it takes 2s for a sound wave to travel b/w 2 fixed points when day temp is 10deg cal if temp rise to 30 deg cal sound wave travels b/w same fixed points

Anonymous User Mathematical physics 17 Aug, 2019 1 Answer 88 views

A uniform solid hemisphere of radius 10 m and mass 64 kg is placed with its curved surface on the smooth horizontal surface and a string AB of length 4m is attached to point A on its rim as shown in the figure. Find the tension in the string if hemisphere is in equilibrium.

Anonymous User Physics 15 Aug, 2019 1 Answer 417 views

A uniform rod of mass M and length L is free to rotate about a frictionless pivot located L/3 from one end. The rod is released from rest incrementally away from being perfectly vertical, resulting in the rod rotating clockwise about the pivot. When the rod is horizontal, what is the magnitude of the tangential acceleration of its center of mass?

Anonymous User Physics 14 Aug, 2019 1 Answer 140 views

A triangular frame consists of three identical rods, each of mass m and length l. It rests upright on a horizontal smooth surface with its lower right corner against a stop about which the frame could pivot. A horizontal force of magnitude F is applied to the upper corner of the frame as shown in the figure. What is the largest value of F may have without causing the frame to pivot upward about the stop?


Anonymous User Physics 11 Aug, 2019 1 Answer 139 views

A uniform, solid cylinder having mass M and radius R is pulled by a horizontal force F acting through the center as shown. The cylinder rolls to the right without slipping. What is the magnitude of the force of friction between the cylinder and the ground?

Anonymous User Physics 11 Aug, 2019 1 Answer 208 views

A parachutist drops freely from an aeroplane for 8s before the parachute opens out.then he descends with a retardation of 2ms reaching the ground with a velocity of 6ms.find the height from which he falls

Anonymous User Physics 04 Aug, 2019 1 Answer 74 views

A ball of density p0 falls from rest from point P onto the surface of a liquid of density p0 in time T. It enters the liquid stops moves up and returns to P in a total time 3T. Neglect viscosity, surface tension and splashing. The ratio p/p0 is equal to

Anonymous User Physics 01 Aug, 2019 1 Answer 118 views

An engine whistling at a constant frequency n0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual difference in the frequency of the sound heard by him before and after the engine across him is

Anonymous User Physics 01 Aug, 2019 0 Answer 97 views

A flat coil of area A and n turns is placed at the centre of a ring of radius r (r2 >> A) and resistance R. The two are co-planar when current in the coil increases from zero to i, the total charge circulating in the ring is?

Ashish Maurya Physics 01 Aug, 2019 1 Answer 465 views

Sample of 2,3 dibromopentane is heat in zinc dust the resulting compound is isolated and heated with hi in presence of p to yield---------

Anonymous User Chemistry 14 Jul, 2019 1 Answer 65 views

In a crystal structure of an element, atoms are present in ccp arrangement and tetrahedral voids, which of the following relation between the atomic radius and edge length is correct for the unit cell which is formed in this arrangement? (a is the edge length and R is the radius of atom)

Anonymous User Chemistry 12 Jul, 2019 1 Answer 161 views

The focal length of the objective of a microscope is 2cm.The final image of object placed 3cm from the objective is formed at least distance of the distinct vision.if the magnifying power is 10 then calculate focal length of eyepiece.

Anonymous User Physics 08 Jul, 2019 1 Answer 157 views

A copper rod of length L and mass m is sliding down a smooth inclined plane of inclination  with a constant speed v.  A current I is flowing in perpendicular to the plane of diagram inwards. A vertically upward magnetic field B exists in this region. The magnitude of the required magnetic B is?



Anonymous User Physics 07 Jul, 2019 1 Answer 336 views