A car moving at 20m/s with its horn blowing (f = 1200Hz) ...
A car moving at 20m/s with its horn blowing (f = 1200Hz) is chasing another car going at 15m/s. What is the apparent frequency of the horn as heard by the driver being chased?
1.22KHz
2.40KHz
8.12KHz
1.22Hz
Correct answer is A
| f\(_1\) | = | f(v - v\(_o\))
v - v\(_s\) |
= | 1200(340 - 15)
340 - 20 |
= | 1.22KHz |
If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT? ...
An electron of mass 9.1 x 10\(^{-31}\) kg moves with a speed of 2.0 x 10\(^6\) ms\(^{-1}\) roun...
A beam consisting of \(\alpha\)-particles. \(\beta\)-particles and \(\gamma\)-rays pass through...
The magnification of an object 2cm tall when placed 10cm in front of a plane mirror is ...
A heat sensitive resistor made of a semiconductor is called? ...