Question

Which of the following statements are true?

True False  The proper time interval for an event depends upon the speed of the observer.
True False  The proper length of a meter stick is always one meter.
True False  Relativistic effects become important in our calculations (for example, more than a 1% effect) only when speeds are close to the speed of light in vacuum.
True False  The total kinetic energy of a body is limited, since its speed can never exceed 'c'.
True False  The proper time interval is the shortest time interval measured in any inertial reference frame.
True False  The length along the direction of motion of a moving object is shorter than when the object is at rest.
True False  All moving clocks runs slow.

Answer 1

1) False(  the amount of time between two events as measured by a single clock present at both events)

2)True(proper length is the length measured by an observer at rest relative to the meter stick. )

3)True

4) False.( Kinetic energy can be whatever your budget and technology allows. Mass increase at relativistic speed makes up for the lack of velocity increase.)

5) true (since relativistic effects always dilate time intervals.)

6)true ( relative to the observers who see it as moving.)

7)true (relative to the observers who see it as moving.)