a 2000 hz sound wave strikes lake and penetrates into water.If speed of sound in water is 1500m/s the frequency and wavelength are
hariharan108
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December 2022
in a chemical, oxygen , carbon and nitrofen are in the rate 8:5:3. If the actual amount of nitrogen is 21gm find the mass of the chemical
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December 2022
the salary of a person was reduced by 10%.By what % should his salary be raised so as to bring it at par with his original salary
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December 2022
The average age of two brothers is 13 It is increased by 11 years when their mother's age is also included. The age of the mother is :(A) 45 years (B) 46 years (C) 47 years (D) 48 years
hariharan108
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December 2022
A and B can do a piece of work in 15 days; B and C can do it in 12 days while C and A can finish it 20 days. In how many days will A,B,C finish it working together?
hariharan108
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December 2022
a block of mass 2 kg is kept on the floor . the coefficient of static friction is 2.5 N. what is the frictional force between block and floor
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December 2022
a body moving along straight line is brought to rest in 2 sec by a force F1 and in 3 sec by a force F2 the ratio is F1/F2 is
hariharan108
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December 2022
Among the following outermost configurations of transition metals which shows the highest oxidation state , (a) 3d^3 , 4s^2 (b) 3d^5 , 4s^1 (c) 3d^5 , 4s^2 (d) 3d^6 , 4s^2