3. An amusement park ride has a frequency of 0.05 Hz. What
is the ride's period?
a. 5 s
c. 20 s
b. 10 s
d. 40 s

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Need on both questionswill markbr />

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?