A two-slit arrangement is set up to produce an interference pattern on a screen. The fringes are too close together for convenient observation. How could the distance between them be increased?
A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm2. Find the Young's modulus for that rubber.
On the ground the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50,where R is the radius of the Earth
In Michelsion's interoferometer, if the moveable mirror is moved through a distance 0.05 mm and 500 finges are observed, then the wavelength of light used is
A car travels due east on a level road for 3 km. it then turns the North at an intersection and travels 4 km before stopping.The magnitude of the resultant displacement of car is
A bomb of mass 12 kg initially at rest explodes into two pieces of masses 4 kg and 8 kg.The speed of the 8 kg mass is 6 ms-1,The K.E of the 4 kg mass is
The initial velocity of a body moving along a straight line in 7 m/s.It has a uniform acceleration of 4 m/s2.The distance covered by the body in the 5th second of its motion is
In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will
A tank containing water has an orifice in one vertical side. If the centre of the orifice is 10 m below the surface level in tank, then velocity of efflux is
A science student takes 100 observations in an experiment Second time he takes 500 observations in the same experiment By doing so the possible error becomes
An electron and proton are placed a distance r apart in air the ratio of the electro static force to gravitational force between them is of the order of
Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water
.Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms?
The rate of reaction between A and B increases by a factor of 100, when the concentration of A is increased 10 folds, the order of reaction with respect to A is
The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears.The behaviour is a characteristic of substance forming
