Question
P does one fourth as much work as Q in two third of the
time. If together they take 24 days to complete the work, how much time shall Q take to do it?Solution
Let the whole work be done by Q in x days In 2/3 rd of time work by P = 1/4 1/4 of work is done by P in 2/3x days Whole work is done by P in (4 × 2)/(3× x) days = 8/3x days => 1/x + 3/8x = 1/24 => (8+3)/(8x) = 1/24 => x = 33 days
Which of the following waves require a medium to travel?
What is the function of a fuse in an electric circuit?
If lift is going up with acceleration, the apparent weight of a body is -
The Pointing vector of electromagnetic waves has the same dimensions as that of:
A particle of mass m is placed in a potential V(x) = ax² + bx⁴. For small oscillations around equilibrium, its time period is:
If a body of mass 5 kg is raised to 10 meters height, find its potential energy. (g = 9.8 m/s²)
A closely wound solenoid 40 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 2 cm. If the current carried is 8.0 A, e...
When white light passes through a glass prism, which color deviates the least?
A beam of light consisting of two wavelengths, 600 nm and 420 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find...