what is the number of molecules in 0.25 moles of oxygen gas?
A silver ornament is suspected to be hollow. Its weight is 250 gms and it displaces 50 cm3 of water. If the density of silver is 10 g/cm3 find the volume of the cavity.
What is the difference between O2 and 2O?
NAME THE TARGET ORGANS FOR THE FOLLOWING DISEASES.
(A) HEPATITIS TARGETS _
(B) PNEUMONIA TARGETS _
(C) FITS (OR) UNCONSCIOUSNESS TARGETS _
(D) FUNGAL DISEASE TARGETS
What is the work done to increase the velocity of a car from 30km/h to 60km/h if the mass of the car is 1500kg?
happens to the force between two objects, if
mass of one object is doubled?
distance between the objects is doubled and tripled?
masses of both objects are doubled?
a man fires a shot and hears an echo from a cliff after 2 sec. he walks 85m towards the cliff and the echo of the 2nd shot is now heard after 1.4sec. what is the velocity of sound and how far was the man from the cliff when he heard the eco first?
A piece of wax weighs 18.80 g wt. in air. A piece of metal is found to weigh 17.03 g wt.
in water. It is tied to the wax and both together weigh 15.23 g wt. in water. Find therelative density of wax?
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