Aphonograph record 30.0cm in diameter rotates 33.5 times per minute. what is its frequency? what is its period? what is the linear speed of a point on its rim? what is the centripetal acceleration of a point on its rim?

Explanation:

Given that phonograph rotates 33.5 times per minute:

Frequency of the phonograph =

Time period =

time period = 0.0298 × 60 seconds =1.788 seconds

Radius r = 15 cm = 0.15 m (1 m = 100 cm)

The linear speed =

The centripetal acceleration of a point on its rim:

Centripetal acceleration is .

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.