A student hears a police siren. What would change the frequency that the student hears? Check all that apply. *

1. if the student walked toward the police car
2. if the student walked away from the police car
3. if the police car moved toward the student
4. if the police car moved away from the student
5. if the intensity of the siren increased
6. if the intensity of the siren decreased

1,2,3,4

Explanation:

sirens can't be increased or decreased but the movement of the car or the person can change the presentation of the siren noise either making it louder or quieter

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

pe = weightxheight = 2000x1000=2,000,000joules