Question
A tank is filled with 3 inlet pipes and 2 outlet pipes.
Inlet pipes A, B, and C can fill the tank in 6 hours, 8 hours, and 12 hours, respectively. Outlets D and E can empty the tank in 9 hours and 15 hours, respectively. If all the pipes are opened simultaneously, how long will it take to fill the tank?Solution
The rate of A = 1/6, B = 1/8, C = 1/12, D = -1/9, and E = -1/15 (per hour). Combined rate = (1/6 + 1/8 + 1/12 - 1/9 - 1/15) = 71/360Â Time taken to fill the tank = 360/71 hours. = 5 hours(approx) Answer: a) 5 hours
A wire is stretched by a force such that it experiences a strain of 2 x 10-3. If Young’s modulus of the material is 2 x 1011 Pa,...
The work done by a centripetal force on an object moving in a circular path is:
What is colour of light related to?
Which of the following decays does not change the atomic number of the nucleus?
What is the value of 1 horsepower in watts? Â
Which quantity has the same dimensional formula as impulse?
The current across the 3 ohm resistance in the given circuit is:
A mass of 0.1 kg executes SHM with amplitude 10 cm. Its kinetic energy at the mean position is 8 × 10-3 J. What is its equation of motion if...
A soap bubble shows colours when illuminated with white light. This is due to –
