The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.65 m and 1.05 m, respectively. the respective rotational speeds are 454 rev/min and 4,130 rev/min. calculate the speeds of the tips of both rotors. compare these speeds with the speed of sound, 343 m/s.

the device is called “ rocket engine”

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

the part of the wave he is travelling on is the crest

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .