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Let speed of car be s kmph Time taken by car travel total distance = 100/25 x 2 = 8 hrs Time taken by truck to cover total distance = 100/30 x 12 = 40 hrs so, s x 8 = (120 - s) x 40 8s = 4800 - 40s s = 100 so, riquired distance = 20 x 40 = 800 km
A sound with a single frequency is called a:
What happens to your weight when you are in a lift which goes down?
Which one of these is not a property of conservative force?
A body of mass 3 kg is acted upon by two perpendicular forces 9 N and 12 N. Find the resultant of two forces and the acceleration of the body.
The polarization of electromagnetic waves demonstrates that they are:
The pitch of a sound is determined by its:
Which of the following scientific discoveries was made by C.V Raman?
Decibel is used to measure the ___________.
The heat required to raise the temperature of 1 kg of water by 1°C is called:
In an experimental arrangement of a Fresnel's biprism, monochromatic light of wavelength 2. is used to produce interference fringe pattern. On introduc...
