8 photos: Actors who have played Batman. Christian Bale â After the disaster of Batman & Robin, the franchise was destined to remain a joke until director Christopher Nolan came along to reinvent the role and finally make the Dark Knight, well, dark. photos: Actors who have played Batman. Christian Bale â After the disaster of Batman & Robin, the franchise was destined to remain a joke until director Christopher Nolan came along to reinvent the role and finally make the Dark Knight, well, dark.
Instantaneous speed is the velocity of an object at a certain time. For example:- Suppose you are driving in a car and the speedometer constantly varies; this is because the speedometer gives speed at a particular moment of time.
Examples of Frequency. Although the standard definition of frequency is based on events per second, other units of time may be used, such as minutes or hours. For example, a human heart may beat at a frequency of 68 beats per minute. A 78 record on a turntable turns at the rate of 78 revolutions per minute or 78 rpm.