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what is normal reaction how to find it normal reaction is the force acting among two contact surfaces like if you push a wall you will feel an
a bucket of water is suspended from a xed point by a rope the bucket is set in motion and the system swings as a pendulum though the bucket leaks and
two students a and b living in neighbouring college rooms decided to economise by connecting their ceiling lights in seriesthey agreed that each
a rocket is intended to leave the earths gravitational eld the fuel in its key engine is a little less than the amount that is essential and an
a bicycle is supported so that it is stopped from falling sideways but can move forwards or backwards its pedals are in their highest and lowest
two 20-g atworms climb over a very thin wall 10 cm high one of the worms is 20 cm long the other is wider and only 10 cm longwhich of them has done
what are links and symbolic links in unix file system a link is a second name not a file for a file links can be used to allocate more than one name
brief about the directory representation in unixa unix directory is a file having a correspondence among filenames and inodes a directory is a
a boat can travel at a speed of 3 m s-1 on still water a boatman needs to cross a river whilst covering the shortest possible distance in what
three small snails are each at a vertex of an equilateral triangle of side 60 cm the rst sets out towards the second the second towards the third and
the temperature of a gas is held constant whereas its volume is reduced the pressure the gas exerts on the walls of its container enhances
while travelling in a straight line a car uniformly alters its speed from 50 kilometres per hour to 110 kilometres per hour in 5 seconds the
an object with a mass of 5 kilograms is a distance of 5 meters above the surface of the earth if the acceleration because of gravity is 10 meters
a proton and an alpha particle pass by the gap of a strong magnet if both particles have the similar initial velocity how many times greater will
photoelectric electricity is produced directly from solar energy when which following are absorbed in a semiconductor to create an electric
assume a crane lifts a 900 kilogram wrecking ball 12 meters above a concrete slab 105840 joules of potential energy are kept in the wrecking
what is a caloriea amount of heat needed to raise one gram of water one degree celsiusb amount of work needed to move one gram of water by
an object located four focal lengths in front of a thin converging lens is moved to within two focal lengths of the lens as a result does the
a 5 kilogram mass is lifted at constant velocity from a shop floor by a rope that passes by a pulley attached to the shops ceiling neglecting the
the doppler effect shows that the spectrum of light from a visible body moving away from the earth will experience a shift in frequency when viewed
gauss law of magnetism gauss law of electricityfaradays law of induction and amperes law form the basic equations of electromagnetism this
an air dielectric is changed with a glass dielectric inside a capacitor of fixed dimensions relatively speaking what will occur to the quantity
a 50 kilogram ice skater glides across the ice in a straight line at 7 meters per second if she bends down and scoops up a 20 kilogram child
an explorer is riding his camel in the desert up ahead he sees what appears to be a pool of water he can tell if it is a real pool of water or a
hiker stands at the bottom of steep hill the hiker may follow a straight line path to the top of the hill a distance of 300 feet or she may