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

Prompta snowboarder stands at the top of a hill and decides to see if he can increase his speed on his next trip down the slope.describe one thing the snowboarder could do to incrlase his speed on the slope. explain why this would cause his speed toincrease relate one of newton's laws to this problem.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r