Recently Active Physics Questions

1,Is the theorem of perpendicular axes only applicable for planar bodies? 2,Why detergents have small angles of contact? 3,Why in desert areas, the earth surface warms up quickly during the day and cools quickly at night? 4,C ...

When the momentum of a body increased by 10%, its kinetic energy (K.E.) by a)20% b)40% c)44% d)none of these PLEASE GIVE FULL DETAILS ABOUT THE PROBLEM . ...

hello guys, i am a aspirant for jee2012,i know there is very less time left,but can anyone tell me good books for practicing physics,calculus and coordinate geometry(objective problems only)? ...

I Differentiated it d tan(cos-1x)/d x hint given is =>tanθ= 1/ 1+x2 which I think is not possible in any way Answer given inthe book is = -3x(1+x2)-3/2 the way i did the sum is as follows cos-1x=θ =>tanθ= 1-x2 /x .'. ...

How to find the centre of mass of an L shaped lamina formed by 3 squares of different masses? ...

Two uniform solid spheres of equal radii R, but mass M and 4M have a centre to centre seperation 6R.The two spheres are held fixed.A projectile of mass m is projected from the surface of the sphere of mass M directly towards ...

Anyone have any idea, about where usually the INPhO is held in Kolkata? Which school or Institution? Where was it held in 2010?? ...

Two mirrors at an angle θº produce 5 images of a point. The number of images produced when θ is decreased to θº – 30º is (A) 9 (B) 10 (C) 11 (D) 12 ...

*Image* in the given figure find the velocity of the cylinder. assume the cylinder remains in touch with the wedges. all surfaces are frictionless. ...

the photoelectrons ejected from the photocathode of a PMT, are said to be of a random count. i.e. for a single given photon hitting the photocathode, the ejection of photoelectrons are sometimes 10 photoelectrons, sometimes 7 ...

suppose a spring mass system is completely immersed in a liquid . If we give small displacement x to it then will boyant force be considered as restoring force along with -kx or not? ...

Two conducting rings 'P' and 'Q' of radius 'r' and '3r' move in opp. directions with velocity '2v' and 'v' respectively on a conducting surface. there is a uniform magnetic field of magnitude 'B' perpendicular to plane of rin ...

The volume of CO2 gas formed when 2.5g calcium carbonate are dissolved in excess hydrochloric acid at 0degree celsius and 1atm pressure is ? {1 MOLE OF ANY GAS AT 0 DEGREE CELSIUS AND 1 ATM PRESSURE OCCUPIES 22.414L VOLUME} A ...

Which is the best coaching institute in vizag for IIT???? Has anyone got top 10 in IIT from those branches of institutes in vizag!!!! Also what are the courses of Aptitude tests for IIT if it gets implemented from 2014 ...

A particle of mass m moves in xy plane along the line y=x-4,with constant velocity v. find the angular momentum of the particle about origin at any instant of time t.. ...

1) A radioactive nuclide can decay simultaneously by two different processes which have deacy constants λ1 and λ2 . The effective decay constant of the nuclide is λ. a) λ=λ1 + λ2 b)λ= 1/2 (λ1 + λ2) c) 1/λ = 1/λ1 + ...

Determine or estimate the net heat flux density P between two parallel plates at distance L from each other, which are at temperatures T1 and T2, respectively. The space between the plates is filled with a monoatomic gas of m ...

Hi please see http://www.ipho2012.ee/physicscup/ :O :O Are they giving any prize(s) ? At least I could not make out anything.. and I'm late to participate.. ( I thought I would just cheat :D) ...

When a particle is flying from the ground slowly upward against gravity. Since the kinetic energy is zero throughout the process what is bringing the change in potential energy? ...

well theres this question...in which i find that theres a small language error...kindly help HC VERMA PART ONE CHAPTER 12 EXERCISES Q 11 A block of mass 0.5 kg hanging from a vertical spring executes simple harmonic motion of ...

i am stuck in solving the problem question no 39 in magnetic field of hcv part 2 a particle of mass m and charge q is projected into a region having a perpendicular magnetic field b.find the angle of deviation of the particle ...

*Image* mass of rod = 30 kg length = 0.8 m is free to rotate about horizontal axis 'O' passing through its centre. a particle p of mass = 11.2 kg falls vertically through a height h = 36/245 m and collides elastically with th ...

Find the effective value of the alternating current that changes according to the law : I = Io when 0 < t < T/8 I = 0 when T/8 < t < T/2 I = -Io when T/2 < t < 5T/8 I = 0 when 5T/8 < t < T I = Io when ...

A pole of height 4m is kept in front of a vertical plane mirror of length 2 m . The lower end of the mirror is at a height of 6m from the ground. The horizontal distance between the mirror and the pole is 2 m . Upto what mini ...

Q.1. A man uses a concave mirror for shaving.He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 times enlarged.Find the focal length of the mirror. Q.2.Find the diameter of the image of th ...

initially the system is held at rest nd spring is in natural length. friction between disc nd ground is sufficient to prevent slipping. now system is released frm rest position. 1) the min. coeff. of friction reqd. to prevent ...

1. A space vehicle of mass m is in a circular orbit of radius 2Re about the earth (mass me). What is the work done by an external agent to transfer it to an orbit of radius 4Re? 2. Three stars each of mass M and radius R are ...

I was reading Mechanics where it was said that, Particle is a hypothetical mass-point that has no size. Can you please explain clearly... ...

The heart of a man pumps 4 liters of blood per minute at pressure of 130 mm of mercury. If the density of mercury is 13.6 g/cm3 then calculate the power of heart. (g=9.8m/s2) ...

Two projectile are fired frm surface at a angle of 30 degree and 60 degree respectively with the horizontal...path of the first as seen by the other is a) parabola b)ellipse c)st line d)none ...