Question
A bag contains 5 red flowers, 7 yellow flowers and 8
green flowers. 3 flowers are drawn randomly. What is the probability that the flowers drawn contain flowers of different colors?ÂSolution
Required probability = (5C1 x 7 C1 x 8C1)/(20C3) = (5 x 7 x 8 x 6 )/(20 x 19 x 18 ) = 14/57Â
The intensity of any wave is proportional to which quantity?
What is the phenomenon of light splitting into colors when passing through a prism? Â
If Planck’s constant h, gravitational constant G, and speed of light v are taken as fundamental units, the dimension of time is:
A stone of mass 0.08 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the stone during its downward motion. Ignore ...
Which law states that energy can neither be created nor destroyed?
If the vector sum of torques acting on a system is zero, then the object is in ________.
A transformer works on which principle?
Sounds of frequencies less than about ______ vibrations per second cannot be detected by the human ear.
An electron and a proton are accelerated by the same potential difference. Which one has a longer de Broglie wavelength?
A copper block of mass 3 kg is heated in a furnace to a temperature of 450°C and then placed on a large ice block. Find the maximum amount of ice that...
