charge on the sphere is negative Therefore, the net change. on the sphere is 0.1361

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A student measured the thicknessof a thin sheet with the help of screwgauge. The reading taken by him were0.932cm,0.975cm, 0.947cm,1.026,1.0176cm.Find the mean absoulute error,fractional error,precentage error.

Posted by Vaishnavi Gupta 2 years, 4 months ago

CBSE > Class 11 > Physics

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y=cos(x²+2x+1)

Posted by Aditi Chib 2 years, 4 months ago

CBSE > Class 11 > Physics

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1/2 mv2 = mgh

Posted by Aman Singh Free 🔥 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Arpita Behera 2 years, 4 months ago

Home > Check the equation 1 / 2 mvsquare=mgh is dimensionally correct or not Question Check the equation 1/2mvsquare=mgh is dimensionally correct or not Solution 1/2mv² = mgh we have to check the correctness by dimensional analysis So LHS Dimensional formula of 1/2mv² will. be [M¹ L²T-²] so now RHS mgh dimensional formula of mass is [M¹] dimensional formula of g (acceleration due to gravity) is [ L¹ T-²] dimensional formula of height(length) is [L¹] so dimensional formula of mgh will be = [M¹ L²T-² ] so LHS = RHS it means formulas are dimensionally correct.

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Write 20 dimension

Posted by Sarvesh Patel 1 year, 10 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 10 months ago

In total, there are seven primary dimensions. Primary (sometimes called basic) dimensions are defined as independent or fundamental dimensions, from which other dimensions can be obtained. The primary dimensions are: mass, length, time, temperature, electric current, amount of light, and amount of matter.

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Equivalence of 1watt hour in si unit

Posted by Arifa Khatun 1 year, 10 months ago

CBSE > Class 11 > Physics

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Preeti Dabral 1 year, 10 months ago

The watt-hour is a unit of energy equal to one watt of output for an hour. It is equal to 3,600 joules. While the watt is the SI unit of power, electrical power consumption is usually measured in Kilowatt-hours for a household.

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What is classical science?

Posted by Rushika Singh 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Madhu Dwivedi 2 years, 4 months ago

Classical science is the science in which we study about macroscopic such as thermodynamics , entropy, light effect, energy etc.

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What is difference between gravitational mass and weight of a body ?

Posted by Japneet Khosa 2 years, 4 months ago

CBSE > Class 11 > Physics

1 answers

Madhu Dwivedi 2 years, 4 months ago

Mass is the amount of matter whereas weight is the force exerted by the earth on an object , that's why the SI unit of weight is newton

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What is power?

Posted by Janvi Mourya 2 years, 5 months ago

CBSE > Class 11 > Physics

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Mr. Harpal Singh 2 years, 5 months ago

In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second

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How to convert 0.25 into degree

Posted by Iffat Gufran 1 year, 10 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 10 months ago

14.32394

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The calorie is a unit of heat or energy and it equals about 4.2J where 1J=1kgm²s-² suppose we employ a system of units in which the unit of mass equals

Posted by Debasish Borah 1 year, 10 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 10 months ago

The dimensional formula of energy or heat = u = [ ML²T^-2].
Assume that, M₁, L₁, T₁ and M₂, L₂, T₂ are the units of mass, length and time in given two systems.
{tex}\therefore{/tex} M₁ = 1 kg, M₂ = {tex}\alpha{/tex} kg
L₁ = 1 m, L₂ = {tex}\beta{/tex} m
T₁ = 1 s, T₂ = {tex}\gamma{/tex} s
n₁ and n₂ are the magnitudes of heat or energy of system one and system two respectively.
For a given physical quantity, the product of its magnitude and unit is always constant.
n₁u₁ = n₂u₂
or {tex}n _ { 2 } = n _ { 1 } \frac { u _ { 1 } } { u _ { 2 } } = 4.2 \times \frac { \left[ \mathrm { M } _ { 1 } \mathrm { L } _ { 1 } ^ { 2 } \mathrm { T } _ { 1 } ^ { - 2 } \right] } { \left[ \mathrm { M } _ { 2 } \mathrm { L } _ { 2 } ^ { 2 } \mathrm { T } _ { 2 } ^ { - 2 } \right] }{/tex}
{tex}= 4.2 \left[ \frac { \mathrm { M } _ { 1 } } { \mathrm { M } _ { 2 } } \right] \times \left[ \frac { \mathrm { L } _ { 1 } } { \mathrm { L } _ { 2 } } \right] ^ { 2 } \times \left[ \frac { \mathrm { T } _ { 1 } } { \mathrm { T } _ { 2 } } \right] ^ { - 2 }{/tex}
{tex}= 4.2 \left[ \frac { 1 } { \alpha } \right] \times \left[ \frac { 1 } { \beta } \right] ^ { 2 } \times \left[ \frac { 1 } { \gamma } \right] ^ { - 2 }{/tex}
n₂ = 4.2{tex}\alpha ^ { - 1 } \beta ^ { - 2 } \gamma ^ { 2 }{/tex} new unit
Therefore, 1 cal = {tex}4.2 \alpha ^ { - 1 } \beta ^ { - 2 } \gamma ^ { 2 }{/tex} new unit

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Plan to go to a place by vehicle. Take readings of odometer and speedometer after every 5minutes till you reach your destination. Record these observations in tabular form; plot graphs between distance-time and speed time. State whether this motion is a uniform or non-uniform motion.

Posted by Jahnvi Somani 1 year, 10 months ago

CBSE > Class 11 > Physics

1 answers

Preeti Dabral 1 year, 10 months ago

Plan to go to a place by a vehicle. Take readings of odometer and speedometer after every 5 Minutes till you reach your destination. Record these observation in tabular form; plot graphs

Time (in Mins) Odometer (km) Speedometer (Km/Hr)

0 0 0

5 2 30

10 5 50

15 9 50

20 13 60

25 18 60

30 22 50

35 25 30

40 27 0

Motion is not uniform

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Give the relayinship between light year and meter

Posted by Niharika Verma 2 years, 5 months ago

CBSE > Class 11 > Physics

1 answers

Vikas Ff 2 years, 5 months ago

A light year is the distance light travels in oneyear. ... A light year here has units of meters, so the meter units cancel and only the “light year" unit remains.

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Velicity time graph

Posted by Shahid Shahid 2 years, 6 months ago

CBSE > Class 11 > Physics