Decide if each statement is true or false. (no need to justify your answers! ) a) a damped spring-mass system will eventually settle down to a steady-state oscillation uwith frequency equal to that of the natural frequency of the spring. (no external force is present.) b) if there is no damping, and no external force, then the oscillations will maintain a fixed amplitude.

b.an increase in a causes b to decrease

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m