A vinyl record makes 90 rotations in a minute. The diameter of the disk is 34 cm. Find the linear velocity of a point on the circumference of the disk in m/s.

1.6 m/s

Explanation:

The relationship between linear speed and angular speed for a rotational motion is

where

v is the linear speed

is the angular speed

r is the distance from the axis of rotation

For the vinyl record here, we have:

Keeping in mind that

We can convert it to rad/s:

The diameter of the disk is 34 cm, so the radius is

Therefore, the linear velocity of  a point on the circumference is

d) physical means can be used to separate the components of air.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//