1)the frequency of aspring oscillator is 4 hz then its period is
A )0.5 second
b )0.25 second
c )4 second
d )5 second
2)what its period of spring loaded 10kg where k=10N/M
A )12.56 sec
B )25.12 sec
C )6.28 sec
D )0 sec
3) the simple pendulum have amaximum P. E at the
A) lowest central point
b )end
c) highest point
d) none
4) which of the statement below correct about waves
A )all waves carry energy whithout transferring matter
B )all waves carry energy by transferring matter
C) all waves do not carry energy
D )all waves transfer matter
5)sound waves travel at various speeds in different substances which of the following statments is not true
A )sound waves are coused by vibrating objects
B)sound waves are longitudinal waves
C)sound waves can be reflected refracted and diffracted . but they cannot travel through vacuum
D)sound waves generally travel faster in gasses than i liquids, faster in liquids than in solid